Is Bigfork - Lake Co, MT Tap Water Safe? Quality & Contaminants

What was found in Bigfork - Lake Co'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-Nitrite	1696 µg/L 17% of the EPA limit 10000 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	4/4	SYR4
Copper	1173 µg/L 90% of the EPA limit 1300 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	4/4	SYR4
Nitrate	1060 µg/L 11% of the EPA limit 10000 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2018	3/4	SYR4
Arsenic	580 µg/L 5800% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Barium	175 µg/L 8.8% of the EPA limit 2000 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2017	2/4	SYR4
Fluoride	116 µg/L 2.9% of the EPA limit 4000 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2017 Highest in the city: 150 µg/L — RANCH CO WATER & SEWER DIST THE · 90 people · 2017	3/4	SYR4
TTHM	23.8 µg/L 30% of the EPA limit 80 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Combined Uranium	20.42 µg/L 68% of the EPA limit 30 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2018	2/4	SYR4
Total Haloacetic Acids (HAA5)	20.3 µg/L 34% of the EPA limit 60 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Chloroform	20.15 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Gross Alpha, Excl. Radon And U	13.67 pCi/L 91% of the EPA limit 15 pCi/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2018	2/4	SYR4
Dichloroacetic Acid	11.96 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Lead	7.8 µg/L 52% of the EPA limit 15 µg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	4/4	SYR4
Trichloroacetic Acid	6.6 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Bromodichloromethane	5.67 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Combined Radium (-226 And -228)	2.24 pCi/L 45% of the EPA limit 5 pCi/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2018 Highest in the city: 2.84 pCi/L — CRANE MOUNTAIN ESTATES · 50 people · 2015	2/4	SYR4
Dibromochloromethane	2.55 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Monochloroacetic Acid	1.1 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Bromoform	0.8800 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Dibromoacetic Acid	0.5600 µg/L No EPA limit set Main supplier: RIDGEWOOD ESTATES · 250 people · 2019	1/4	SYR4
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: RIDGEWOOD ESTATES · 250 people · 2025 Highest in the city: 0.0030 mg/L — RANCH CO WATER & SEWER DIST THE · 90 people · 2017	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 Bigfork - Lake Co

Supplier	Population served
RIDGEWOOD ESTATES	250
BEAR CREEK VILLAGE BIGFORK	100
RANCH CO WATER & SEWER DIST THE	90
CRANE MOUNTAIN ESTATES	50

Frequently asked questions about Bigfork - Lake Co tap water

Is Bigfork - Lake Co tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Bigfork - Lake Co. 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 Bigfork - Lake Co?

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

What contaminants are in Bigfork - Lake Co's water?

The contaminants EPA monitoring detected in Bigfork - Lake Co include Nitrate-Nitrite, Copper, Nitrate, Arsenic, Barium. 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.