What was found in Pasadena'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 | 37300 µg/L 373% of the EPA limit, in the worst sample — 10000 µg/L | 4/6 | SYR4 |
| Fluoride | 3300 µg/L 83% of the EPA limit 4000 µg/L | 5/6 | SYR4 |
| Nitrate-Nitrite | 1600 µg/L 16% of the EPA limit 10000 µg/L | 1/6 | SYR4 |
| Barium | 440 µg/L 22% of the EPA limit 2000 µg/L | 2/6 | SYR4 |
| Copper | 230 µg/L 18% of the EPA limit 1300 µg/L | 2/6 | SYR4 |
| Lead | 220 µg/L 1467% of the EPA limit, in the worst sample — 15 µg/L | 2/6 | SYR4 |
| Arsenic | 140 µg/L 1400% of the EPA limit, in the worst sample — 10 µg/L | 5/6 | SYR4 |
| Combined Uranium | 134.547 µg/L 448% of the EPA limit, in the worst sample — 30 µg/L | 4/6 | SYR4 |
| TTHM | 118 µg/L 148% of the EPA limit, in the worst sample — 80 µg/L | 6/6 | SYR4 |
| Toluene | 72 µg/L 7.2% of the EPA limit 1000 µg/L | 2/6 | SYR4 |
| Lithium | 64.2 µg/L No EPA limit set | 1/6 | UCMR-5 |
| Chloroform | 44.5 µg/L No EPA limit set | 6/6 | SYR4 |
| Bromodichloromethane | 37.9 µg/L No EPA limit set | 6/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 34 µg/L 57% of the EPA limit 60 µg/L | 6/6 | SYR4 |
| Dibromochloromethane | 31 µg/L No EPA limit set | 5/6 | SYR4 |
| Trichloroethylene | 31 µg/L 620% of the EPA limit, in the worst sample — 5 µg/L | 2/6 | SYR4 |
| cis-1,2-Dichloroethylene | 20.7 µg/L 30% of the EPA limit 70 µg/L | 1/6 | SYR4 |
| Bromoform | 18.2 µg/L No EPA limit set | 4/6 | SYR4 |
| Dichloroacetic Acid | 17 µg/L No EPA limit set | 6/6 | SYR4 |
| Tetrachloroethylene | 13.8 µg/L 276% of the EPA limit, in the worst sample — 5 µg/L | 2/6 | SYR4 |
| Chromium | 12 µg/L 12% of the EPA limit 100 µg/L | 3/6 | SYR4 |
| Trichloroacetic Acid | 11 µg/L No EPA limit set | 5/6 | SYR4 |
| Dibromoacetic Acid | 9 µg/L No EPA limit set | 4/6 | SYR4 |
| trans-1,2-Dichloroethylene | 4.2 µg/L 4.2% of the EPA limit 100 µg/L | 1/6 | SYR4 |
| Carbon Tetrachloride | 4.01 µg/L 80% of the EPA limit 5 µg/L | 2/6 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.7 µg/L 62% of the EPA limit 6 µg/L | 1/6 | SYR4 |
| Monochloroacetic Acid | 3.2 µg/L No EPA limit set | 1/6 | SYR4 |
| Monobromoacetic Acid | 1.3 µg/L No EPA limit set | 2/6 | SYR4 |
| 1,1-Dichloroethylene | 0.9100 µg/L 13% of the EPA limit 7 µg/L | 1/6 | SYR4 |
| Dichloromethane | 0.5400 µg/L 11% of the EPA limit 5 µg/L | 1/6 | SYR4 |
| Xylenes, Total | 0.0800 µg/L 0% of the EPA limit 10000 µg/L | 1/6 | SYR4 |
| Lead | 0.0194 mg/L 129% above the EPA limit of 0.0150 mg/L | 6/6 | LCR |
Water suppliers serving Pasadena
| Supplier | Population served |
|---|---|
| PASADENA WATER AND POWER | 164,344 |
| SUNNY SLOPE WATER CO. | 25,252 |
| KINNELOA IRRIGATION DIST. | 1,960 |
| LAKE MORENA VIEWS MWC | 360 |
| ACORN VILLAGE MOBILE HOME PARK | 192 |
| TOLAS WATERWORKS CO OP | 190 |
Frequently asked questions about Pasadena tap water
Is Pasadena tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Pasadena. 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 Pasadena?
6 public water suppliers report drinking-water monitoring for Pasadena, California to the EPA. Each is listed above with its population served.
What contaminants are in Pasadena's water?
The contaminants EPA monitoring detected in Pasadena include Nitrate, Fluoride, Nitrate-Nitrite, Barium, Copper. 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.