What was found in ZIP 92679
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 | 950000 µg/L 9500% of the EPA limit, in the worst sample — 10000 µg/L | 2/4 | SYR4 |
| Nitrate | 14012 µg/L 140% of the EPA limit, in the worst sample — 10000 µg/L | 3/4 | SYR4 |
| Fluoride | 1580 µg/L 40% of the EPA limit 4000 µg/L | 2/4 | SYR4 |
| Nitrite | 550 µg/L 55% of the EPA limit 1000 µg/L | 1/4 | SYR4 |
| Copper | 399 µg/L 31% of the EPA limit 1300 µg/L | 1/4 | SYR4 |
| Barium | 147 µg/L 7.4% of the EPA limit 2000 µg/L | 2/4 | SYR4 |
| TTHM | 133 µg/L 166% of the EPA limit, in the worst sample — 80 µg/L | 4/4 | SYR4 |
| Lead | 123 µg/L 820% of the EPA limit, in the worst sample — 15 µg/L | 1/4 | SYR4 |
| Chloroform | 97 µg/L No EPA limit set | 3/4 | SYR4 |
| Lithium | 67.2 µg/L No EPA limit set | 3/4 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 49 µg/L 82% of the EPA limit 60 µg/L | 3/4 | SYR4 |
| Dibromochloromethane | 31.7 µg/L No EPA limit set | 3/4 | SYR4 |
| Bromodichloromethane | 30.4 µg/L No EPA limit set | 3/4 | SYR4 |
| Dichloroacetic Acid | 27 µg/L No EPA limit set | 3/4 | SYR4 |
| Bromoform | 25 µg/L No EPA limit set | 4/4 | SYR4 |
| Trichloroacetic Acid | 24.1 µg/L No EPA limit set | 3/4 | SYR4 |
| Xylenes, Total | 22.4 µg/L 0.2% of the EPA limit 10000 µg/L | 1/4 | SYR4 |
| Selenium | 21.5 µg/L 43% of the EPA limit 50 µg/L | 2/4 | SYR4 |
| Combined Uranium | 16.688 µg/L 56% of the EPA limit 30 µg/L | 2/4 | SYR4 |
| Arsenic | 10.8 µg/L 108% of the EPA limit, in the worst sample — 10 µg/L | 1/4 | SYR4 |
| Dibromoacetic Acid | 10 µg/L No EPA limit set | 3/4 | SYR4 |
| Ethylbenzene | 9.05 µg/L 1.3% of the EPA limit 700 µg/L | 1/4 | SYR4 |
| Gross Beta Particle Activity | 5.8 pCi/L No EPA limit set | 2/4 | SYR4 |
| Monobromoacetic Acid | 5.36 µg/L No EPA limit set | 3/4 | SYR4 |
| Monochloroacetic Acid | 5.09 µg/L No EPA limit set | 2/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.4 pCi/L 29% of the EPA limit 15 pCi/L | 1/4 | SYR4 |
| Chromium | 2.15 µg/L 2.2% of the EPA limit 100 µg/L | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 0.6730 pCi/L 13% of the EPA limit 5 pCi/L | 1/4 | SYR4 |
| Tetrachloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L | 1/4 | SYR4 |
| Lead | 0.0107 mg/L 72% of the EPA limit 0.0150 mg/L | 4/4 | LCR |
| Pfba | 0.0079 µg/L No EPA limit set | 1/4 | UCMR-5 |
| Pfpea | 0.0038 µg/L No EPA limit set | 1/4 | UCMR-5 |
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 92679
| Supplier | State | Population served |
|---|---|---|
| IRVINE RANCH WATER DISTRICT | CA | 444,800 |
| SANTA MARGARITA WATER DISTRICT | CA | 168,289 |
| TRABUCO CANYON WATER DISTRICT | CA | 13,659 |
| KOHALA RANCH WATER CO. | HI | 850 |
Frequently asked questions about ZIP 92679 tap water
Is the tap water in ZIP 92679 safe to drink?
EPA testing detected 32 contaminants across the water suppliers serving ZIP 92679. 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 92679?
4 public water suppliers report EPA drinking-water monitoring for ZIP 92679. Each is listed above with its population served.
What contaminants are in ZIP 92679's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Nitrite, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.