What was found in ZIP 98148
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 |
|---|---|---|---|
| Fluoride | 890 µg/L 22% of the EPA limit 4000 µg/L Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2015 | 1/2 | SYR4 |
| TTHM | 43.495 µg/L 54% of the EPA limit 80 µg/L Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019
Highest in the ZIP: 48.15 µg/L — KING COUNTY WATER DISTRICT #20 · 48,469 people · 2019 | 2/2 | SYR4 |
| Chloroform | 39.46 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019
Highest in the ZIP: 46.26 µg/L — KING COUNTY WATER DISTRICT #20 · 48,469 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 39.235 µg/L 65% of the EPA limit 60 µg/L Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 23.43 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019
Highest in the ZIP: 26.38 µg/L — KING COUNTY WATER DISTRICT #20 · 48,469 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 17.93 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019 | 2/2 | SYR4 |
| Barium | 10 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2015 | 1/2 | SYR4 |
| Bromodichloromethane | 5.558 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 3.1485 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019
Highest in the ZIP: 3.8715 µg/L — KING COUNTY WATER DISTRICT #20 · 48,469 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 2.45 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019
Highest in the ZIP: 2.718 µg/L — KING COUNTY WATER DISTRICT #20 · 48,469 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.0585 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019 | 2/2 | SYR4 |
| Arsenic | 1 µg/L 10% of the EPA limit 10 µg/L Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2015 | 1/2 | SYR4 |
| Bromoform | 0.6936 µg/L No EPA limit set Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2019 | 2/2 | SYR4 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: HIGHLINE WATER DISTRICT · 100,170 people · 2025 | 1/2 | 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 98148
| Supplier | State | Population served |
|---|---|---|
| HIGHLINE WATER DISTRICT | WA | 100,170 |
| KING COUNTY WATER DISTRICT #20 | WA | 48,469 |
Frequently asked questions about ZIP 98148 tap water
Is the tap water in ZIP 98148 safe to drink?
EPA testing detected 14 contaminants across the water suppliers serving ZIP 98148. 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 98148?
2 public water suppliers report EPA drinking-water monitoring for ZIP 98148. Each is listed above with its population served.
What contaminants are in ZIP 98148's water?
EPA monitoring detected Fluoride, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others across this ZIP's suppliers. The full list with levels and sources is above.