What was found in ZIP 94904
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 700000 µg/L 7000% of the EPA limit, in the worst sample — 10000 µg/L | 1/1 | SYR4 |
| Fluoride | 1020 µg/L 26% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Nitrate | 700.6 µg/L 7% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrite | 400 µg/L 40% of the EPA limit 1000 µg/L | 1/1 | SYR4 |
| Copper | 121 µg/L 9.3% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Barium | 100 µg/L 5% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 99.2 µg/L 165% of the EPA limit, in the worst sample — 60 µg/L | 1/1 | SYR4 |
| TTHM | 86.2 µg/L 108% of the EPA limit, in the worst sample — 80 µg/L | 1/1 | SYR4 |
| Chloroform | 68.4 µg/L No EPA limit set | 1/1 | SYR4 |
| Dichloroacetic Acid | 57.4 µg/L No EPA limit set | 1/1 | SYR4 |
| Trichloroacetic Acid | 40.6 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromodichloromethane | 16.2 µg/L No EPA limit set | 1/1 | SYR4 |
| Dibromochloromethane | 10.8 µg/L No EPA limit set | 1/1 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L | 1/1 | SYR4 |
| Dibromoacetic Acid | 6.4 µg/L No EPA limit set | 1/1 | SYR4 |
| Monochloroacetic Acid | 3.7 µg/L No EPA limit set | 1/1 | SYR4 |
| Bromoform | 2.9 µg/L No EPA limit set | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 1/1 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 94904
| Supplier | State | Population served |
|---|---|---|
| MARIN MUNICIPAL WATER DISTRICT | CA | 186,895 |
Frequently asked questions about ZIP 94904 tap water
Is the tap water in ZIP 94904 safe to drink?
EPA testing detected 18 contaminants across the water suppliers serving ZIP 94904. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 94904?
1 public water supplier report EPA drinking-water monitoring for ZIP 94904. Each is listed above with its population served.
What contaminants are in ZIP 94904's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Nitrate, Nitrite, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.