Tap water quality in Helena, Montana
Helena's water systems logged 15 health-based EPA violations in 2021–2026, most recently in 2025 — most often arsenic. Health-based violations mean a federal limit or treatment standard was exceeded; check the systems below and your utility's annual report for specifics.
Averages describe states, not your faucet. A certified home water test screens for lead, nitrates, bacteria and dozens of other contaminants — the same categories EPA regulates.
Test your water at homeWe may earn a commission if you request quotes through this link. It costs you nothing and never affects the data we publish.
Helena tap water FAQ
Is tap water safe to drink in Helena?
Helena's systems logged 15 health-based violations in 2021–2026, most commonly arsenic. A violation is a red flag for a period of time, not a permanent condition — your utility's current Consumer Confidence Report shows today's status, and a certified home test shows what's at your tap.
Who supplies Helena's water?
Helena Water System (serving about 32,091 people); East Helena City Of (serving about 2,114 people); Helena Leisure Llc (serving about 1,200 people); Jefferson Hills Wua (serving about 780 people). Data: EPA Safe Drinking Water Information System, July 2026.
How hard is the water in Helena?
City-level hardness isn't published in a single federal dataset, but Montana averages 95 PPM — "moderately hard" on the USGS scale. Your utility's water quality report lists Helena's exact hardness, or a $10 test strip tells you in a minute. If it comes back over 120 PPM, see our water softener guidance in the purification calculator.
Do I need a water filter in Helena?
With 15 health-based violations on record in 2021–2026, a certified filter is reasonable insurance here: reverse osmosis ($150–$1,300 installed, Angi 2026) covers lead, nitrates and PFAS at the tap. Test first ($50–$200) so you buy for what's actually present.
Averages describe states, not your faucet. A certified home water test screens for lead, nitrates, bacteria and dozens of other contaminants — the same categories EPA regulates.
Test your water at homeWe may earn a commission if you request quotes through this link. It costs you nothing and never affects the data we publish.