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Kooskia, ID

EPA monitoring detected 8 contaminants across the 1 water supplier serving Kooskia. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
607
people served
8
contaminants found
Idaho rankings Lead in Idaho PFAS in Idaho

What was found in Kooskia'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.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
548.65 µg/L 14%
of the EPA limit 4000 µg/L
Main supplier: KOOSKIA WATER DEPT · 607 people · 2013
1/1 SYR4
Lithium
11 µg/L
No EPA limit set
Main supplier: KOOSKIA WATER DEPT · 607 people · 2023
1/1 UCMR-5
Barium
9.688 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: KOOSKIA WATER DEPT · 607 people · 2013
1/1 SYR4
Chromium
2.587 µg/L 2.6%
of the EPA limit 100 µg/L
Main supplier: KOOSKIA WATER DEPT · 607 people · 2013
1/1 SYR4
Selenium
2.07 µg/L 4.1%
of the EPA limit 50 µg/L
Main supplier: KOOSKIA WATER DEPT · 607 people · 2013
1/1 SYR4
Arsenic
1.67 µg/L 17%
of the EPA limit 10 µg/L
Main supplier: KOOSKIA WATER DEPT · 607 people · 2013
1/1 SYR4
Combined Radium (-226 And -228)
0.5032 pCi/L 10%
of the EPA limit 5 pCi/L
Main supplier: KOOSKIA WATER DEPT · 607 people · 2019
1/1 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: KOOSKIA WATER DEPT · 607 people · 2025
1/1 LCR
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 95th percentile of the system's samples — 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 Kooskia

SupplierPopulation served
KOOSKIA WATER DEPT 607

Frequently asked questions about Kooskia tap water

Is Kooskia tap water safe to drink?

EPA testing detected 8 contaminants in the water serving Kooskia. 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 Kooskia?

1 public water supplier report drinking-water monitoring for Kooskia, Idaho to the EPA. Each is listed above with its population served.

What contaminants are in Kooskia's water?

The contaminants EPA monitoring detected in Kooskia include Fluoride, Lithium, Barium, Chromium, Selenium. 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.