Iron Gate Reservoir: toxic algae advisories
Iron Gate Reservoir, Siskiyou County. See all Siskiyou County waters.
What the state's records say
Danger advisory, last posted Nov 7, 2023. No all-clear recorded.
7 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: Toxins may be at levels that can seriously harm people and animals. Stay out of the water and keep children and pets away from the water and the shore.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Iron Gate Reservoir
The state has an advisory on file for Iron Gate Reservoir (Danger advisory), last posted Nov 7, 2023, 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.
Satellite estimate (not an advisory)
No satellite reading on file for Iron Gate Reservoir in recent weeks. Clouds, ice, or a lake shape the satellite's estimate near its center misses can cause this. It is a gap in the data, not a reading.
This is a satellite estimate from the U.S. EPA's Cyanobacteria Assessment Network, not an advisory. It estimates how much cyanobacteria is in the water near the lake's center, not whether toxins are present: a high number does not mean toxins, and a low one does not mean there are none. It covers lakes of about 1 square kilometer and larger, so small ponds, dog parks and most rivers are not covered, and clouds can hide a lake for weeks. It never changes the advisory status above.
Satellite estimates: U.S. EPA Cyanobacteria Assessment Network (CyAN), from Copernicus Sentinel-3 data. Provisional, research-level estimates; EPA does not endorse this site. Checked Oct 22, 2026.
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 |
|---|---|
| at Jay Williams Boat Ramp (Public Health) | The state's latest record, from Dec 18, 2023, recommends no advisory. |
| at Camp Creek (Public Health) | The state's latest record, from Dec 18, 2023, recommends no advisory. |
| at Log Boom | Warning advisory, last posted Nov 7, 2023. No all-clear recorded. |
| at Camp Creek (Public Health) | The state's latest record, from Dec 16, 2022, recommends no advisory. |
| at Jay Williams Boat Ramp (Public Health) | The state's latest record, from Dec 16, 2022, recommends no advisory. |
| at Log Boom | The state's latest record, from Dec 16, 2022, recommends no advisory. |
| at Log Boom | Caution advisory, last posted Jul 21, 2021. No all-clear recorded. |
| at Jay Williams Boat Ramp?(Public Health) | Caution advisory, last posted Jul 21, 2021. No all-clear recorded. |
| at Camp Creek?(Public Health) | Caution advisory, last posted Jul 21, 2021. No all-clear recorded. |
| (RM 190.19) | Caution advisory, last posted Jul 2, 2021. No all-clear recorded. |
| Iron Gate Reservoir, at Camp Creek (IRCC) | Danger advisory, last posted Oct 19, 2020. No all-clear recorded. |
| Iron Gate Reservoir, at Jay Williams (IRJW) | Danger advisory, last posted Sep 21, 2020. No all-clear recorded. |
| Iron Gate Reservoir at Log Boom | Reports on file, with no advisory level the state has classified. |
| Iron Gate Reservoir at Camp Creek | Reports on file, with no advisory level the state has classified. |
| Iron Gate Reservoir at Jay Williams Boat Ramp | Reports on file, with no advisory level the state has classified. |
| Iron Gate Reservoir - Jay Williams Boat Ramp | Reports on file, with no advisory level the state has classified. |
Advisory history
Every advisory record the state has published for Iron Gate Reservoir, 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 |
|---|---|---|---|
| Dec 18, 2023 | at Jay Williams Boat Ramp (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Dec 18, 2023 | at Camp Creek (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Dec 5, 2023 | at Camp Creek (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Dec 5, 2023 | at Jay Williams Boat Ramp (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Nov 20, 2023 | at Camp Creek (Public Health) | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Nov 20, 2023 | at Jay Williams Boat Ramp (Public Health) | Caution | Advisory based on visual and toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Nov 12, 2023 | at Camp Creek (Public Health) | Warning | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Nov 12, 2023 | at Jay Williams Boat Ramp (Public Health) | Warning | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Nov 7, 2023 | at Camp Creek (Public Health) | Warning | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Nov 7, 2023 | at Jay Williams Boat Ramp (Public Health) | Warning | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Nov 7, 2023 | at Log Boom | Warning | Advisory based on visual and toxins; Floating/planktonic bloom observed; Lake-wide advisory; Updates from routine monitoring program-organization |
| Oct 9, 2023 | at Camp Creek (Public Health) | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Oct 9, 2023 | at Jay Williams Boat Ramp (Public Health) | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 21, 2023 | at Camp Creek (Public Health) | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 21, 2023 | at Jay Williams Boat Ramp (Public Health) | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 21, 2023 | at Jay Williams Boat Ramp (Public Health) | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 21, 2023 | at Log Boom | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 1, 2023 | at Camp Creek (Public Health) | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 1, 2023 | at Jay Williams Boat Ramp (Public Health) | Danger | Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 1, 2023 | at Jay Williams Boat Ramp (Public Health) | Danger | Lake-wide advisory; Updates from routine monitoring program-organization |
| Sep 1, 2023 | at Camp Creek (Public Health) | Danger | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 18, 2023 | at Camp Creek (Public Health) | Warning | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 18, 2023 | at Jay Williams Boat Ramp (Public Health) | Warning | Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 18, 2023 | at Log Boom | Warning | Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 2, 2023 | at Log Boom | Warning | Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 2, 2023 | at Jay Williams Boat Ramp (Public Health) | Warning | Lake-wide advisory; Updates from routine monitoring program-organization |
| Aug 2, 2023 | at Camp Creek (Public Health) | Warning | Alert-high concentration toxins; Lake-wide advisory; Updates from routine monitoring program-organization |
| Jul 27, 2023 | at Camp Creek (Public Health) | Caution | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 27, 2023 | at Jay Williams Boat Ramp (Public Health) | Caution | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 27, 2023 | at Log Boom | Caution | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 30, 2023 | at Camp Creek (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 30, 2023 | at Jay Williams Boat Ramp (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 16, 2023 | at Camp Creek (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 16, 2023 | at Jay Williams Boat Ramp (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 16, 2023 | at Log Boom | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 5, 2023 | at Camp Creek (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 5, 2023 | at Jay Williams Boat Ramp (Public Health) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 24, 2023 | at Log Boom | None | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Dec 16, 2022 | at Camp Creek (Public Health) | None | End date recorded: Dec 16, 2022. De-posting advisory. |
| Dec 16, 2022 | at Jay Williams Boat Ramp (Public Health) | None | End date recorded: Dec 16, 2022. De-posting advisory. |
| Dec 16, 2022 | at Log Boom | None | End date recorded: Dec 16, 2022. De-posting advisory. |
| Dec 16, 2022 | at Log Boom | None | De-posting advisory. |
| Dec 16, 2022 | at Jay Williams Boat Ramp (Public Health) | None | De-posting advisory. |
| Dec 16, 2022 | at Camp Creek (Public Health) | None | De-posting advisory. |
| Nov 28, 2022 | at Camp Creek (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Nov 28, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Nov 14, 2022 | at Camp Creek (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Nov 14, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 20, 2022 | at Camp Creek (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 20, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 20, 2022 | at Log Boom | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 6, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 6, 2022 | at Camp Creek (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 3, 2022 | at Camp Creek (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 3, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Oct 3, 2022 | at Log Boom | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Sep 8, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Sep 7, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Sep 7, 2022 | at Camp Creek (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Sep 7, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Aug 24, 2022 | at Camp Creek (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Aug 24, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Aug 24, 2022 | at Log Boom | Caution | Alert-high concentration toxins; Updates from routine monitoring program-organization |
| Aug 8, 2022 | at Camp Creek (Public Health) | Caution | Updates from routine monitoring program-organization |
| Aug 8, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Updates from routine monitoring program-organization |
| Aug 8, 2022 | at Log Boom | Caution | Updates from routine monitoring program-organization |
| Jul 25, 2022 | at Log Boom | Caution | Updates from routine monitoring program-organization |
| Jul 22, 2022 | at Camp Creek (Public Health) | Caution | Updates from routine monitoring program-organization |
| Jul 22, 2022 | at Jay Williams Boat Ramp (Public Health) | Caution | Updates from routine monitoring program-organization |
| Jul 1, 2022 | at Camp Creek (Public Health) | None | Updates from routine monitoring program-organization |
| Jul 1, 2022 | at Jay Williams Boat Ramp (Public Health) | None | Updates from routine monitoring program-organization |
| Jun 30, 2022 | at Jay Williams Boat Ramp (Public Health) | None | Updates from routine monitoring program-organization |
| Jun 21, 2022 | at Camp Creek (Public Health) | None | Updates from routine monitoring program-organization |
| Jun 21, 2022 | at Jay Williams Boat Ramp (Public Health) | None | Updates from routine monitoring program-organization |
| Jun 21, 2022 | at Log Boom | None | Updates from routine monitoring program-organization |
| Jun 3, 2022 | at Camp Creek (Public Health) | None | Updates from routine monitoring program-organization |
| Jun 3, 2022 | at Jay Williams Boat Ramp (Public Health) | None | Updates from routine monitoring program-organization |
| May 20, 2022 | at Log Boom | None | Updates from routine monitoring program-organization |
| May 19, 2022 | at Jay Williams Boat Ramp (Public Health) | None | Updates from routine monitoring program-organization |
| Jul 21, 2021 | at Log Boom | Caution | Advisory based on visual and toxins |
| Jul 21, 2021 | at Jay Williams Boat Ramp?(Public Health) | Caution | Advisory based on visual and toxins |
| Jul 21, 2021 | at Camp Creek?(Public Health) | Caution | Advisory based on visual and toxins |
| Jul 2, 2021 | (RM 190.19) | Caution | Advisory based on visual and toxins |
| Oct 19, 2020 | Iron Gate Reservoir, at Camp Creek (IRCC) | Danger | Advisory based on visual and toxins |
| Sep 21, 2020 | Iron Gate Reservoir, at Jay Williams (IRJW) | Danger | Advisory based on visual and toxins |
| Sep 29, 2018 | Iron Gate Reservoir at Log Boom | NA - refer to Report Details | |
| Sep 29, 2018 | Iron Gate Reservoir at Camp Creek | NA - refer to Report Details | |
| Sep 29, 2018 | Iron Gate Reservoir at Jay Williams Boat Ramp | NA - refer to Report Details | |
| Sep 29, 2018 | Iron Gate Reservoir - Jay Williams Boat Ramp | NA - refer to Report Details |
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.