Trinity River: toxic algae advisories
Trinity River, Trinity County. See all Trinity County waters.
What the state's records say
Caution advisory, last posted Aug 9, 2021. No all-clear recorded.
19 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 Trinity River
The state has an advisory on file for Trinity River (Caution advisory), last posted Aug 9, 2021, 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 |
|---|---|
| at Pigeon Point | Algal mat alert sign, last posted Aug 9, 2021. No all-clear recorded. |
| near Trinity Village | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Swede Creek | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Skunk Point | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Sheridan Creek | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Sandy Bar Creek | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Prairie Creek Road | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Little French Creek | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Francis B. Matthews Rest Area | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Del Loma | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| near Cedar Flat | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| below Junction City | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| below Coopers Bar | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| at Tonys Point | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| at Shasta-Trinity Picnic Area | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| along Highway 299 | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| above North Fork Confluence | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| above Big Flat | Algal mat alert sign, last posted Jul 27, 2021. No all-clear recorded. |
| east of south fork | Caution advisory, last posted Jul 15, 2021. No all-clear recorded. |
Advisory history
Every advisory record the state has published for Trinity 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 9, 2021 | at Pigeon Point | Algal mat alert sign | |
| Jul 27, 2021 | near Trinity Village | Algal mat alert sign | |
| Jul 27, 2021 | near Swede Creek | Algal mat alert sign | |
| Jul 27, 2021 | near Skunk Point | Algal mat alert sign | |
| Jul 27, 2021 | near Sheridan Creek | Algal mat alert sign | |
| Jul 27, 2021 | near Sandy Bar Creek | Algal mat alert sign | |
| Jul 27, 2021 | near Prairie Creek Road | Algal mat alert sign | |
| Jul 27, 2021 | near Little French Creek | Algal mat alert sign | |
| Jul 27, 2021 | near Francis B. Matthews Rest Area | Algal mat alert sign | |
| Jul 27, 2021 | near Del Loma | Algal mat alert sign | |
| Jul 27, 2021 | near Cedar Flat | Algal mat alert sign | |
| Jul 27, 2021 | below Junction City | Algal mat alert sign | |
| Jul 27, 2021 | below Coopers Bar | Algal mat alert sign | |
| Jul 27, 2021 | at Tonys Point | Algal mat alert sign | |
| Jul 27, 2021 | at Shasta-Trinity Picnic Area | Algal mat alert sign | |
| Jul 27, 2021 | along Highway 299 | Algal mat alert sign | |
| Jul 27, 2021 | above North Fork Confluence | Algal mat alert sign | |
| Jul 27, 2021 | above Big Flat | Algal mat alert sign | Suspected illness reported |
| Jul 15, 2021 | east of south fork | 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.