Smith Canal: toxic algae advisories
Smith Canal, San Joaquin County. See all San Joaquin County waters.
What the state's records say
Caution advisory, last posted Jul 21, 2022. No all-clear recorded.
4 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: Algae that can make toxins may be present. Keep people, children and pets away from algae and scum, and do not let pets drink the water.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at Smith Canal
The state has an advisory on file for Smith Canal (Caution advisory), last posted Jul 21, 2022, 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 |
|---|---|
| near American Legion Park (SC) | The state's latest record, from Oct 14, 2026, recommends no advisory. |
| Louis Park boat ramp | The state's latest record, from Oct 14, 2026, recommends no advisory. |
| Between Dad's Point/Louis Park and Pershing Avenue, Stockton, CA | Caution advisory, last posted Jul 21, 2022. No all-clear recorded. |
| west end | Caution advisory, last posted Jul 9, 2021. No all-clear recorded. |
| at Yosemite Lake | Caution advisory, last posted Jul 9, 2021. No all-clear recorded. |
| Smith Canal at I-5 | Caution advisory, last posted Jul 23, 2020. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Smith Canal, 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 14, 2026 | near American Legion Park (SC) | None | Updates from routine monitoring program-organization |
| Oct 14, 2026 | Louis Park boat ramp | None | Updates from routine monitoring program-organization |
| Oct 1, 2026 | Louis Park boat ramp | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 25, 2026 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 25, 2026 | Louis Park boat ramp | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 22, 2026 | Louis Park boat ramp | Caution | Updates from routine monitoring program-organization; visual monitoring based advisory |
| Sep 2, 2026 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 2, 2026 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 2, 2026 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 30, 2026 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 30, 2026 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 2, 2026 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 2, 2026 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 11, 2026 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 11, 2026 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 20, 2026 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 20, 2026 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 2, 2025 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 2, 2025 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 2, 2025 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Oct 2, 2025 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 3, 2025 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 3, 2025 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 7, 2025 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 7, 2025 | Louis Park boat ramp | Danger | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jul 24, 2025 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 24, 2025 | Louis Park boat ramp | Warning | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Jul 2, 2025 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 2, 2025 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 5, 2025 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 5, 2025 | Louis Park boat ramp | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 25, 2024 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 23, 2024 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 26, 2024 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 20, 2024 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 16, 2024 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 29, 2023 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 24, 2023 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 24, 2023 | near American Legion Park (SC) | None | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 21, 2023 | near American Legion Park (SC) | None | Updates from routine monitoring program-organization |
| Jun 16, 2023 | near American Legion Park (SC) | None | Updates from routine monitoring program-organization |
| Sep 27, 2022 | near American Legion Park (SC) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 16, 2022 | near American Legion Park (SC) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Sep 13, 2022 | near American Legion Park (SC) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 26, 2022 | near American Legion Park (SC) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 24, 2022 | near American Legion Park (SC) | Caution | Advisory based on visual and toxins; Updates from routine monitoring program-organization |
| Aug 17, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| Aug 9, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| Jul 29, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| Jul 25, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| Jul 21, 2022 | Between Dad's Point/Louis Park and Pershing Avenue, Stockton, CA | Caution | visual monitoring based advisory |
| Jul 1, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| Jun 10, 2022 | near American Legion Park (SC) | Warning | Updates from routine monitoring program-organization |
| Jun 10, 2022 | near American Legion Park (SC) | Warning | Updates from routine monitoring program-organization |
| Jun 3, 2022 | near American Legion Park (SC) | Warning | Updates from routine monitoring program-organization |
| May 25, 2022 | near American Legion Park (SC) | Warning | Updates from routine monitoring program-organization |
| May 19, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| May 12, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| May 4, 2022 | near American Legion Park (SC) | Caution | Updates from routine monitoring program-organization |
| Jul 9, 2021 | west end | Caution | Advisory based on visual and toxins |
| Jul 9, 2021 | at Yosemite Lake | Caution | Advisory based on visual and toxins |
| Jul 23, 2020 | Smith Canal at I-5 | Caution | Advisory based on visual and toxins |
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.