Tap water quality in Iowa City, Iowa
Iowa City's water systems logged 4 health-based EPA violations in 2021–2026, most recently in 2025 — 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.
Iowa City tap water FAQ
Is tap water safe to drink in Iowa City?
Iowa City's systems logged 4 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 Iowa City's water?
Iowa City Water Department (serving about 68,753 people); University Water System (serving about 26,684 people); Lake Ridge, Incorporated (serving about 1,300 people); Modern Manor, Inc (serving about 915 people). Data: EPA Safe Drinking Water Information System, July 2026.
How hard is the water in Iowa City?
City-level hardness isn't published in a single federal dataset, but Iowa averages 130 PPM — "hard" on the USGS scale. Your utility's water quality report lists Iowa City'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 Iowa City?
With 4 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.