What was found in ZIP 98642
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 | 2520 µg/L 25% of the EPA limit 10000 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 1934 µg/L 19% of the EPA limit 10000 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2017 | 1/2 | SYR4 |
| Fluoride | 240 µg/L 6% of the EPA limit 4000 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2017 | 2/2 | SYR4 |
| Barium | 67.935 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2017 | 2/2 | SYR4 |
| Copper | 35 µg/L 2.7% of the EPA limit 1300 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2017 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 21.14 µg/L 35% of the EPA limit 60 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 14.95 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 6.99 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| TTHM | 5.6225 µg/L 7% of the EPA limit 80 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| Arsenic | 5.35 µg/L 53% of the EPA limit 10 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2017 | 2/2 | SYR4 |
| Chromium | 3.65 µg/L 3.7% of the EPA limit 100 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2017 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 3.3 pCi/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2013 | 1/2 | SYR4 |
| Chloroform | 2.4 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 1.66 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 1.2 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 2/2 | SYR4 |
| 1,1,1-Trichloroethane | 1.1 µg/L 0.6% of the EPA limit 200 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 1.1 µg/L 16% of the EPA limit 7 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 1/2 | SYR4 |
| Bromoform | 0.5500 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 0.5100 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 1/2 | SYR4 |
| Trichloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2019 | 1/2 | SYR4 |
| PFOS | 0.0084 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2023 | 1/2 | UCMR-5 |
| PFOA | 0.0080 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2023 | 1/2 | UCMR-5 |
| PFHXS | 0.0053 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2023 | 1/2 | UCMR-5 |
| PFBS | 0.0041 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2023 | 1/2 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2023 | 1/2 | UCMR-5 |
| Lead | 0.0018 mg/L 12% of the EPA limit 0.0150 mg/L Main supplier: CLARK PUBLIC UTILITIES · 153,526 people · 2025
Highest in the ZIP: 0.0021 mg/L — RIDGEFIELD PUBLIC WORKS · 21,225 people · 2023 | 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 98642
| Supplier | State | Population served |
|---|---|---|
| CLARK PUBLIC UTILITIES | WA | 153,526 |
| RIDGEFIELD PUBLIC WORKS | WA | 21,225 |
Frequently asked questions about ZIP 98642 tap water
Is the tap water in ZIP 98642 safe to drink?
EPA testing detected 26 contaminants across the water suppliers serving ZIP 98642. 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 98642?
2 public water suppliers report EPA drinking-water monitoring for ZIP 98642. Each is listed above with its population served.
What contaminants are in ZIP 98642'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.