Is Spirit Lake, ID Tap Water Safe? Quality & Contaminants

What was found in Spirit Lake'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	346.8 µg/L 3.5% of the EPA limit 10000 µg/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2019 Highest in the city: 1210 µg/L — HOLIDAY ACRES WATER ASSN · 480 people · 2019	3/4	SYR4
Nitrate-Nitrite	318 µg/L 3.2% of the EPA limit 10000 µg/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2019	3/4	SYR4
Barium	21 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2019 Highest in the city: 23.9 µg/L — HOLIDAY ACRES WATER ASSN · 480 people · 2019	2/4	SYR4
Combined Uranium	4.183 µg/L 14% of the EPA limit 30 µg/L Highest in the city: HOLIDAY ACRES WATER ASSN · 480 people · 2016	1/4	SYR4
Di(2-ethylhexyl) Phthalate	3.39 µg/L 57% of the EPA limit 6 µg/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2018	1/4	SYR4
Arsenic	2.18 µg/L 22% of the EPA limit 10 µg/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2019	2/4	SYR4
Gross Alpha, Excl. Radon And U	0.7960 pCi/L 5.3% of the EPA limit 15 pCi/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2016 Highest in the city: 1.55 pCi/L — ROCKY BEACH WATER DIST · 115 people · 2016	2/4	SYR4
Combined Radium (-226 And -228)	0.4900 pCi/L 9.8% of the EPA limit 5 pCi/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2013	2/4	SYR4
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: SPIRIT LAKE CITY OF · 2,825 people · 2023 Highest in the city: 0.0030 mg/L — ROCKY BEACH WATER DIST · 115 people · 2023	4/4	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 Spirit Lake

Supplier	Population served
SPIRIT LAKE CITY OF	2,825
HOLIDAY ACRES WATER ASSN	480
ROCKY BEACH WATER DIST	115
WEST SEASONS ACRES HOA	31

Frequently asked questions about Spirit Lake tap water

Is Spirit Lake tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Spirit Lake. 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 Spirit Lake?

4 public water suppliers report drinking-water monitoring for Spirit Lake, Idaho to the EPA. Each is listed above with its population served.

What contaminants are in Spirit Lake's water?

The contaminants EPA monitoring detected in Spirit Lake include Nitrate, Nitrate-Nitrite, Barium, Combined Uranium, Di(2-ethylhexyl) Phthalate. 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.