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Cochise County · Arizona · EPA SDWIS 2026Q2

Willcox Water Quality

0Good

3 water-quality findings on record in the public supply.

What's in Willcox's water

Total Trihalomethanes (TTHM)

Violation on record

Legal limit80 ppb

2 EPA violations on record (most recent 2023). TTHM form when chlorine used to disinfect water reacts with natural organic matter. Long-term exposure has been linked to increased cancer risk and to harm in pregnancy. Levels often rise in warmer months and in systems with more organic material.

Haloacetic Acids (HAA5)

Violation on record

Legal limit60 ppb

2 EPA violations on record (most recent 2023). HAA5 are a second group of chlorine disinfection byproducts formed when chlorine reacts with organic matter in water. Long-term exposure is associated with increased cancer risk and possible developmental effects. They commonly occur together with trihalomethanes.

Nitrate

Violation on record

Legal limit10 ppm

1 EPA violation on record (most recent 2021). Nitrate enters water mainly from fertilizer runoff, septic systems, and animal waste. High levels can interfere with the blood's ability to carry oxygen, a special danger for infants. Long-term low-level exposure has also been linked to elevated cancer risk in some studies.

Water hardness

very hard

Willcox'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.

Your water provider

CITY OF WILLCOX

Population served
3,236
PWSID
AZ0402035
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