North Beach-Keller Beach (Contra Costa Co)
east bay Unsafe
Recent sample exceeded bacteria thresholds.
Last sampled: Apr 20, 2026 (16 days ago)
0.30 in of rain in the last 72 hours may have changed water quality since the last sample was taken.
Map
Recent Rainfall
48h rain (advisory ≥ 1.00 in) 0.00 in
72h rain (advisory ≥ 0.50 in) 0.30 in
Bacteria Readings
| Indicator | Latest | 30-day geomean | EPA limit |
|---|---|---|---|
| Enterococcus | 290 MPN/100mL | 69 MPN/100mL | ≤104 / geomean ≤35 |
90-Day Enterococcus History
Showing the indicator with the most recent readings; agencies sometimes switch which one they report.
Safe Caution Unsafe Unknown
Nearby Swim Spots
Data from: California Safe-to-Swim (ODbL 1.0), Open-Meteo — Precipitation (CC-BY 4.0)