West Walker River: toxic algae advisories
West Walker River, Mono County. See all Mono County waters.
What the state's records say
Caution advisory, last posted Aug 21, 2025. No all-clear recorded.
3 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 West Walker River
The state has an advisory on file for West Walker River (Caution advisory), last posted Aug 21, 2025, 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 upper Leavitt creek and Rd. 108 (631WWK005) | Algal mat alert sign, last posted Aug 21, 2025. No all-clear recorded. |
| Settelmeyer and hey 395 (631WWK002) | Algal mat alert sign, last posted Aug 21, 2025. No all-clear recorded. |
| trail crossing in Lower Paiute Meadow, Hoover Wilderness | Caution advisory, last posted Sep 30, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for West Walker 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 |
|---|---|---|---|
| Aug 21, 2025 | near upper Leavitt creek and Rd. 108 (631WWK005) | Algal mat alert sign | Updates from routine monitoring program-organization |
| Aug 21, 2025 | Settelmeyer and hey 395 (631WWK002) | Algal mat alert sign | Updates from routine monitoring program-organization |
| Sep 30, 2021 | trail crossing in Lower Paiute Meadow, Hoover Wilderness | Caution | visual monitoring based advisory |
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.