What was found in Coeur D Alene'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 | 1930 µg/L 19% of the EPA limit 10000 µg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019
Highest in the city: 3851.5 µg/L — GEM STATE - DIAMOND BAR ESTATES · 143 people · 2019 | 23/30 | SYR4 |
| Nitrate-Nitrite | 1971 µg/L 20% of the EPA limit 10000 µg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019
Highest in the city: 3020 µg/L — MORRISON ESTATES HOMEOWNER WATER ASSN · 80 people · 2019 | 20/30 | SYR4 |
| Fluoride | 320 µg/L 8% of the EPA limit 4000 µg/L Highest in the city: RAMSEY ESTATES · 88 people · 2016 | 3/30 | SYR4 |
| Barium | 61.4 µg/L 3.1% of the EPA limit 2000 µg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019
Highest in the city: 120 µg/L — FERNAN ESTATES CORPORATION · 37 people · 2019 | 20/30 | SYR4 |
| TTHM | 0.8575 µg/L 1.1% of the EPA limit 80 µg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019
Highest in the city: 58.255 µg/L — CARLIN BAY PROPERTY OWNERS ASSOCIATION · 220 people · 2019 | 8/30 | SYR4 |
| Total Haloacetic Acids (HAA5) | 37.48 µg/L 62% of the EPA limit 60 µg/L Highest in the city: CARLIN BAY PROPERTY OWNERS ASSOCIATION · 220 people · 2019 | 5/30 | SYR4 |
| Arsenic | 22.98 µg/L 230% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019 | 14/30 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.73 pCi/L 25% of the EPA limit 15 pCi/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019
Highest in the city: 7.603 pCi/L — FERNAN ESTATES CORPORATION · 37 people · 2017 | 15/30 | SYR4 |
| Combined Uranium | 4.903 µg/L 16% of the EPA limit 30 µg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019
Highest in the city: 5.79 µg/L — GEM STATE - LYNNWOOD ESTATES · 60 people · 2016 | 14/30 | SYR4 |
| Combined Radium (-226 And -228) | 3.86 pCi/L 77% of the EPA limit 5 pCi/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019 | 17/30 | SYR4 |
| Gross Beta Particle Activity | 2 pCi/L No EPA limit set Highest in the city: HUETTER CITY OF · 70 people · 2016 | 1/30 | SYR4 |
| Trichloroethylene | 1.088 µg/L 22% of the EPA limit 5 µg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2019 | 1/30 | SYR4 |
| 2,4-D | 0.2770 µg/L 0.4% of the EPA limit 70 µg/L Highest in the city: CARLIN BAY PROPERTY OWNERS ASSOCIATION · 220 people · 2019 | 1/30 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: COEUR D ALENE CITY OF · 54,115 people · 2025
Highest in the city: 0.0090 mg/L — HUETTER CITY OF · 70 people · 2025 | 30/30 | LCR |
Water suppliers serving Coeur D Alene
Frequently asked questions about Coeur D Alene tap water
Is Coeur D Alene tap water safe to drink?
EPA testing detected 14 contaminants in the water serving Coeur D Alene. 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 Coeur D Alene?
30 public water suppliers report drinking-water monitoring for Coeur D Alene, Idaho to the EPA. Each is listed above with its population served.
What contaminants are in Coeur D Alene's water?
The contaminants EPA monitoring detected in Coeur D Alene 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.