State
Arizona: drinking water records
EPA lists 949 community water systems serving homes in Arizona. 170 took part in EPA's national PFAS survey (UCMR 5), and 57 found at least one PFAS above the level laboratories can measure.
In focus949community water systems
Public records. Clearer context.
0
ZIP reports published
949
community water systems
428
systems with a health-based violation since 2016
74
systems that reached the lead action level since 2016
Counties
- Apache County 63 systems
- Cochise County 50 systems
- Coconino County 54 systems
- Gila County 47 systems
- Graham County 10 systems
- Greenlee County 5 systems
- La Paz County 19 systems
- Maricopa County 111 systems
- Mohave County 56 systems
- Navajo County 77 systems
- Pima County 161 systems
- Pinal County 66 systems
- Santa Cruz County 16 systems
- Yavapai County 107 systems
- Yuma County 19 systems
ZIP reports
Sources
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.