Greenlee County · Arizona · EPA SDWIS 2026Q2
Duncan Water Quality
Meets federal standards on record — only monitoring/reporting notes, no measured exceedance. Water is very hard.
Is Duncan tap water safe to drink?
Duncan's public water is regulated to meet EPA legal limits. The EPA SDWIS record shows 2 contaminants on file, led by Total Trihalomethanes (TTHM). Local water is very hard. But meeting legal limits isn't the same as zero-risk. Our Water Score rates it 94/100. See the breakdown below, or pull a free water report to learn what's actually coming out of your tap.
What's really in Duncan's water
Water hardness
very hard
Duncan's water is very hard. Hardness isn't a health risk, but it drives scale on fixtures and water heaters, shortens appliance life, and leaves skin and hair dry.
Monitoring & reporting notes
EPA records below are administrative or monitoring/reporting compliance items — not measured exceedances of the legal limit. They do not, on their own, mean the water is unsafe.
Total Trihalomethanes (TTHM)
Monitoring / reporting note
Monitoring / reporting compliance note — not a measured exceedance. 1 EPA record on file (most recent 2020).
Haloacetic Acids (HAA5)
Monitoring / reporting note
Monitoring / reporting compliance note — not a measured exceedance. 1 EPA record on file (most recent 2020).
EPA violations may be administrative or monitoring/reporting issues rather than measured exceedances of a health limit. A utility appearing on this list does not by itself mean the water is unsafe to drink. Health-based goals (EPA MCLG / WHO) are health targets and are often stricter than the legal limit (the federal MCL). The only way to know what is in your specific home is to test your own water.
Your water provider
DUNCAN TOWN OF
- Population served
- 605
- PWSID
- AZ0406001
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