What was found in Ellensburg'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 | 660 µg/L 6.6% of the EPA limit 10000 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2019
Highest in the city: 1420 µg/L — GRASSLANDS WATER SYSTEM · 264 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 583.5 µg/L 5.8% of the EPA limit 10000 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2018
Highest in the city: 1143 µg/L — GRASSLANDS WATER SYSTEM · 264 people · 2019 | 3/3 | SYR4 |
| Fluoride | 812.5 µg/L 20% of the EPA limit 4000 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2018 | 3/3 | SYR4 |
| Barium | 20.7 µg/L 1% of the EPA limit 2000 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2018
Highest in the city: 65.85 µg/L — CENTRAL MOBILE HOME PARK · 110 people · 2016 | 3/3 | SYR4 |
| Chromium | 9.5 µg/L 9.5% of the EPA limit 100 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2018 | 3/3 | SYR4 |
| Copper | 6 µg/L 0.5% of the EPA limit 1300 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2018 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 2.757 pCi/L No EPA limit set Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2018 | 3/3 | SYR4 |
| TTHM | 1.5 µg/L 1.9% of the EPA limit 80 µg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2013 | 1/3 | SYR4 |
| Bromodichloromethane | 0.5000 µg/L No EPA limit set Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2019 | 1/3 | SYR4 |
| Chloroform | 0.5000 µg/L No EPA limit set Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 0.5000 µg/L No EPA limit set Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.4400 µg/L 22% of the EPA limit 2 µg/L Highest in the city: GRASSLANDS WATER SYSTEM · 264 people · 2016 | 2/3 | SYR4 |
| Lead | 0.3300 µg/L 2.2% of the EPA limit 15 µg/L Highest in the city: GRASSLANDS WATER SYSTEM · 264 people · 2016 | 2/3 | SYR4 |
| Lead | 0.0015 mg/L 10% of the EPA limit 0.0150 mg/L Main supplier: ELLENSBURG WATER DEPT · 20,900 people · 2023 | 3/3 | LCR |
Water suppliers serving Ellensburg
| Supplier | Population served |
|---|---|
| ELLENSBURG WATER DEPT | 20,900 |
| GRASSLANDS WATER SYSTEM | 264 |
| CENTRAL MOBILE HOME PARK | 110 |
Frequently asked questions about Ellensburg tap water
Is Ellensburg tap water safe to drink?
EPA testing detected 15 contaminants in the water serving Ellensburg. 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 Ellensburg?
3 public water suppliers report drinking-water monitoring for Ellensburg, Washington to the EPA. Each is listed above with its population served.
What contaminants are in Ellensburg's water?
The contaminants EPA monitoring detected in Ellensburg include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Chromium. 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.