Is Blackfoot, ID Tap Water Safe? Quality & Contaminants

What was found in Blackfoot'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	3631.5 µg/L 36% of the EPA limit 10000 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019 Highest in the city: 6217 µg/L — FOUR SEASONS WATER COMPANY · 96 people · 2019	11/12	SYR4
Nitrate-Nitrite	3660 µg/L 37% of the EPA limit 10000 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019 Highest in the city: 4740 µg/L — FOUR SEASONS WATER COMPANY · 96 people · 2019	10/12	SYR4
Fluoride	630 µg/L 16% of the EPA limit 4000 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019 Highest in the city: 900 µg/L — IDLE WHEELS MHP CAT LLC · 85 people · 2019	12/12	SYR4
Barium	85.2 µg/L 4.3% of the EPA limit 2000 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019 Highest in the city: 340 µg/L — ROSE GARDEN MOBILE HOME PARK · 84 people · 2019	12/12	SYR4
Lithium	48.5 µg/L No EPA limit set Main supplier: BLACKFOOT CITY OF · 13,224 people · 2024	1/12	UCMR-5
Copper	10 µg/L 0.8% of the EPA limit 1300 µg/L Highest in the city: GROVELAND WATER AND SEWER DIST · 295 people · 2017	2/12	SYR4
Gross Alpha, Excl. Radon And U	6.25 pCi/L 42% of the EPA limit 15 pCi/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019	6/12	SYR4
Lead	5 µg/L 33% of the EPA limit 15 µg/L Highest in the city: SUNSET SUBD · 43 people · 2017	2/12	SYR4
Selenium	4 µg/L 8% of the EPA limit 50 µg/L Highest in the city: COUNTRY HAVEN UTILITIES · 150 people · 2019	1/12	SYR4
Arsenic	3.5 µg/L 35% of the EPA limit 10 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019	12/12	SYR4
TTHM	2.81 µg/L 3.5% of the EPA limit 80 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019	1/12	SYR4
Combined Uranium	2.045 µg/L 6.8% of the EPA limit 30 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019 Highest in the city: 2.29 µg/L — COUNTRY HAVEN UTILITIES · 150 people · 2019	7/12	SYR4
Chromium	2 µg/L 2% of the EPA limit 100 µg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019	4/12	SYR4
Combined Radium (-226 And -228)	1.7736 pCi/L 35% of the EPA limit 5 pCi/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2019 Highest in the city: 1.9005 pCi/L — ROSE GARDEN MOBILE HOME PARK · 84 people · 2019	8/12	SYR4
Toluene	1.72 µg/L 0.2% of the EPA limit 1000 µg/L Highest in the city: RIVERVIEW ACRES 2 · 29 people · 2019	1/12	SYR4
Di(2-ethylhexyl) Phthalate	1.42 µg/L 24% of the EPA limit 6 µg/L Highest in the city: RIVERSTONE SUBDIVISION · 50 people · 2015	1/12	SYR4
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: BLACKFOOT CITY OF · 13,224 people · 2026 Highest in the city: 0.0080 mg/L — SUNSET SUBD · 43 people · 2023	12/12	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 Blackfoot

Supplier	Population served
BLACKFOOT CITY OF	13,224
GROVELAND WATER AND SEWER DIST	295
SNAKE RIVER VIEW ESTATES	175
COUNTRY HAVEN UTILITIES	150
FOUR SEASONS WATER COMPANY	96
RIVERSIDE ESTATES	90
IDLE WHEELS MHP CAT LLC	85
ROSE GARDEN MOBILE HOME PARK	84
RIVERSTONE SUBDIVISION	50
SUNSET SUBD	43
RIVERVIEW ACRES WATER ASSN 1	33
RIVERVIEW ACRES 2	29

Frequently asked questions about Blackfoot tap water

Is Blackfoot tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Blackfoot. 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 Blackfoot?

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

What contaminants are in Blackfoot's water?

The contaminants EPA monitoring detected in Blackfoot include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Lithium. 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.