What was found in Covina's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 910000 µg/L 9100% of the EPA limit, in the worst sample — 10000 µg/L | 2/7 | SYR4 |
| Nitrate | 12000 µg/L 120% of the EPA limit, in the worst sample — 10000 µg/L | 3/7 | SYR4 |
| Fluoride | 590 µg/L 15% of the EPA limit 4000 µg/L | 4/7 | SYR4 |
| TTHM | 170 µg/L 213% of the EPA limit, in the worst sample — 80 µg/L | 7/7 | SYR4 |
| Barium | 150 µg/L 7.5% of the EPA limit 2000 µg/L | 3/7 | SYR4 |
| Chloroform | 83 µg/L No EPA limit set | 6/7 | SYR4 |
| Dibromochloromethane | 64 µg/L No EPA limit set | 7/7 | SYR4 |
| Total Haloacetic Acids (HAA5) | 62 µg/L 103% of the EPA limit, in the worst sample — 60 µg/L | 6/7 | SYR4 |
| Lithium | 54 µg/L No EPA limit set | 3/7 | UCMR-5 |
| Bromodichloromethane | 44 µg/L No EPA limit set | 7/7 | SYR4 |
| Bromoform | 40 µg/L No EPA limit set | 7/7 | SYR4 |
| Dichloroacetic Acid | 35 µg/L No EPA limit set | 5/7 | SYR4 |
| Dibromoacetic Acid | 28 µg/L No EPA limit set | 6/7 | SYR4 |
| Trichloroacetic Acid | 27 µg/L No EPA limit set | 5/7 | SYR4 |
| Chromium | 17 µg/L 17% of the EPA limit 100 µg/L | 1/7 | SYR4 |
| 1,1-Dichloroethylene | 16 µg/L 229% of the EPA limit, in the worst sample — 7 µg/L | 1/7 | SYR4 |
| Trichloroethylene | 14 µg/L 280% of the EPA limit, in the worst sample — 5 µg/L | 3/7 | SYR4 |
| Combined Uranium | 8.195 µg/L 27% of the EPA limit 30 µg/L | 4/7 | SYR4 |
| Tetrachloroethylene | 7.8 µg/L 156% of the EPA limit, in the worst sample — 5 µg/L | 3/7 | SYR4 |
| Monobromoacetic Acid | 6.7 µg/L No EPA limit set | 3/7 | SYR4 |
| Arsenic | 4.9 µg/L 49% of the EPA limit 10 µg/L | 4/7 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.8 µg/L 63% of the EPA limit 6 µg/L | 1/7 | SYR4 |
| Monochloroacetic Acid | 3.7 µg/L No EPA limit set | 1/7 | SYR4 |
| Chlorobenzene | 1.4 µg/L 1.4% of the EPA limit 100 µg/L | 1/7 | SYR4 |
| cis-1,2-Dichloroethylene | 1.4 µg/L 2% of the EPA limit 70 µg/L | 2/7 | SYR4 |
| trans-1,2-Dichloroethylene | 1.3 µg/L 1.3% of the EPA limit 100 µg/L | 1/7 | SYR4 |
| Carbon Tetrachloride | 0.6700 µg/L 13% of the EPA limit 5 µg/L | 1/7 | SYR4 |
| PFOS | 0.0160 µg/L No EPA limit set | 2/7 | UCMR-5 |
| Pfba | 0.0095 µg/L No EPA limit set | 3/7 | UCMR-5 |
| PFOA | 0.0070 µg/L No EPA limit set | 2/7 | UCMR-5 |
| PFBS | 0.0042 µg/L No EPA limit set | 3/7 | UCMR-5 |
| Pfpea | 0.0040 µg/L No EPA limit set | 3/7 | UCMR-5 |
| PFHXS | 0.0038 µg/L No EPA limit set | 1/7 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set | 2/7 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 7/7 | LCR |
Water suppliers serving Covina
| Supplier | Population served |
|---|---|
| SUBURBAN WATER SYSTEMS-SAN JOSE | 168,843 |
| SUBURBAN WATER SYSTEMS-WHITTIER | 66,045 |
| SUBURBAN WATER SYSTEMS-LA MIRADA | 56,793 |
| COVINA-CITY, WATER DEPT. | 33,300 |
| SUBURBAN WATER SYSTEMS-GLENDORA | 5,249 |
| SUBURBAN WATER SYSTEMS - SATIVA | 4,363 |
| SUBURBAN WATER SYSTEMS-COVINA KNOLLS | 1,437 |
Frequently asked questions about Covina tap water
Is Covina tap water safe to drink?
EPA testing detected 35 contaminants in the water serving Covina. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Covina?
7 public water suppliers report drinking-water monitoring for Covina, California to the EPA. Each is listed above with its population served.
What contaminants are in Covina's water?
The contaminants EPA monitoring detected in Covina include Nitrate-Nitrite, Nitrate, Fluoride, TTHM, Barium. The full list, with the highest level found and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.