What was found in ZIP 94015
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 | 16000 µg/L 160% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 7325 µg/L 73% of the EPA limit 10000 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Barium | 180 µg/L 9% of the EPA limit 2000 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Fluoride | 167.99999999999983 µg/L 4.2% of the EPA limit 4000 µg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| TTHM | 59.762499999999996 µg/L 75% of the EPA limit 80 µg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Chloroform | 57.96249999999999 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 54.725 µg/L 91% of the EPA limit 60 µg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Copper | 52.3142 µg/L 4% of the EPA limit 1300 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 32.08 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 24.734999999999985 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Lithium | 13 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2023
Highest in the ZIP: 23.6 µg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2025 | 2/2 | UCMR-5 |
| Chromium | 18 µg/L 18% of the EPA limit 100 µg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2.95 µg/L 30% of the EPA limit 10 µg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2019
Highest in the ZIP: 9.81355 µg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 4.4075 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019
Highest in the ZIP: 4.575499999999998 µg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 2/2 | SYR4 |
| Bromoform | 2.83 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019
Highest in the ZIP: 3.3559999999999994 µg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 2.9999999999999996 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019
Highest in the ZIP: 3.098 µg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 2.1099999999999994 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019
Highest in the ZIP: 3.005 µg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 2/2 | SYR4 |
| Lead | 2.9948999999999995 µg/L 20% of the EPA limit 15 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Diquat | 2.2 µg/L 11% of the EPA limit 20 µg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 2.0895 µg/L 7% of the EPA limit 30 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Selenium | 1.5479000000000005 µg/L 3.1% of the EPA limit 50 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 1.27 pCi/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: CITY OF DALY CITY · 104,901 people · 2019
Highest in the ZIP: 1.2 µg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 2/2 | SYR4 |
| 1,2-Dichloropropane | 1.015 µg/L 20% of the EPA limit 5 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Trichloroethylene | 0.7370 µg/L 15% of the EPA limit 5 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 0.1208 µg/L 2% of the EPA limit 6 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 0.0224 µg/L 1.1% of the EPA limit 2 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Cadmium | 0.0135 µg/L 0.3% of the EPA limit 5 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Mercury | 0.0130 µg/L 0.7% of the EPA limit 2 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Beryllium, Total | 0.0078 µg/L 0.2% of the EPA limit 4 µg/L Highest in the ZIP: CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF DALY CITY · 104,901 people · 2025
Highest in the ZIP: 0.0041 mg/L — CALIFORNIA WATER SERVICE-S SAN FRANCISCO · 64,146 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 94015
| Supplier | State | Population served |
|---|---|---|
| CITY OF DALY CITY | CA | 104,901 |
| CALIFORNIA WATER SERVICE-S SAN FRANCISCO | CA | 64,146 |
Frequently asked questions about ZIP 94015 tap water
Is the tap water in ZIP 94015 safe to drink?
EPA testing detected 32 contaminants across the water suppliers serving ZIP 94015. 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 94015?
2 public water suppliers report EPA drinking-water monitoring for ZIP 94015. Each is listed above with its population served.
What contaminants are in ZIP 94015's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Barium, Fluoride, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.