What was found in ZIP 98188
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 | 2200 µg/L 22% of the EPA limit 10000 µg/L Main supplier: RENTON CITY OF · 108,091 people · 2019 | 1/3 | SYR4 |
| Nitrate-Nitrite | 2090 µg/L 21% of the EPA limit 10000 µg/L Main supplier: RENTON CITY OF · 108,091 people · 2019 | 1/3 | SYR4 |
| Fluoride | 717 µg/L 18% of the EPA limit 4000 µg/L Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 890 µg/L — HIGHLINE WATER DISTRICT · 100,170 people · 2015 | 2/3 | SYR4 |
| TTHM | 18 µg/L 23% of the EPA limit 80 µg/L Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 43.834 µg/L — TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.2 µg/L 12% of the EPA limit 60 µg/L Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 42.865 µg/L — TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 3/3 | SYR4 |
| Chloroform | 9.66 µg/L No EPA limit set Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 41.285 µg/L — TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 4.3 µg/L No EPA limit set Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 25.5 µg/L — TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 3/3 | SYR4 |
| Copper | 20 µg/L 1.5% of the EPA limit 1300 µg/L Main supplier: RENTON CITY OF · 108,091 people · 2019 | 1/3 | SYR4 |
| Dichloroacetic Acid | 3.15 µg/L No EPA limit set Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 19.58 µg/L — TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 3/3 | SYR4 |
| Barium | 10 µg/L 0.5% of the EPA limit 2000 µg/L Highest in the ZIP: HIGHLINE WATER DISTRICT · 100,170 people · 2015 | 1/3 | SYR4 |
| Bromodichloromethane | 5.68 µg/L No EPA limit set Main supplier: RENTON CITY OF · 108,091 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 2.8 µg/L No EPA limit set Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 4.8 µg/L — TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 4.511 µg/L No EPA limit set Highest in the ZIP: TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 1.69 µg/L No EPA limit set Highest in the ZIP: TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 1/3 | SYR4 |
| Arsenic | 1.4 µg/L 14% of the EPA limit 10 µg/L Main supplier: RENTON CITY OF · 108,091 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 1.31 µg/L No EPA limit set Highest in the ZIP: TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 2/3 | SYR4 |
| Bromoform | 0.9000 µg/L No EPA limit set Main supplier: RENTON CITY OF · 108,091 people · 2019
Highest in the ZIP: 1.018 µg/L — TUKWILA WATER DEPARTMENT · 36,298 people · 2019 | 3/3 | SYR4 |
| PFBS | 0.0030 µg/L No EPA limit set Main supplier: RENTON CITY OF · 108,091 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0019 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: RENTON CITY OF · 108,091 people · 2025 | 2/3 | 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 98188
| Supplier | State | Population served |
|---|---|---|
| RENTON CITY OF | WA | 108,091 |
| HIGHLINE WATER DISTRICT | WA | 100,170 |
| TUKWILA WATER DEPARTMENT | WA | 36,298 |
Frequently asked questions about ZIP 98188 tap water
Is the tap water in ZIP 98188 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 98188. 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 98188?
3 public water suppliers report EPA drinking-water monitoring for ZIP 98188. Each is listed above with its population served.
What contaminants are in ZIP 98188's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.