What was found in ZIP 92878
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 | 17000 µg/L 170% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 15600 µg/L 156% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Fluoride | 820 µg/L 21% of the EPA limit 4000 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Barium | 364.5 µg/L 18% of the EPA limit 2000 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Lithium | 55.1 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2024 | 1/1 | UCMR-5 |
| TTHM | 36 µg/L 45% of the EPA limit 80 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 30.0235 µg/L 100% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Selenium | 29.3 µg/L 59% of the EPA limit 50 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Arsenic | 14.1 µg/L 141% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14 µg/L 23% of the EPA limit 60 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Bromoform | 11.55 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Chloroform | 11 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 11 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 10 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 6.985 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 5.765 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 4.5 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 4.3 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Chromium | 3.8 µg/L 3.8% of the EPA limit 100 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 1.845 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Trichloroethylene | 1.765 µg/L 35% of the EPA limit 5 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Tetrachloroethylene | 0.9460 µg/L 19% of the EPA limit 5 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0420 µg/L 21% of the EPA limit 0.2000 µg/L Main supplier: CORONA, CITY OF · 168,575 people · 2019 | 1/1 | SYR4 |
| Pfba | 0.0076 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2024 | 1/1 | UCMR-5 |
| Pfpea | 0.0061 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0038 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0037 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: CORONA, CITY OF · 168,575 people · 2023 | 1/1 | LCR |
| PFHXS | 0.0033 µg/L No EPA limit set Main supplier: CORONA, CITY OF · 168,575 people · 2024 | 1/1 | UCMR-5 |
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 92878
| Supplier | State | Population served |
|---|---|---|
| CORONA, CITY OF | CA | 168,575 |
Frequently asked questions about ZIP 92878 tap water
Is the tap water in ZIP 92878 safe to drink?
EPA testing detected 28 contaminants across the water suppliers serving ZIP 92878. 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 92878?
1 public water supplier report EPA drinking-water monitoring for ZIP 92878. Each is listed above with its population served.
What contaminants are in ZIP 92878's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.