San Luis Rey River estuary: toxic algae advisories
San Luis Rey River estuary, San Diego County. See all San Diego County waters.
What the state's records say
The state's latest record, from Aug 22, 2024, recommends no advisory.
Last advisory on file: Dec 2, 2022.
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 San Luis Rey River estuary
The state's latest record, from Aug 22, 2024, recommends no advisory. For San Luis Rey River estuary, 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 |
|---|---|
| San Luis Rey River estuary at the mouth | The state's latest record, from Aug 22, 2024, recommends no advisory. |
Advisory history
Every advisory record the state has published for San Luis Rey River estuary, 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 22, 2024 | San Luis Rey River estuary at the mouth | None | End date recorded: Sep 28, 2022. Testing results below posting triggers |
| Jun 19, 2024 | San Luis Rey River estuary at the mouth | None | End date recorded: Sep 28, 2022. Testing results below posting triggers |
| May 14, 2024 | San Luis Rey River estuary at the mouth | None | End date recorded: Sep 28, 2022. No cyano, other algae present. |
| May 7, 2024 | San Luis Rey River estuary at the mouth | None | End date recorded: Sep 28, 2022. No cyano, other algae present. |
| Dec 2, 2022 | San Luis Rey River estuary at the mouth | Caution | End date recorded: Sep 28, 2022. Advisory based on visual and toxins |
| Nov 18, 2022 | San Luis Rey River estuary at the mouth | Caution | End date recorded: Sep 28, 2022. Advisory based on visual and toxins |
| Oct 18, 2022 | San Luis Rey River estuary at the mouth | Caution | End date recorded: Sep 28, 2022. Advisory based on visual and toxins |
| Sep 28, 2022 | San Luis Rey River estuary at the mouth | None | End date recorded: Sep 28, 2022. De-posting advisory. |
| Sep 28, 2022 | San Luis Rey River estuary at the mouth | None | De-posting advisory. |
| Sep 22, 2022 | San Luis Rey River estuary at the mouth | Algal mat alert sign | Advisory based on visual and toxins |
| Sep 2, 2022 | San Luis Rey River estuary at the mouth | Caution | Advisory based on visual and toxins |
| Sep 2, 2022 | San Luis Rey River estuary at the mouth | Caution | Advisory based on visual and toxins |
| Aug 25, 2022 | San Luis Rey River estuary at the mouth | Algal mat alert sign | Bottom/benthic bloom observed; Under investigation |
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.