What was found in ZIP 99320
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 | 5406 µg/L 54% of the EPA limit 10000 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 4952 µg/L 50% of the EPA limit 10000 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Fluoride | 576.75 µg/L 14% of the EPA limit 4000 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Barium | 104.1 µg/L 5.2% of the EPA limit 2000 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| TTHM | 26.72 µg/L 33% of the EPA limit 80 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 18.8 µg/L 63% of the EPA limit 30 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2012 | 1/1 | SYR4 |
| Bromoform | 18.43 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Lithium | 15.4 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | UCMR-5 |
| Copper | 9.65 µg/L 0.7% of the EPA limit 1300 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 8.375 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 6.64 µg/L 11% of the EPA limit 60 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Arsenic | 5.55 µg/L 55% of the EPA limit 10 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 5.12 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Selenium | 3.615 µg/L 7.2% of the EPA limit 50 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 2.555 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.98 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 1.2 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Chromium | 1 µg/L 1% of the EPA limit 100 µg/L Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| Asbestos | 0.9850 MFL 14% of the EPA limit 7 MFL Main supplier: BENTON CITY WATER · 5,626 people · 2013 | 1/1 | SYR4 |
| Chloroform | 0.5000 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2019 | 1/1 | SYR4 |
| PFHXS | 0.0143 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | UCMR-5 |
| PFOS | 0.0087 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | UCMR-5 |
| Pfhxa | 0.0055 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | UCMR-5 |
| Pfpea | 0.0053 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | UCMR-5 |
| Pfpes | 0.0049 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | UCMR-5 |
| PFBS | 0.0045 µg/L No EPA limit set Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: BENTON CITY WATER · 5,626 people · 2023 | 1/1 | 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 99320
| Supplier | State | Population served |
|---|---|---|
| BENTON CITY WATER | WA | 5,626 |
Frequently asked questions about ZIP 99320 tap water
Is the tap water in ZIP 99320 safe to drink?
EPA testing detected 28 contaminants across the water suppliers serving ZIP 99320. 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 99320?
1 public water supplier report EPA drinking-water monitoring for ZIP 99320. Each is listed above with its population served.
What contaminants are in ZIP 99320'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.