What was found in ZIP 99362
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 | 2775 µg/L 28% of the EPA limit 10000 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 1175 µg/L 12% of the EPA limit 10000 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 1/2 | SYR4 |
| Fluoride | 228 µg/L 5.7% of the EPA limit 4000 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019
Highest in the ZIP: 605 µg/L — COLLEGE PLACE WATER DEPT · 8,147 people · 2019 | 2/2 | SYR4 |
| Barium | 7.28 µg/L 0.4% of the EPA limit 2000 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019
Highest in the ZIP: 98.911 µg/L — COLLEGE PLACE WATER DEPT · 8,147 people · 2019 | 2/2 | SYR4 |
| Copper | 51.48 µg/L 4% of the EPA limit 1300 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26.8 µg/L 45% of the EPA limit 60 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 1/2 | SYR4 |
| TTHM | 22.464 µg/L 28% of the EPA limit 80 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 2/2 | SYR4 |
| Chloroform | 21.62 µg/L No EPA limit set Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 17.24 µg/L No EPA limit set Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 1/2 | SYR4 |
| Lithium | 14.3 µg/L No EPA limit set Highest in the ZIP: COLLEGE PLACE WATER DEPT · 8,147 people · 2024 | 1/2 | UCMR-5 |
| Dichloroacetic Acid | 13.03 µg/L No EPA limit set Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 1/2 | SYR4 |
| Lead | 1.88 µg/L 13% of the EPA limit 15 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 1.87 µg/L No EPA limit set Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 1/2 | SYR4 |
| Bromoform | 1.33 µg/L No EPA limit set Highest in the ZIP: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 | 1/2 | SYR4 |
| Chromium | 1.06 µg/L 1.1% of the EPA limit 100 µg/L Highest in the ZIP: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 0.6900 µg/L No EPA limit set Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019
Highest in the ZIP: 1.004 µg/L — COLLEGE PLACE WATER DEPT · 8,147 people · 2019 | 2/2 | SYR4 |
| Thallium, Total | 0.3340 µg/L 17% of the EPA limit 2 µg/L Highest in the ZIP: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 | 1/2 | SYR4 |
| Arsenic | 0.3000 µg/L 3% of the EPA limit 10 µg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 0.1600 µg/L 2.7% of the EPA limit 6 µg/L Highest in the ZIP: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0044 mg/L 29% of the EPA limit 0.0150 mg/L Main supplier: WALLA WALLA WATER DIVISION · 42,959 people · 2025 | 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 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 99362
| Supplier | State | Population served |
|---|---|---|
| WALLA WALLA WATER DIVISION | WA | 42,959 |
| COLLEGE PLACE WATER DEPT | WA | 8,147 |
Frequently asked questions about ZIP 99362 tap water
Is the tap water in ZIP 99362 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 99362. 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 99362?
2 public water suppliers report EPA drinking-water monitoring for ZIP 99362. Each is listed above with its population served.
What contaminants are in ZIP 99362's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Barium, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.