Is Fort Harrison, MT Tap Water Safe? Quality & Contaminants

What was found in Fort Harrison'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
Copper	508.65 µg/L 39% of the EPA limit 1300 µg/L Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2017	1/1	SYR4
TTHM	90 µg/L 113% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Chloroform	83.08 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Total Haloacetic Acids (HAA5)	58.89 µg/L 98% of the EPA limit 60 µg/L Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Lead	35.3 µg/L 235% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2017	1/1	SYR4
Trichloroacetic Acid	31.63 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Dichloroacetic Acid	22.78 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Bromodichloromethane	10.68 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Monochloroacetic Acid	5.483 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Dibromochloromethane	2.596 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Bromoform	1.7 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Dibromoacetic Acid	0.5500 µg/L No EPA limit set Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2019	1/1	SYR4
Lead	0.0070 mg/L 47% of the EPA limit 0.0150 mg/L Main supplier: VA MEDICAL CENTER HELENA · 1,275 people · 2023	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 Fort Harrison

Supplier	Population served
VA MEDICAL CENTER HELENA	1,275

Frequently asked questions about Fort Harrison tap water

Is Fort Harrison tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Fort Harrison. 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 Fort Harrison?

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

What contaminants are in Fort Harrison's water?

The contaminants EPA monitoring detected in Fort Harrison include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Lead. 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.