What was found in ZIP 91104
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 900000 µg/L 9000% of the EPA limit, in the worst sample — 10000 µg/L | 2/2 | SYR4 |
| Nitrate | 13200 µg/L 132% of the EPA limit, in the worst sample — 10000 µg/L | 2/2 | SYR4 |
| Fluoride | 3500 µg/L 88% of the EPA limit 4000 µg/L | 2/2 | SYR4 |
| Barium | 170 µg/L 8.5% of the EPA limit 2000 µg/L | 1/2 | SYR4 |
| TTHM | 118 µg/L 148% of the EPA limit, in the worst sample — 80 µg/L | 2/2 | SYR4 |
| Copper | 73 µg/L 5.6% of the EPA limit 1300 µg/L | 1/2 | SYR4 |
| Lithium | 64.2 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Chloroform | 44.5 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromodichloromethane | 37.9 µg/L No EPA limit set | 2/2 | SYR4 |
| Combined Uranium | 37.25 µg/L 124% of the EPA limit, in the worst sample — 30 µg/L | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 34 µg/L 57% of the EPA limit 60 µg/L | 2/2 | SYR4 |
| Dibromochloromethane | 31 µg/L No EPA limit set | 2/2 | SYR4 |
| Trichloroethylene | 31 µg/L 620% of the EPA limit, in the worst sample — 5 µg/L | 1/2 | SYR4 |
| cis-1,2-Dichloroethylene | 20.7 µg/L 30% of the EPA limit 70 µg/L | 1/2 | SYR4 |
| Bromoform | 18.2 µg/L No EPA limit set | 2/2 | SYR4 |
| Dichloroacetic Acid | 17 µg/L No EPA limit set | 2/2 | SYR4 |
| Tetrachloroethylene | 13.8 µg/L 276% of the EPA limit, in the worst sample — 5 µg/L | 2/2 | SYR4 |
| Trichloroacetic Acid | 11 µg/L No EPA limit set | 2/2 | SYR4 |
| Dibromoacetic Acid | 9 µg/L No EPA limit set | 2/2 | SYR4 |
| trans-1,2-Dichloroethylene | 4.2 µg/L 4.2% of the EPA limit 100 µg/L | 1/2 | SYR4 |
| Carbon Tetrachloride | 4.01 µg/L 80% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.7 µg/L 62% of the EPA limit 6 µg/L | 1/2 | SYR4 |
| Monochloroacetic Acid | 3.2 µg/L No EPA limit set | 1/2 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.3 µg/L No EPA limit set | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 0.9100 µg/L 13% of the EPA limit 7 µg/L | 1/2 | SYR4 |
| Toluene | 0.6000 µg/L 0.1% of the EPA limit 1000 µg/L | 1/2 | SYR4 |
| Dichloromethane | 0.5400 µg/L 11% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| PFOS | 0.0190 µg/L No EPA limit set | 1/2 | UCMR-5 |
| PFHXS | 0.0110 µg/L No EPA limit set | 1/2 | UCMR-5 |
| PFOA | 0.0085 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Pfba | 0.0057 µg/L No EPA limit set | 1/2 | UCMR-5 |
| PFBS | 0.0035 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Pfpea | 0.0035 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Pfhxa | 0.0031 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 91104
| Supplier | State | Population served |
|---|---|---|
| PASADENA WATER AND POWER | CA | 164,344 |
| RUBIO CANON LAND & WATER ASSOCIATION | CA | 9,215 |
Frequently asked questions about ZIP 91104 tap water
Is the tap water in ZIP 91104 safe to drink?
EPA testing detected 36 contaminants across the water suppliers serving ZIP 91104. 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 91104?
2 public water suppliers report EPA drinking-water monitoring for ZIP 91104. Each is listed above with its population served.
What contaminants are in ZIP 91104's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.