What was found in Chelan'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 | 740 µg/L 7.4% of the EPA limit 10000 µg/L Highest in the city: HAWKS MEADOW WATER SYSTEM · 43 people · 2019 | 3/6 | SYR4 |
| Nitrate-Nitrite | 736 µg/L 7.4% of the EPA limit 10000 µg/L Highest in the city: HAWKS MEADOW WATER SYSTEM · 43 people · 2019 | 3/6 | SYR4 |
| Fluoride | 78 µg/L 2% of the EPA limit 4000 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 259.5 µg/L — HAWKS MEADOW WATER SYSTEM · 43 people · 2016 | 3/6 | SYR4 |
| Barium | 9.164 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 53.8365 µg/L — HAWKS MEADOW WATER SYSTEM · 43 people · 2016 | 3/6 | SYR4 |
| TTHM | 22.505 µg/L 28% of the EPA limit 80 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 40.045 µg/L — Little Butte Water System · 101 people · 2019 | 5/6 | SYR4 |
| Chloroform | 21.7105 µg/L No EPA limit set Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 39.165 µg/L — Little Butte Water System · 101 people · 2019 | 5/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 18.3 µg/L 31% of the EPA limit 60 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 25.02 µg/L — Bear Mountain Water District · 177 people · 2018 | 5/6 | SYR4 |
| Dichloroacetic Acid | 9.05 µg/L No EPA limit set Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 14.98 µg/L — Bear Mountain Water District · 177 people · 2019 | 5/6 | SYR4 |
| Trichloroacetic Acid | 10.21 µg/L No EPA limit set Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 13.685 µg/L — Little Butte Water System · 101 people · 2019 | 4/6 | SYR4 |
| Dalapon | 8.27 µg/L 4.1% of the EPA limit 200 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019 | 1/6 | SYR4 |
| Copper | 8.258 µg/L 0.6% of the EPA limit 1300 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019 | 2/6 | SYR4 |
| Monochloroacetic Acid | 2.5 µg/L No EPA limit set Highest in the city: Little Butte Water System · 101 people · 2019 | 3/6 | SYR4 |
| Chromium | 0.4700 µg/L 0.5% of the EPA limit 100 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 2.448 µg/L — HAWKS MEADOW WATER SYSTEM · 43 people · 2016 | 2/6 | SYR4 |
| Arsenic | 0.3100 µg/L 3.1% of the EPA limit 10 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 1.364 µg/L — HAWKS MEADOW WATER SYSTEM · 43 people · 2016 | 2/6 | SYR4 |
| Bromodichloromethane | 1.015 µg/L No EPA limit set Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 1.22 µg/L — Little Butte Water System · 101 people · 2019 | 5/6 | SYR4 |
| Selenium | 1.0825 µg/L 2.2% of the EPA limit 50 µg/L Highest in the city: HAWKS MEADOW WATER SYSTEM · 43 people · 2016 | 1/6 | SYR4 |
| Thallium, Total | 0.2670 µg/L 13% of the EPA limit 2 µg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2019
Highest in the city: 0.9200 µg/L — HAWKS MEADOW WATER SYSTEM · 43 people · 2016 | 2/6 | SYR4 |
| Lead | 0.4100 µg/L 2.7% of the EPA limit 15 µg/L Highest in the city: HAWKS MEADOW WATER SYSTEM · 43 people · 2016 | 1/6 | SYR4 |
| Lead | 0.0032 mg/L 21% of the EPA limit 0.0150 mg/L Main supplier: CHELAN WATER DEPT CITY OF · 9,425 people · 2025
Highest in the city: 0.0086 mg/L — SNOW CREEK WATER SYSTEM · 41 people · 1998 | 6/6 | 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.
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 Chelan
| Supplier | Population served |
|---|---|
| CHELAN WATER DEPT CITY OF | 9,425 |
| HOLDEN VILLAGE | 228 |
| Bear Mountain Water District | 177 |
| Little Butte Water System | 101 |
| HAWKS MEADOW WATER SYSTEM | 43 |
| SNOW CREEK WATER SYSTEM | 41 |
Frequently asked questions about Chelan tap water
Is Chelan tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Chelan. 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 Chelan?
6 public water suppliers report drinking-water monitoring for Chelan, Washington to the EPA. Each is listed above with its population served.
What contaminants are in Chelan's water?
The contaminants EPA monitoring detected in Chelan include Nitrate, Nitrate-Nitrite, Fluoride, Barium, TTHM. 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.