What was found in La Grande'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 | 1348 µg/L 13% of the EPA limit 10000 µg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2019
Highest in the city: 4831 µg/L — FLYING K TRAILER RANCH · 96 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 3616 µg/L 36% of the EPA limit 10000 µg/L Highest in the city: FLYING K TRAILER RANCH · 96 people · 2015 | 2/3 | SYR4 |
| Copper | 30.3 µg/L 2.3% of the EPA limit 1300 µg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2017
Highest in the city: 277 µg/L — FLYING K TRAILER RANCH · 96 people · 2019 | 3/3 | SYR4 |
| Barium | 56.63 µg/L 2.8% of the EPA limit 2000 µg/L Highest in the city: FLYING K TRAILER RANCH · 96 people · 2015 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 34.54 µg/L 58% of the EPA limit 60 µg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2019 | 2/3 | SYR4 |
| TTHM | 5.341 µg/L 6.7% of the EPA limit 80 µg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2019
Highest in the city: 7.57 µg/L — FLYING K TRAILER RANCH · 96 people · 2018 | 2/3 | SYR4 |
| Lead | 1.36 µg/L 9.1% of the EPA limit 15 µg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2017
Highest in the city: 7.291 µg/L — SUNDOWNER MOBILE HOME PARK · 160 people · 2018 | 3/3 | SYR4 |
| Arsenic | 6.526 µg/L 65% of the EPA limit 10 µg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2017 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.2 pCi/L 28% of the EPA limit 15 pCi/L Highest in the city: FLYING K TRAILER RANCH · 96 people · 2013 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.3 pCi/L 46% of the EPA limit 5 pCi/L Highest in the city: SUNDOWNER MOBILE HOME PARK · 160 people · 2019 | 1/3 | SYR4 |
| Selenium | 0.7130 µg/L 1.4% of the EPA limit 50 µg/L Highest in the city: FLYING K TRAILER RANCH · 96 people · 2015 | 1/3 | SYR4 |
| Tetrachloroethylene | 0.6900 µg/L 14% of the EPA limit 5 µg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.1250 µg/L 2.5% of the EPA limit 5 µg/L Highest in the city: FLYING K TRAILER RANCH · 96 people · 2015 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: LA GRANDE, CITY OF · 13,460 people · 2023
Highest in the city: 0.0019 mg/L — FLYING K TRAILER RANCH · 96 people · 2023 | 3/3 | LCR |
Water suppliers serving La Grande
| Supplier | Population served |
|---|---|
| LA GRANDE, CITY OF | 13,460 |
| SUNDOWNER MOBILE HOME PARK | 160 |
| FLYING K TRAILER RANCH | 96 |
Frequently asked questions about La Grande tap water
Is La Grande tap water safe to drink?
EPA testing detected 14 contaminants in the water serving La Grande. 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 La Grande?
3 public water suppliers report drinking-water monitoring for La Grande, Oregon to the EPA. Each is listed above with its population served.
What contaminants are in La Grande's water?
The contaminants EPA monitoring detected in La Grande include Nitrate, Nitrate-Nitrite, Copper, Barium, Total Haloacetic Acids (HAA5). 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.