What was found in Moscow'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 | 5910 µg/L 59% of the EPA limit 10000 µg/L Highest in the city: NORTH TOMER BUTTE W&S DISTRICT · 259 people · 2019 | 1/4 | SYR4 |
| Fluoride | 1356 µg/L 34% of the EPA limit 4000 µg/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2018 | 4/4 | SYR4 |
| Nitrate-Nitrite | 465 µg/L 4.7% of the EPA limit 10000 µg/L Highest in the city: NORTH TOMER BUTTE W&S DISTRICT · 259 people · 2019 | 1/4 | SYR4 |
| Barium | 175.6 µg/L 8.8% of the EPA limit 2000 µg/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2018
Highest in the city: 180.95 µg/L — UNIVERSITY OF IDAHO · 8,589 people · 2019 | 4/4 | SYR4 |
| Arsenic | 11.7854 µg/L 118% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: NORTH TOMER BUTTE W&S DISTRICT · 259 people · 2019 | 1/4 | SYR4 |
| TTHM | 4.8465 µg/L 6.1% of the EPA limit 80 µg/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2019 | 2/4 | SYR4 |
| Gross Beta Particle Activity | 4.18 pCi/L No EPA limit set Highest in the city: APEX LIVING COMMUNITY · 150 people · 2018 | 1/4 | SYR4 |
| Selenium | 2.934 µg/L 5.9% of the EPA limit 50 µg/L Highest in the city: NORTH TOMER BUTTE W&S DISTRICT · 259 people · 2019 | 1/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.1 pCi/L 14% of the EPA limit 15 pCi/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2019 | 3/4 | SYR4 |
| Chromium | 1.12 µg/L 1.1% of the EPA limit 100 µg/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2018
Highest in the city: 1.905 µg/L — NORTH TOMER BUTTE W&S DISTRICT · 259 people · 2019 | 4/4 | SYR4 |
| Combined Uranium | 1.28256 µg/L 4.3% of the EPA limit 30 µg/L Highest in the city: NORTH TOMER BUTTE W&S DISTRICT · 259 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.222 µg/L 2% of the EPA limit 60 µg/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.0545 pCi/L 21% of the EPA limit 5 pCi/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2018 | 4/4 | SYR4 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L Main supplier: MOSCOW WATER DEPT · 26,000 people · 2024
Highest in the city: 0.0050 mg/L — UNIVERSITY OF IDAHO · 8,589 people · 2024 | 4/4 | LCR |
| Asbestos | -0.20 MFL -2.9% of the EPA limit 7 MFL Highest in the city: UNIVERSITY OF IDAHO · 8,589 people · 2013 | 1/4 | SYR4 |
Water suppliers serving Moscow
| Supplier | Population served |
|---|---|
| MOSCOW WATER DEPT | 26,000 |
| UNIVERSITY OF IDAHO | 8,589 |
| NORTH TOMER BUTTE W&S DISTRICT | 259 |
| APEX LIVING COMMUNITY | 150 |
Frequently asked questions about Moscow tap water
Is Moscow tap water safe to drink?
EPA testing detected 15 contaminants in the water serving Moscow. 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 Moscow?
4 public water suppliers report drinking-water monitoring for Moscow, Idaho to the EPA. Each is listed above with its population served.
What contaminants are in Moscow's water?
The contaminants EPA monitoring detected in Moscow include Nitrate, Fluoride, Nitrate-Nitrite, 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.