Russian River: toxic algae advisories
Russian River, Sonoma County. See all Sonoma County waters.
What the state's records say
Algal mat alert sign, last posted Oct 19, 2026. No all-clear recorded.
22 reported spots here have an advisory with no all-clear recorded.
Reporting is voluntary, so the state may not have recorded an end even if conditions changed. Check posted signs and the official map.
What this level asks: The state recorded an advisory of a type outside the Caution, Warning and Danger levels. Read the sign posted at the water.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Russian River
The state has an advisory on file for Russian River (Algal mat alert sign), last posted Oct 19, 2026, and no all-clear recorded. Keep your dog out of the water and away from scum on the shore until the state records an end.
Reported spots
The state records each report at a spot, such as a beach or a boat ramp. Each spot's latest deciding record:
| Spot | Status |
|---|---|
| Patterson Point Preserve | Algal mat alert sign, last posted Oct 19, 2026. No all-clear recorded. |
| Monte Rio Beach | Algal mat general awareness sign, last posted Sep 8, 2026. No all-clear recorded. |
| Sunset Beach | Algal mat general awareness sign, last posted Sep 8, 2026. No all-clear recorded. |
| Camp Rose Beach | Algal mat general awareness sign, last posted Sep 8, 2026. No all-clear recorded. |
| Cloverdale River Park Beach | Algal mat general awareness sign, last posted Sep 8, 2026. No all-clear recorded. |
| Patterson Point | Algal mat alert sign, last posted Sep 8, 2026. No all-clear recorded. |
| Healdsburg Veterans Beach | Algal mat general awareness sign, last posted May 22, 2026. No all-clear recorded. |
| Johnson's Beach | Algal mat general awareness sign, last posted Aug 20, 2025. No all-clear recorded. |
| Forestville Access Beach | Algal mat general awareness sign, last posted Jul 29, 2025. No all-clear recorded. |
| Steelhead Beach | Algal mat general awareness sign, last posted Jul 29, 2025. No all-clear recorded. |
| Healdsburg Veterans Beach | Algal mat general awareness sign, last posted Jul 29, 2025. No all-clear recorded. |
| Del Rio Woods Beach | Algal mat general awareness sign, last posted Jul 29, 2025. No all-clear recorded. |
| Syar | The state's latest record, from Dec 15, 2022, recommends no advisory. |
| Alexander Valley Road | The state's latest record, from Dec 15, 2022, recommends no advisory. |
| Johnson's Beach | The state recorded an end date of Dec 15, 2022. |
| Monte Rio Beach | The state recorded an end date of Dec 15, 2022. |
| Sunset Beach | The state recorded an end date of Dec 15, 2022. |
| Forestville Access Beach | The state recorded an end date of Dec 15, 2022. |
| Steelhead Beach | The state recorded an end date of Dec 15, 2022. |
| Healdsburg Veterans Beach | The state recorded an end date of Dec 15, 2022. |
| Camp Rose Beach | The state recorded an end date of Dec 15, 2022. |
| Del Rio Woods Beach | The state recorded an end date of Dec 15, 2022. |
| Cloverdale River Park Beach | The state recorded an end date of Dec 15, 2022. |
| Patterson Point | The state recorded an end date of Dec 15, 2022. |
| Hopland | The state's latest record, from Dec 15, 2022, recommends no advisory. |
| Mirabel | The state's latest record, from Dec 15, 2022, recommends no advisory. |
| near Duncans Mills | The state's latest record, from Jul 11, 2022, recommends no advisory. |
| upstream of Steelhead Beach | The state's latest record, from Jul 8, 2021, recommends no advisory. |
| upstream of Riverfront Park | The state's latest record, from Jul 8, 2021, recommends no advisory. |
| Alexander Valley Campground | The state's latest record, from Jul 8, 2021, recommends no advisory. |
| Sunset Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Steelhead Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Monte Rio Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Johnson's Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Healdsburg Veterans Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Forestville Access Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Del Rio Woods Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Cloverdale River Park Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Camp Rose Beach | Algal mat general awareness sign, last posted Jun 15, 2021. No all-clear recorded. |
| Patterson Point | Algal mat general awareness sign, last posted Jun 11, 2021. No all-clear recorded. |
| Russian River, Sunset Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Steelhead Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Patterson Point | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Monte Rio Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Johnson's Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Camp Rose Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Healdsburg Veterans Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Forestville Access Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Del Rio Woods Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
| Russian River, Cloverdale River Park Beach | The state's latest record, from Aug 27, 2020, recommends no advisory. |
Advisory history
Every advisory record the state has published for Russian River, newest first. "None" is the state's record that no advisory was recommended on that date. "NA" records do not change a status.
| Date | Spot | State's level | Notes |
|---|---|---|---|
| Oct 19, 2026 | Patterson Point Preserve | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; Visual monitoring only-present bloom |
| Oct 2, 2026 | Patterson Point Preserve | Algal mat alert sign | Bottom/benthic bloom observed; No cyano bloom w/testing; Updates from routine monitoring program-organization; Visual monitoring only-present bloom |
| Sep 17, 2026 | Patterson Point Preserve | Algal mat alert sign | Bottom/benthic bloom observed; No cyano bloom w/testing; Updates from routine monitoring program-organization; Visual monitoring only-present bloom |
| Sep 15, 2026 | Patterson Point Preserve | Algal mat alert sign | No cyano bloom w/testing; Testing results below posting triggers |
| Sep 8, 2026 | Monte Rio Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 8, 2026 | Sunset Beach | Algal mat general awareness sign | Rec algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 8, 2026 | Camp Rose Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 8, 2026 | Cloverdale River Park Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 8, 2026 | Patterson Point | Algal mat alert sign | Updates from routine monitoring program-organization; Visual monitoring only-present bloom |
| Aug 25, 2026 | Sunset Beach | Algal mat general awareness sign | Rec algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 25, 2026 | Monte Rio Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 25, 2026 | Camp Rose Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 25, 2026 | Cloverdale River Park Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 11, 2026 | Sunset Beach | Algal mat general awareness sign | Rec algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 11, 2026 | Camp Rose Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 11, 2026 | Cloverdale River Park Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 11, 2026 | Camp Rose Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 11, 2026 | Cloverdale River Park Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 3, 2026 | Monte Rio Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 3, 2026 | Cloverdale River Park Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 3, 2026 | Sunset Beach | Algal mat general awareness sign | Rec algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 3, 2026 | Sunset Beach | Algal mat general awareness sign | Rec algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 3, 2026 | Monte Rio Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 3, 2026 | Camp Rose Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 3, 2026 | Camp Rose Beach | Algal mat general awareness sign | Posted algal mat general awareness; Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 22, 2026 | Healdsburg Veterans Beach | Algal mat general awareness sign | Testing results below posting triggers |
| May 14, 2026 | Healdsburg Veterans Beach | Algal mat alert sign | Suspected illness reported; Under investigation |
| Nov 14, 2025 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; visual monitoring based advisory; Visual monitoring only-present bloom |
| Oct 20, 2025 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Suspected illness reported; visual monitoring based advisory; Visual monitoring only-present bloom |
| Oct 17, 2025 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; visual monitoring based advisory; Visual monitoring only-present bloom |
| Oct 6, 2025 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; visual monitoring based advisory; Visual monitoring only-present bloom |
| Aug 20, 2025 | Johnson's Beach | Algal mat general awareness sign | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 5, 2025 | Johnson's Beach | Algal mat alert sign | Alert-detached mats observed; Suspected bloom, investigation ongoing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 5, 2025 | Johnson's Beach | Algal mat alert sign | Alert-detached mats observed; Suspected bloom, investigation ongoing; Updates from routine monitoring program-organization |
| Aug 4, 2025 | Johnson's Beach | Algal mat alert sign | Alert-detached mats observed; Suspected bloom, investigation ongoing; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Jul 29, 2025 | Johnson's Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Patterson Point | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Sunset Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Forestville Access Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Steelhead Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Healdsburg Veterans Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Camp Rose Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Del Rio Woods Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Monte Rio Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Cloverdale River Park Beach | Algal mat general awareness sign | Posted algal mat general awareness |
| Jul 29, 2025 | Monte Rio Beach | General awareness | Posted algal mat general awareness |
| Dec 31, 2023 | Patterson Point | Algal mat general awareness sign | End date recorded: Dec 31, 2023. De-posting advisory. |
| Dec 31, 2023 | Monte Rio Beach | General awareness | End date recorded: Dec 31, 2023. De-posting advisory. |
| Dec 31, 2023 | Patterson Point | Algal mat general awareness sign | End date recorded: Dec 31, 2023. De-posting advisory. |
| Dec 31, 2023 | Monte Rio Beach | General awareness | De-posting advisory. |
| Aug 23, 2023 | Monte Rio Beach | Algal mat alert sign | Bottom/benthic bloom observed; visual monitoring based advisory |
| Aug 18, 2023 | Monte Rio Beach | Algal mat alert sign | Suspected bloom, investigation ongoing; Suspected illness reported |
| Aug 18, 2023 | Patterson Point | Algal mat alert sign | Visual monitoring only-present bloom |
| Aug 18, 2023 | Monte Rio Beach | Algal mat general awareness sign | Suspected bloom, investigation ongoing; Suspected illness reported |
| Aug 15, 2023 | Monte Rio Beach | Algal mat general awareness sign | Posted algal mat general awareness; Under investigation |
| Dec 15, 2022 | Syar | None | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Alexander Valley Road | None | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Johnson's Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Johnson's Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Monte Rio Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Sunset Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Forestville Access Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Steelhead Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Healdsburg Veterans Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Camp Rose Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Del Rio Woods Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Cloverdale River Park Beach | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Patterson Point | Algal mat general awareness sign | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Hopland | None | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Mirabel | None | End date recorded: Dec 15, 2022. De-posting advisory. |
| Dec 15, 2022 | Mirabel | None | De-posting advisory. |
| Dec 15, 2022 | Hopland | None | De-posting advisory. |
| Dec 15, 2022 | Patterson Point | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Cloverdale River Park Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Del Rio Woods Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Camp Rose Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Healdsburg Veterans Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Steelhead Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Forestville Access Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Sunset Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Monte Rio Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Johnson's Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Monte Rio Beach | Algal mat general awareness sign | De-posting advisory. |
| Dec 15, 2022 | Alexander Valley Road | None | De-posting advisory. |
| Dec 15, 2022 | Syar | None | De-posting advisory. |
| Nov 14, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 14, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 8, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 1, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Nov 1, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 31, 2022 | Monte Rio Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Johnson's Beach | Algal mat alert sign | Bottom/benthic bloom observed; Suspected illness reported; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Sunset Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Forestville Access Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Steelhead Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Healdsburg Veterans Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Camp Rose Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Del Rio Woods Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Cloverdale River Park Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 31, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 27, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 27, 2022 | Hopland | Algal mat alert sign | Updates from routine monitoring program-organization |
| Oct 27, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 24, 2022 | Mirabel | Algal mat alert sign | Updates from routine monitoring program-organization |
| Oct 24, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 24, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 20, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 18, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 18, 2022 | Cloverdale River Park Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Del Rio Woods Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Camp Rose Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Healdsburg Veterans Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Steelhead Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Forestville Access Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Sunset Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Johnson's Beach | Algal mat alert sign | Bottom/benthic bloom observed; Suspected illness reported; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Monte Rio Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 18, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 10, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Oct 10, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 5, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Oct 5, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 28, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Monte Rio Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Johnson's Beach | Algal mat alert sign | Bottom/benthic bloom observed; Suspected illness reported; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Sunset Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Forestville Access Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Steelhead Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Healdsburg Veterans Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Camp Rose Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Del Rio Woods Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Cloverdale River Park Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 28, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 28, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 23, 2022 | Syar | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 23, 2022 | Alexander Valley Road | Algal mat alert sign | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 21, 2022 | Syar | Algal mat alert sign | Updates from routine monitoring program-organization |
| Sep 21, 2022 | Alexander Valley Road | Algal mat alert sign | Updates from routine monitoring program-organization |
| Sep 15, 2022 | Cloverdale River Park Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Del Rio Woods Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Camp Rose Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Healdsburg Veterans Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Steelhead Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Forestville Access Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Sunset Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Johnson's Beach | Algal mat alert sign | Bottom/benthic bloom observed; Suspected illness reported; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Monte Rio Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 15, 2022 | Syar | Algal mat alert sign | Updates from routine monitoring program-organization |
| Sep 15, 2022 | Alexander Valley Road | Algal mat alert sign | Updates from routine monitoring program-organization |
| Aug 29, 2022 | Mirabel | Blank in the state's file | Updates from routine monitoring program-organization |
| Aug 29, 2022 | Syar | Algal mat alert sign | Updates from routine monitoring program-organization |
| Aug 29, 2022 | Alexander Valley Road | Algal mat alert sign | Updates from routine monitoring program-organization |
| Aug 29, 2022 | Syar | Algal mat alert sign | Updates from routine monitoring program-organization |
| Aug 29, 2022 | Alexander Valley Road | Blank in the state's file | Updates from routine monitoring program-organization |
| Aug 24, 2022 | Johnson's Beach | Algal mat alert sign | Bottom/benthic bloom observed; Suspected illness reported; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Cloverdale River Park Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Del Rio Woods Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Camp Rose Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Healdsburg Veterans Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Steelhead Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Forestville Access Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Sunset Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Johnson's Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Monte Rio Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 18, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization; visual monitoring based advisory |
| Aug 2, 2022 | Cloverdale River Park Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Del Rio Woods Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Camp Rose Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Healdsburg Veterans Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Steelhead Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Forestville Access Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Sunset Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Johnson's Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Monte Rio Beach | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Aug 2, 2022 | Patterson Point | Algal mat alert sign | Bottom/benthic bloom observed; Updates from routine monitoring program-organization |
| Jul 27, 2022 | Del Rio Woods Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Cloverdale River Park Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Camp Rose Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Healdsburg Veterans Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Steelhead Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Forestville Access Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Sunset Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Johnson's Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 19, 2022 | Monte Rio Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 13, 2022 | Del Rio Woods Beach | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 13, 2022 | Patterson Point | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jul 11, 2022 | near Duncans Mills | None | No cyano, other algae present. |
| Jul 11, 2022 | near Duncans Mills | None | No cyano, other algae present. |
| Jul 11, 2022 | near Duncans Mills | NA - refer to Report Details | Under investigation |
| Jul 7, 2022 | Patterson Point | Algal mat alert sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Cloverdale River Park Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Del Rio Woods Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Camp Rose Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Healdsburg Veterans Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Steelhead Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Forestville Access Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Sunset Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Johnson's Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Monte Rio Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| Jun 6, 2022 | Patterson Point | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Cloverdale River Park Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Del Rio Woods Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Camp Rose Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Healdsburg Veterans Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Steelhead Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Forestville Access Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Johnson's Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Monte Rio Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Patterson Point | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Sunset Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Johnson's Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Monte Rio Beach | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 20, 2022 | Patterson Point | Algal mat general awareness sign | Updates from routine monitoring program-organization |
| May 9, 2022 | Cloverdale River Park Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Del Rio Woods Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Camp Rose Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Healdsburg Veterans Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Steelhead Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Forestville Access Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Sunset Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Johnson's Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Monte Rio Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Patterson Point | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Johnson's Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Monte Rio Beach | None | Updates from routine monitoring program-organization |
| May 9, 2022 | Patterson Point | None | Updates from routine monitoring program-organization |
| Jul 8, 2021 | upstream of Steelhead Beach | None | Testing results below posting triggers |
| Jul 8, 2021 | upstream of Riverfront Park | None | Testing results below posting triggers |
| Jul 8, 2021 | Alexander Valley Campground | None | Testing results below posting triggers |
| Jun 15, 2021 | Sunset Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Steelhead Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Monte Rio Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Johnson's Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Healdsburg Veterans Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Forestville Access Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Del Rio Woods Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Cloverdale River Park Beach | Algal mat general awareness sign | |
| Jun 15, 2021 | Camp Rose Beach | Algal mat general awareness sign | |
| Jun 11, 2021 | Patterson Point | Algal mat general awareness sign | |
| Aug 27, 2020 | Russian River, Sunset Beach | None | |
| Aug 27, 2020 | Russian River, Steelhead Beach | None | |
| Aug 27, 2020 | Russian River, Patterson Point | None | |
| Aug 27, 2020 | Russian River, Monte Rio Beach | None | |
| Aug 27, 2020 | Russian River, Johnson's Beach | None | |
| Aug 27, 2020 | Russian River, Camp Rose Beach | None | |
| Aug 27, 2020 | Russian River, Healdsburg Veterans Beach | None | |
| Aug 27, 2020 | Russian River, Forestville Access Beach | None | |
| Aug 27, 2020 | Russian River, Del Rio Woods Beach | None | |
| Aug 27, 2020 | Russian River, Cloverdale River Park Beach | None |
Source
Advisory data: California State Water Resources Control Board, Freshwater Harmful Algal Bloom Program, via data.ca.gov (public domain). Advisories are recommendations; reporting is voluntary and incomplete. The state's data. An advisory ends only when the state records a later "None" (no advisory recommended) at the same spot, or an end date. A blank end date is unknown.