Arroyo Valle: toxic algae advisories
Arroyo Valle, Alameda County. See all Alameda County waters.
What the state's records say
The state's latest record, from Mar 9, 2018, 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 Arroyo Valle
The state's latest record, from Mar 9, 2018, recommends no advisory. For Arroyo Valle, 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 |
|---|---|
| Arroyo Valle upstream of Shadow Cliffs Regional Park | The state's latest record, from Mar 9, 2018, recommends no advisory. |
| Arroyo Valle upstream of Shadow Cliffs Regional Park | The state's latest record, from Apr 11, 2017, recommends no advisory. |
Advisory history
Every advisory record the state has published for Arroyo Valle, 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 |
|---|---|---|---|
| Mar 9, 2018 | Arroyo Valle upstream of Shadow Cliffs Regional Park | None | |
| Apr 11, 2017 | Arroyo Valle upstream of Shadow Cliffs Regional Park | None |
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.