What was found in Wasilla's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 1250 µg/L 13% of the EPA limit 10000 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 15600 µg/L — WESTWOOD WATER COMPANY INC · 180 people · 2019 | 32/46 | SYR4 |
| Nitrate | 8350 µg/L 84% of the EPA limit 10000 µg/L Highest in the city: WESTWOOD WATER COMPANY INC · 180 people · 2016 | 7/46 | SYR4 |
| Copper | 662.25 µg/L 51% of the EPA limit 1300 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 1999.5 µg/L — WESTWOOD WATER COMPANY INC · 180 people · 2019 | 40/46 | SYR4 |
| Fluoride | 113 µg/L 2.8% of the EPA limit 4000 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 200 µg/L — CAMERON ACRES · 80 people · 2019 | 7/46 | SYR4 |
| Nitrite | 200 µg/L 20% of the EPA limit 1000 µg/L Highest in the city: SNOWSHOE ACRES LLC · 32 people · 2015 | 1/46 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11 µg/L 18% of the EPA limit 60 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 118.35 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 7/46 | SYR4 |
| TTHM | 19.26 µg/L 24% of the EPA limit 80 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 87.55 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 7/46 | SYR4 |
| Trichloroacetic Acid | 5.7 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 77.15 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 5/46 | SYR4 |
| Chloroform | 15.915 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 73.45 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 7/46 | SYR4 |
| Barium | 33.4 µg/L 1.7% of the EPA limit 2000 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 66 µg/L — WELLINGFIELD WEST DIV I II · 168 people · 2019 | 37/46 | SYR4 |
| Dichloroacetic Acid | 5.1475 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 39.065 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 7/46 | SYR4 |
| Arsenic | 12.98 µg/L 130% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 37.225 µg/L — CAMERON ACRES · 80 people · 2019 | 20/46 | SYR4 |
| Bromodichloromethane | 4.535 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 13 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 7/46 | SYR4 |
| Cyanide | 4.6 µg/L 2.3% of the EPA limit 200 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 13 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 2/46 | SYR4 |
| Lead | 9.16 µg/L 61% of the EPA limit 15 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 10.94 µg/L — WILDERNESS ESTATES · 110 people · 2019 | 38/46 | SYR4 |
| Gross Beta Particle Activity | 6.6 pCi/L No EPA limit set Highest in the city: CREEKWOOD PARK WATER SYSTEM · 192 people · 2016 | 1/46 | SYR4 |
| Xylenes, Total | 6.4315 µg/L 0.1% of the EPA limit 10000 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019 | 2/46 | SYR4 |
| Monochloroacetic Acid | 5.8 µg/L No EPA limit set Highest in the city: CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 3/46 | SYR4 |
| Dibromochloromethane | 2.355 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 5.467 µg/L — WELLINGFIELD WEST DIV I II · 168 people · 2017 | 6/46 | SYR4 |
| Bromoform | 0.6960 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 3.44 µg/L — WELLINGFIELD WEST DIV I II · 168 people · 2017 | 3/46 | SYR4 |
| Chromium | 0.6630 µg/L 0.7% of the EPA limit 100 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 2.075 µg/L — CREEKWOOD PARK WATER SYSTEM · 192 people · 2019 | 4/46 | SYR4 |
| Antimony, Total | 1.91 µg/L 32% of the EPA limit 6 µg/L Highest in the city: NORTHWOOD APARTMENTS · 72 people · 2013 | 2/46 | SYR4 |
| Dibromoacetic Acid | 1.095 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 1.75 µg/L — WELLINGFIELD WEST DIV I II · 168 people · 2017 | 4/46 | SYR4 |
| Dichloromethane | 1.3 µg/L 26% of the EPA limit 5 µg/L Highest in the city: SHORES OF ANCIENT TREE · 170 people · 2019 | 3/46 | SYR4 |
| Combined Radium (-226 And -228) | 1.1 pCi/L 22% of the EPA limit 5 pCi/L Highest in the city: UNIFIED ALASKAN UTILITIES SETTLERS BAY · 2,733 people · 2016 | 5/46 | SYR4 |
| Ethylbenzene | 0.8800 µg/L 0.1% of the EPA limit 700 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019 | 1/46 | SYR4 |
| Toluene | 0.7940 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019
Highest in the city: 0.8600 µg/L — UNIFIED ALASKAN UTILITIES SETTLERS BAY · 2,733 people · 2018 | 2/46 | SYR4 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L Highest in the city: UTOPIA MEADOWS SD · 232 people · 2012 | 1/46 | SYR4 |
| Combined Uranium | 0.1600 µg/L 0.5% of the EPA limit 30 µg/L Highest in the city: UNIFIED ALASKAN UTILITIES SETTLERS BAY · 2,733 people · 2016 | 3/46 | SYR4 |
| Cadmium | 0.1510 µg/L 3% of the EPA limit 5 µg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2019 | 1/46 | SYR4 |
| Lead | 0.0031 mg/L 21% of the EPA limit 0.0150 mg/L Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2024
Highest in the city: 0.0095 mg/L — BLUFF VIEW ACRES WATER SYSTEM · 100 people · 2022 | 46/46 | LCR |
| PFHXS | 0.0042 µg/L No EPA limit set Main supplier: WASILLA WATER SYSTEM · 18,492 people · 2024 | 1/46 | UCMR-5 |
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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Wasilla
Frequently asked questions about Wasilla tap water
Is Wasilla tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Wasilla. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Wasilla?
46 public water suppliers report drinking-water monitoring for Wasilla, Alaska to the EPA. Each is listed above with its population served.
What contaminants are in Wasilla's water?
The contaminants EPA monitoring detected in Wasilla include Nitrate-Nitrite, Nitrate, Copper, Fluoride, Nitrite. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.