Little Truckee River: toxic algae advisories
Little Truckee River, Nevada County. See all Nevada County waters.
What the state's records say
Caution advisory, last posted Sep 8, 2023. No all-clear recorded.
2 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 Little Truckee River
The state has an advisory on file for Little Truckee River (Caution advisory), last posted Sep 8, 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.
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 |
|---|---|
| Little Truckee River ~2.4mi below Worn Mill Cyn. | The state's latest record, from Sep 25, 2023, recommends no advisory. |
| Below Hwy 89 (636PS0246) | Algal mat alert sign, last posted Sep 8, 2023. No all-clear recorded. |
| Little Truckee River about 1-2 miles north of Boyingtom Mill Campground | The state's latest record, from Aug 5, 2022, recommends no advisory. |
| Boyington Mill Campground | Caution advisory, last posted Jul 28, 2022. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Little Truckee 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 |
|---|---|---|---|
| Sep 25, 2023 | Little Truckee River ~2.4mi below Worn Mill Cyn. | None | Testing results below posting triggers |
| Sep 8, 2023 | Below Hwy 89 (636PS0246) | Algal mat alert sign | Bottom/benthic bloom observed |
| Aug 5, 2022 | Little Truckee River about 1-2 miles north of Boyingtom Mill Campground | None | End date recorded: Dec 27, 2022. Testing results below posting triggers |
| Aug 5, 2022 | Little Truckee River about 1-2 miles north of Boyingtom Mill Campground | None | Testing results below posting triggers |
| Jul 28, 2022 | Boyington Mill Campground | 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.