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Tap water quality report

Moscow, ID

EPA monitoring detected 15 contaminants across the 4 water suppliers serving Moscow. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

4
water suppliers
34,998
people served
15
contaminants found
Idaho rankings Lead in Idaho PFAS in Idaho

What was found in Moscow's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
6320 µg/L 63%
of the EPA limit 10000 µg/L
 1/4 SYR4
Fluoride
1370 µg/L 34%
of the EPA limit 4000 µg/L
 4/4 SYR4
Nitrate-Nitrite
465 µg/L 4.7%
of the EPA limit 10000 µg/L
 1/4 SYR4
Barium
181 µg/L 9%
of the EPA limit 2000 µg/L
 4/4 SYR4
Arsenic
38.6 µg/L 386%
of the EPA limit, in the worst sample — 10 µg/L
 1/4 SYR4
TTHM
5.42 µg/L 6.8%
of the EPA limit 80 µg/L
 2/4 SYR4
Gross Beta Particle Activity
4.18 pCi/L
No EPA limit set
 1/4 SYR4
Selenium
3.12 µg/L 6.2%
of the EPA limit 50 µg/L
 1/4 SYR4
Gross Alpha, Excl. Radon And U
2.1 pCi/L 14%
of the EPA limit 15 pCi/L
 3/4 SYR4
Chromium
1.98 µg/L 2%
of the EPA limit 100 µg/L
 4/4 SYR4
Combined Uranium
1.35 µg/L 4.5%
of the EPA limit 30 µg/L
 1/4 SYR4
Total Haloacetic Acids (HAA5)
1.23 µg/L 2.1%
of the EPA limit 60 µg/L
 1/4 SYR4
Combined Radium (-226 And -228)
1.11 pCi/L 22%
of the EPA limit 5 pCi/L
 4/4 SYR4
Lead
0.0050 mg/L 33%
of the EPA limit 0.0150 mg/L
 4/4 LCR
Asbestos
-0.20 MFL -2.9%
of the EPA limit 7 MFL
 1/4 SYR4
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Moscow

SupplierPopulation 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 highest level found 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.