What was found in ZIP 98903
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 | 590 µg/L 5.9% of the EPA limit 10000 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 1740 µg/L — UNION GAP WATER · 6,433 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 590 µg/L 5.9% of the EPA limit 10000 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 1740 µg/L — UNION GAP WATER · 6,433 people · 2019 | 3/3 | SYR4 |
| Fluoride | 804 µg/L 20% of the EPA limit 4000 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 937.5 µg/L — NOB HILL WATER ASSOCIATION · 38,050 people · 2019 | 3/3 | SYR4 |
| TTHM | 64.8 µg/L 81% of the EPA limit 80 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 2/3 | SYR4 |
| Chloroform | 61.76 µg/L No EPA limit set Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 2/3 | SYR4 |
| Nitrite | 50 µg/L 5% of the EPA limit 1000 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.25 µg/L 74% of the EPA limit 60 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 2/3 | SYR4 |
| Barium | 19.155 µg/L 1% of the EPA limit 2000 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 37.496 µg/L — UNION GAP WATER · 6,433 people · 2019 | 3/3 | SYR4 |
| Lithium | 33 µg/L No EPA limit set Highest in the ZIP: NOB HILL WATER ASSOCIATION · 38,050 people · 2024 | 2/3 | UCMR-5 |
| Trichloroacetic Acid | 27.36 µg/L No EPA limit set Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 19.11 µg/L No EPA limit set Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 2/3 | SYR4 |
| Copper | 14.518 µg/L 1.1% of the EPA limit 1300 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 19.068 µg/L — UNION GAP WATER · 6,433 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 3.995 µg/L No EPA limit set Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 6.101 µg/L — NOB HILL WATER ASSOCIATION · 38,050 people · 2019 | 2/3 | SYR4 |
| Arsenic | 3.4875 µg/L 35% of the EPA limit 10 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 5.84 µg/L — UNION GAP WATER · 6,433 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 1.605 µg/L No EPA limit set Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 4.262 µg/L — NOB HILL WATER ASSOCIATION · 38,050 people · 2019 | 2/3 | SYR4 |
| Lead | 0.8380 µg/L 5.6% of the EPA limit 15 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 4.255 µg/L — UNION GAP WATER · 6,433 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 3.3 µg/L No EPA limit set Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 1/3 | SYR4 |
| Chromium | 3.235 µg/L 3.2% of the EPA limit 100 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 3/3 | SYR4 |
| Selenium | 1.581 µg/L 3.2% of the EPA limit 50 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 2/3 | SYR4 |
| Bromoform | 1.07 µg/L No EPA limit set Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019
Highest in the ZIP: 1.225 µg/L — NOB HILL WATER ASSOCIATION · 38,050 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 1.1945 µg/L No EPA limit set Highest in the ZIP: NOB HILL WATER ASSOCIATION · 38,050 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.9015 µg/L 45% of the EPA limit 2 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 3/3 | SYR4 |
| Antimony, Total | 0.2740 µg/L 4.6% of the EPA limit 6 µg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 people · 2019 | 2/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: YAKIMA WATER DIVISION CITY OF · 112,858 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 98903
| Supplier | State | Population served |
|---|---|---|
| YAKIMA WATER DIVISION CITY OF | WA | 112,858 |
| NOB HILL WATER ASSOCIATION | WA | 38,050 |
| UNION GAP WATER | WA | 6,433 |
Frequently asked questions about ZIP 98903 tap water
Is the tap water in ZIP 98903 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 98903. 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 98903?
3 public water suppliers report EPA drinking-water monitoring for ZIP 98903. Each is listed above with its population served.
What contaminants are in ZIP 98903's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.