Tap water quality in Waukesha, Wisconsin
Waukesha's water systems logged 60 health-based EPA violations in 2021–2026, most recently in 2023 — most often combined radium (-226 and -228). 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.
Waukesha tap water FAQ
Is tap water safe to drink in Waukesha?
Waukesha's systems logged 60 health-based violations in 2021–2026, most commonly combined radium (-226 and -228). 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 Waukesha's water?
Waukesha Water Utility (serving about 70,718 people); Schoenstatt Sisters Of Mary (serving about 80 people). Data: EPA Safe Drinking Water Information System, July 2026.
How hard is the water in Waukesha?
City-level hardness isn't published in a single federal dataset, but Wisconsin averages 140 PPM — "hard" on the USGS scale. Your utility's water quality report lists Waukesha'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 Waukesha?
With 60 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.