What was found in ZIP 91011
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 | 13108 µg/L 131% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the ZIP: VALLEY WATER CO. · 10,070 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 11050 µg/L 111% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the ZIP: VALLEY WATER CO. · 10,070 people · 2019 | 2/3 | SYR4 |
| Fluoride | 385 µg/L 9.6% of the EPA limit 4000 µg/L Highest in the ZIP: LA CANADA IRRIGATION DIST. · 9,300 people · 2019 | 2/3 | SYR4 |
| Barium | 180 µg/L 9% of the EPA limit 2000 µg/L Highest in the ZIP: VALLEY WATER CO. · 10,070 people · 2017 | 2/3 | SYR4 |
| TTHM | 82.9 µg/L 104% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Lithium | 45 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023
Highest in the ZIP: 65.7 µg/L — VALLEY WATER CO. · 10,070 people · 2024 | 3/3 | UCMR-5 |
| Copper | 59.75 µg/L 4.6% of the EPA limit 1300 µg/L Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 30 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 27 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 25 µg/L 42% of the EPA limit 60 µg/L Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Chloroform | 24.55 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Bromoform | 14.9 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 12.9481 µg/L 43% of the EPA limit 30 µg/L Highest in the ZIP: VALLEY WATER CO. · 10,070 people · 2017 | 2/3 | SYR4 |
| Dichloroacetic Acid | 9.9 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019
Highest in the ZIP: 11.285 µg/L — LA CANADA IRRIGATION DIST. · 9,300 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 10 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 9 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Lead | 5.75 µg/L 38% of the EPA limit 15 µg/L Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019
Highest in the ZIP: 6.6 µg/L — LA CANADA IRRIGATION DIST. · 9,300 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 6.225 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2019 | 3/3 | SYR4 |
| Arsenic | 5.77 µg/L 58% of the EPA limit 10 µg/L Highest in the ZIP: LA CANADA IRRIGATION DIST. · 9,300 people · 2019 | 1/3 | SYR4 |
| Tetrachloroethylene | 3.12 µg/L 62% of the EPA limit 5 µg/L Highest in the ZIP: VALLEY WATER CO. · 10,070 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 2.98 µg/L No EPA limit set Highest in the ZIP: LA CANADA IRRIGATION DIST. · 9,300 people · 2019 | 2/3 | SYR4 |
| Trichloroethylene | 2.2 µg/L 44% of the EPA limit 5 µg/L Highest in the ZIP: LA CANADA IRRIGATION DIST. · 9,300 people · 2019 | 2/3 | SYR4 |
| Mercury | 1.4 µg/L 70% of the EPA limit 2 µg/L Highest in the ZIP: VALLEY WATER CO. · 10,070 people · 2017 | 1/3 | SYR4 |
| Pfhxa | 0.0080 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023 | 1/3 | UCMR-5 |
| Pfpea | 0.0080 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023 | 1/3 | UCMR-5 |
| PFBS | 0.0068 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023 | 1/3 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023 | 1/3 | UCMR-5 |
| PFHXS | 0.0049 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023 | 1/3 | UCMR-5 |
| Pfhpa | 0.0031 µg/L No EPA limit set Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CRESCENTA VALLEY CWD · 35,841 people · 2023 | 3/3 | 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 91011
| Supplier | State | Population served |
|---|---|---|
| CRESCENTA VALLEY CWD | CA | 35,841 |
| VALLEY WATER CO. | CA | 10,070 |
| LA CANADA IRRIGATION DIST. | CA | 9,300 |
Frequently asked questions about ZIP 91011 tap water
Is the tap water in ZIP 91011 safe to drink?
EPA testing detected 30 contaminants across the water suppliers serving ZIP 91011. 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 91011?
3 public water suppliers report EPA drinking-water monitoring for ZIP 91011. Each is listed above with its population served.
What contaminants are in ZIP 91011's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.