What was found in ZIP 92320
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-Nitrite | 594999.9999999998 µg/L 5950% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 2/3 | SYR4 |
| Nitrate | 9000 µg/L 90% of the EPA limit 10000 µg/L Highest in the ZIP: SOUTH MESA WC · 10,108 people · 2019 | 2/3 | SYR4 |
| Fluoride | 2075 µg/L 52% of the EPA limit 4000 µg/L Highest in the ZIP: SOUTH MESA WC · 10,108 people · 2019 | 2/3 | SYR4 |
| Copper | 274.49999999999994 µg/L 21% of the EPA limit 1300 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| Barium | 118.5 µg/L 5.9% of the EPA limit 2000 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| TTHM | 32.72 µg/L 41% of the EPA limit 80 µg/L Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 90.08499999999998 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 3/3 | SYR4 |
| Bromoform | 15.52 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 37.404999999999994 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 12.079999999999995 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 34.655 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 32.3 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019 | 2/3 | SYR4 |
| Chloroform | 5.134999999999999 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 27.65 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.625 µg/L 18% of the EPA limit 60 µg/L Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 25.15 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 5.8 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 22.009999999999998 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 3/3 | SYR4 |
| Lithium | 17.9 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2024 | 1/3 | UCMR-5 |
| Trichloroacetic Acid | 2.2 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 12.95 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 4.130000000000001 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 12.549999999999997 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 6.284999999999999 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019
Highest in the ZIP: 12.5 µg/L — YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 3/3 | SYR4 |
| Arsenic | 9.95 µg/L 99% of the EPA limit 10 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 2/3 | SYR4 |
| Lead | 8.2 µg/L 55% of the EPA limit 15 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| Selenium | 5.5 µg/L 11% of the EPA limit 50 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 5.386349999999998 µg/L 18% of the EPA limit 30 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2017 | 2/3 | SYR4 |
| Chromium | 2.4 µg/L 2.4% of the EPA limit 100 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.8 µg/L No EPA limit set Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2019 | 2/3 | SYR4 |
| 1,1-Dichloroethylene | 1.17 µg/L 17% of the EPA limit 7 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 1.1 µg/L 55% of the EPA limit 2 µg/L Highest in the ZIP: SOUTH MESA WC · 10,108 people · 2019 | 1/3 | SYR4 |
| 1,1,1-Trichloroethane | 0.6045 µg/L 0.3% of the EPA limit 200 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| Tetrachloroethylene | 0.6000 µg/L 12% of the EPA limit 5 µg/L Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2019 | 1/3 | SYR4 |
| PFBS | 0.0100 µg/L No EPA limit set Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2024 | 2/3 | UCMR-5 |
| Pfpea | 0.0089 µg/L No EPA limit set Highest in the ZIP: SOUTH MESA WC · 10,108 people · 2023 | 2/3 | UCMR-5 |
| Pfhxa | 0.0071 µg/L No EPA limit set Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2024 | 2/3 | UCMR-5 |
| PFOA | 0.0042 µg/L No EPA limit set Highest in the ZIP: YUCAIPA VALLEY WATER DISTRICT · 52,010 people · 2024 | 1/3 | UCMR-5 |
| PFHXS | 0.0035 µg/L No EPA limit set Highest in the ZIP: SOUTH MESA WC · 10,108 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: CAL AMERICAN WATER CO · 66,809 people · 2024 | 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 92320
| Supplier | State | Population served |
|---|---|---|
| CAL AMERICAN WATER CO | CA | 66,809 |
| YUCAIPA VALLEY WATER DISTRICT | CA | 52,010 |
| SOUTH MESA WC | CA | 10,108 |
Frequently asked questions about ZIP 92320 tap water
Is the tap water in ZIP 92320 safe to drink?
EPA testing detected 32 contaminants across the water suppliers serving ZIP 92320. 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 92320?
3 public water suppliers report EPA drinking-water monitoring for ZIP 92320. Each is listed above with its population served.
What contaminants are in ZIP 92320's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.