What was found in ZIP 92154
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 | 2768.5 µg/L 28% of the EPA limit 10000 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 2/4 | SYR4 |
| Fluoride | 760 µg/L 19% of the EPA limit 4000 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 2/4 | SYR4 |
| Nitrate-Nitrite | 500 µg/L 5% of the EPA limit 10000 µg/L Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/4 | SYR4 |
| Chlorite | 452.8 µg/L 45% of the EPA limit 1000 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 1/4 | SYR4 |
| Barium | 135 µg/L 6.8% of the EPA limit 2000 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 180 µg/L — SWEETWATER AUTHORITY · 191,282 people · 2019 | 2/4 | SYR4 |
| Copper | 85.7 µg/L 6.6% of the EPA limit 1300 µg/L Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2019 | 1/4 | SYR4 |
| Combined Uranium | 71.52 µg/L 238% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 2/4 | SYR4 |
| Lithium | 65 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2023
Highest in the ZIP: 65.5 µg/L — CAL-AM WATER CORONADO · 106,000 people · 2023 | 4/4 | UCMR-5 |
| TTHM | 64.63 µg/L 81% of the EPA limit 80 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16.8 µg/L 28% of the EPA limit 60 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 32.1 µg/L — SWEETWATER AUTHORITY · 191,282 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 26.31 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 24.95 pCi/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 2/4 | SYR4 |
| Bromoform | 23.87 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 24.5 µg/L — CAL-AM WATER CORONADO · 106,000 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 18 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 4/4 | SYR4 |
| Chloroform | 15.2 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 15.5 µg/L — OTAY WATER DISTRICT · 238,008 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 8.929 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 15 µg/L — SWEETWATER AUTHORITY · 191,282 people · 2019 | 4/4 | SYR4 |
| Selenium | 6.7985 µg/L 14% of the EPA limit 50 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 14.85 µg/L — SWEETWATER AUTHORITY · 191,282 people · 2019 | 2/4 | SYR4 |
| Dibromoacetic Acid | 11.36 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 12.9 µg/L — CAL-AM WATER CORONADO · 106,000 people · 2019 | 4/4 | SYR4 |
| Bromate | 9.744 µg/L 97% of the EPA limit 10 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 1/4 | SYR4 |
| Monochloroacetic Acid | 2.5125 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 8.195 µg/L — CAL-AM WATER CORONADO · 106,000 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 4.5775 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 4/4 | SYR4 |
| Trichloroethylene | 4.5 µg/L 90% of the EPA limit 5 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 1/4 | SYR4 |
| Tetrachloroethylene | 4.335 µg/L 87% of the EPA limit 5 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 1/4 | SYR4 |
| Arsenic | 3.3 µg/L 33% of the EPA limit 10 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019
Highest in the ZIP: 3.87 µg/L — SWEETWATER AUTHORITY · 191,282 people · 2019 | 2/4 | SYR4 |
| Monobromoacetic Acid | 3.065 µg/L No EPA limit set Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 4/4 | SYR4 |
| Mercury | 1.9 µg/L 95% of the EPA limit 2 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 1/4 | SYR4 |
| cis-1,2-Dichloroethylene | 0.9525 µg/L 1.4% of the EPA limit 70 µg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2019 | 1/4 | SYR4 |
| Pfba | 0.0123 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| PFOA | 0.0114 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| PFBS | 0.0110 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| PFHXS | 0.0094 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| Pfhxa | 0.0086 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| Pfpea | 0.0076 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| PFOS | 0.0057 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| Pfhpa | 0.0047 µg/L No EPA limit set Highest in the ZIP: SWEETWATER AUTHORITY · 191,282 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SAN DIEGO, CITY OF · 1,385,379 people · 2023
Highest in the ZIP: 0.0020 mg/L — CAL-AM WATER CORONADO · 106,000 people · 2026 | 4/4 | 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 92154
| Supplier | State | Population served |
|---|---|---|
| SAN DIEGO, CITY OF | CA | 1,385,379 |
| OTAY WATER DISTRICT | CA | 238,008 |
| SWEETWATER AUTHORITY | CA | 191,282 |
| CAL-AM WATER CORONADO | CA | 106,000 |
Frequently asked questions about ZIP 92154 tap water
Is the tap water in ZIP 92154 safe to drink?
EPA testing detected 36 contaminants across the water suppliers serving ZIP 92154. 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 92154?
4 public water suppliers report EPA drinking-water monitoring for ZIP 92154. Each is listed above with its population served.
What contaminants are in ZIP 92154's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, Chlorite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.