Tap water quality in Houston, Texas
Houston's water systems logged 166 health-based EPA violations in 2021–2026, most recently in 2025 — most often lead and copper rule revisions. 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.
Houston tap water FAQ
Is tap water safe to drink in Houston?
Houston's systems logged 166 health-based violations in 2021–2026, most commonly lead and copper rule revisions. 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 Houston's water?
City Of Houston (serving about 2,970,543 people); Clear Lake City Water Authority (serving about 89,702 people); City Of Houston Ud 5 - Kingwood (serving about 80,073 people); Harris County Mud 165 (serving about 40,503 people). Data: EPA Safe Drinking Water Information System, July 2026.
How hard is the water in Houston?
City-level hardness isn't published in a single federal dataset, but Texas averages 268 PPM — "very hard" on the USGS scale. Your utility's water quality report lists Houston'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 Houston?
With 166 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.