J.C. Boyle Reservoir: toxic algae advisories
J.C. Boyle Reservoir, Siskiyou County. See all Siskiyou County waters.
What the state's records say
The state's latest record, from Jun 17, 2021, recommends no advisory.
That reflects what the state knew on that date. It is not a finding that the water is safe now: blooms can return within days, and many are never reported.
Before you go, check the state's official algae page and any signs posted at the water.
Dogs at J.C. Boyle Reservoir
The state's latest record, from Jun 17, 2021, recommends no advisory. For J.C. Boyle Reservoir, that is not the same as an all-clear for today. Look at the water before your dog goes in: keep it out of green, blue-green or scummy water and away from mats on the shore.
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 |
|---|---|
| (RM 224.78) | Reports on file, with no advisory level the state has classified. |
| (RM 224.78) | Reports on file, with no advisory level the state has classified. |
| (RM 224.78) | The state's latest record, from Jun 17, 2021, recommends no advisory. |
Advisory history
Every advisory record the state has published for J.C. Boyle 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 |
|---|---|---|---|
| Oct 2, 2023 | (RM 224.78) | NA - refer to Report Details | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 21, 2023 | (RM 224.78) | NA - refer to Report Details | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 18, 2023 | (RM 224.78) | NA - refer to Report Details | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 31, 2023 | (RM 224.78) | NA - refer to Report Details | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jul 17, 2023 | (RM 224.78) | NA - refer to Report Details | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 30, 2023 | (RM 224.78) | NA - refer to Report Details | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Jun 13, 2023 | (RM 224.78) | NA - refer to Report Details | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 24, 2023 | (RM 224.78) | NA - refer to Report Details | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| May 8, 2023 | (RM 224.78) | NA - refer to Report Details | No cyano bloom w/testing; Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 28, 2022 | (RM 224.78) | NA - refer to Report Details | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Sep 28, 2022 | (RM 224.78) | NA - refer to Report Details | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 24, 2022 | (RM 224.78) | NA - refer to Report Details | Testing results below posting triggers; Updates from routine monitoring program-organization |
| Aug 10, 2022 | (RM 224.78) | NA - refer to Report Details | Updates from routine monitoring program-organization |
| Jul 28, 2022 | (RM 224.78) | NA - refer to Report Details | Updates from routine monitoring program-organization |
| Jul 19, 2022 | (RM 224.78) | NA - refer to Report Details | Updates from routine monitoring program-organization |
| Jul 1, 2022 | (RM 224.78) | NA - refer to Report Details | Updates from routine monitoring program-organization |
| May 26, 2022 | (RM 224.78) | NA - refer to Report Details | Updates from routine monitoring program-organization |
| Jun 17, 2021 | (RM 224.78) | None | Testing results below posting triggers |
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.