La Paz County · Arizona · EPA SDWIS 2026Q2
Parker Water Quality
What's in Parker's water
Total Trihalomethanes (TTHM)
Violation on record
22 EPA violations on record (most recent 2025). 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.
Fluoride
Violation on record
17 EPA violations on record (most recent 2025). Fluoride occurs naturally in groundwater and is also added by many utilities to reduce tooth decay. At high natural levels it can damage developing teeth and, over long exposure, weaken bones. The federal limit targets these high-level health effects rather than the low levels used for dental benefit.
Haloacetic Acids (HAA5)
Violation on record
8 EPA violations on record (most recent 2025). 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.
Water hardness
very hard
Parker'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
EPCOR - LAKESIDE
- Population served
- 1,775
- PWSID
- AZ0415010
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