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Lakewood, CO · 251,778 people served · EPA data 2021–2026

Tap water quality in Lakewood, Colorado

Lakewood's water systems logged 13 health-based EPA violations in 2021–2026, most recently in 2026 — 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.

C+Fair
Lakewood water grade: C+
Fair — our A–F grade from this city's EPA compliance record, relative to Colorado and the nation. How we grade →
Health-based violations, 2021–202613
Arsenic7
Stage 1 Disinfectants And Disinfection Byproducts Rule3
Combined Uranium2
Lead And Copper Rule Revisions1
Consolidated Mutual Maple Grove81,400 served
Green Mountain Wsd49,400 served
Bancroft Clover Wsd44,000 served
Bear Creek Wsd30,000 served
Colorado quality rank#13 / 51 (86.7/100)
Colorado avg hardness185 PPM (very hard)
Want to know what's actually in your Lakewood water?

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 home

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Lakewood tap water FAQ

Is tap water safe to drink in Lakewood?

Lakewood's systems logged 13 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 Lakewood's water?

Consolidated Mutual Maple Grove (serving about 81,400 people); Green Mountain Wsd (serving about 49,400 people); Bancroft Clover Wsd (serving about 44,000 people); Bear Creek Wsd (serving about 30,000 people). Data: EPA Safe Drinking Water Information System, July 2026.

How hard is the water in Lakewood?

City-level hardness isn't published in a single federal dataset, but Colorado averages 185 PPM — "very hard" on the USGS scale. Your utility's water quality report lists Lakewood'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 Lakewood?

With 13 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.

Want to know what's actually in your Lakewood water?

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 home

We may earn a commission if you request quotes through this link. It costs you nothing and never affects the data we publish.