What was found in ZIP 94030
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 286420 µg/L 2864% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| Nitrate | 21400 µg/L 214% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| Fluoride | 819.5 µg/L 20% of the EPA limit 4000 µg/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| Nitrite | 400 µg/L 40% of the EPA limit 1000 µg/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| Barium | 166.8 µg/L 8.3% of the EPA limit 2000 µg/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| TTHM | 65.79 µg/L 82% of the EPA limit 80 µg/L Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 2/2 | SYR4 |
| Chloroform | 61.67 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 45.625 µg/L 76% of the EPA limit 60 µg/L Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 1/2 | SYR4 |
| Chromium | 25.78 µg/L 26% of the EPA limit 100 µg/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 23.575 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 22.7 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 8.0135 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 5.235 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 3.8 pCi/L 76% of the EPA limit 5 pCi/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 3.075 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 1/2 | SYR4 |
| Arsenic | 2.976 µg/L 30% of the EPA limit 10 µg/L Highest in the ZIP: SAN FRANCISCO REGIONAL WATER SYSTEM · 600 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.9 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 1/2 | SYR4 |
| Bromoform | 1.16 µg/L No EPA limit set Main supplier: CITY OF MILLBRAE · 22,795 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF MILLBRAE · 22,795 people · 2025 | 2/2 | 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 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
Water suppliers serving ZIP 94030
| Supplier | State | Population served |
|---|---|---|
| CITY OF MILLBRAE | CA | 22,795 |
| SAN FRANCISCO REGIONAL WATER SYSTEM | CA | 600 |
Frequently asked questions about ZIP 94030 tap water
Is the tap water in ZIP 94030 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 94030. 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 94030?
2 public water suppliers report EPA drinking-water monitoring for ZIP 94030. Each is listed above with its population served.
What contaminants are in ZIP 94030's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Nitrite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.