What was found in Hayden'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 | 2417.5 µg/L 24% of the EPA limit 10000 µg/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2019
Highest in the city: 3020 µg/L — CHATEAUX WATER ASSN INC · 275 people · 2019 | 11/12 | SYR4 |
| Nitrate-Nitrite | 1600 µg/L 16% of the EPA limit 10000 µg/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2019
Highest in the city: 2230 µg/L — CHATEAUX WATER ASSN INC · 275 people · 2019 | 10/12 | SYR4 |
| Fluoride | 300 µg/L 7.5% of the EPA limit 4000 µg/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2017
Highest in the city: 482.5 µg/L — BLACK ROCK UTILITIES INC · 1,014 people · 2017 | 2/12 | SYR4 |
| Barium | 34 µg/L 1.7% of the EPA limit 2000 µg/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2017
Highest in the city: 78.15 µg/L — BLACK ROCK UTILITIES INC · 1,014 people · 2017 | 10/12 | SYR4 |
| Arsenic | 4.07 µg/L 41% of the EPA limit 10 µg/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2017
Highest in the city: 16.2 µg/L — AVONDALE IRRIGATION DIST · 8,785 people · 2019 | 7/12 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.259 pCi/L 8.4% of the EPA limit 15 pCi/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2019
Highest in the city: 6.04 pCi/L — BLACK ROCK UTILITIES INC · 1,014 people · 2016 | 9/12 | SYR4 |
| Total Haloacetic Acids (HAA5) | 5.464 µg/L 9.1% of the EPA limit 60 µg/L Highest in the city: GREENFERRY WATER & SEWER DISTRICT · 978 people · 2019 | 1/12 | SYR4 |
| Combined Uranium | 5.071 µg/L 17% of the EPA limit 30 µg/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2019 | 5/12 | SYR4 |
| TTHM | 3.42 µg/L 4.3% of the EPA limit 80 µg/L Highest in the city: GREENFERRY WATER & SEWER DISTRICT · 978 people · 2019 | 3/12 | SYR4 |
| Combined Radium (-226 And -228) | 0.7752 pCi/L 16% of the EPA limit 5 pCi/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2019
Highest in the city: 2 pCi/L — PARKVIEW WATER ASSN · 90 people · 2019 | 10/12 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.3590 µg/L 0.1% of the EPA limit 400 µg/L Highest in the city: LONE MOUNTAIN ESTATES · 448 people · 2019 | 1/12 | SYR4 |
| Asbestos | 0.2000 MFL 2.9% of the EPA limit 7 MFL Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2012 | 1/12 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: HAYDEN LAKE IRRIGATION DIST · 9,375 people · 2025
Highest in the city: 0.0090 mg/L — PARKVIEW WATER ASSN · 90 people · 2023 | 12/12 | LCR |
Water suppliers serving Hayden
| Supplier | Population served |
|---|---|
| HAYDEN LAKE IRRIGATION DIST | 9,375 |
| AVONDALE IRRIGATION DIST | 8,785 |
| BLACK ROCK UTILITIES INC | 1,014 |
| GREENFERRY WATER & SEWER DISTRICT | 978 |
| LONE MOUNTAIN ESTATES | 448 |
| GARWOOD WATER COOP | 398 |
| CHATEAUX WATER ASSN INC | 275 |
| OHIO MATCH ROAD WATER DIST | 245 |
| HIDDEN VALLEY WATER ASSN | 125 |
| PARKVIEW WATER ASSN | 90 |
| HARDING ACRES TRACTS WATER ASSN INC | 64 |
| PRAIRIE WATER ASSN | 30 |
Frequently asked questions about Hayden tap water
Is Hayden tap water safe to drink?
EPA testing detected 13 contaminants in the water serving Hayden. 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 Hayden?
12 public water suppliers report drinking-water monitoring for Hayden, Idaho to the EPA. Each is listed above with its population served.
What contaminants are in Hayden's water?
The contaminants EPA monitoring detected in Hayden include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Arsenic. 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.