Water report · not indexed
What is in the water at 85251
2 public water systems serve this ZIP code in the federal records. Everything below comes from EPA monitoring data, and everything missing is named.
PHOENIX CITY OF
PWSID AZ0407025 · AZ · serves 1,695,000 people
PFAS and lithium
3 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 71 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 160 µg/L | 53 | 8/8/2023 |
| PFBS | 0.016 µg/L | 12 | 7/24/2023 |
| PFBA | 0.006 µg/L | 6 | 7/24/2023 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
Median hardness 57 mg/L as CaCO₃, measured at 17 stations serving this system across 64 results, 2015-06-29 to 2026-04-22. Measured in the water source and distribution area, not at a tap, and not in your home.
SCOTTSDALE CITY OF
PWSID AZ0407098 · AZ · serves 241,361 people
PFAS and lithium
2 compounds detected at or above the reporting limit under EPA’s UCMR 5 monitoring, across 19 samples.
| Compound | Highest detected | Samples | Most recent |
|---|---|---|---|
| lithium | 90 µg/L | 18 | 9/17/2025 |
| PFBS | 0.0032 µg/L | 1 | 6/25/2025 |
A detection is a measurement, not a violation and not a health finding. EPA states that UCMR 5 results do not indicate compliance or non-compliance with any limit.
Health-based violations
No open health-based violation on record. This covers MCL, treatment technique and MRDL violations in SDWIS that have not been returned to compliance. It excludes monitoring and reporting violations, which are the large majority nationally, so this is not “no violations”, and SDWIS completeness varies by state.
Hardness
No hardness measurement. Hardness is measured at environmental monitoring stations, and none fell inside this system’s service area. That is a gap in where monitoring happens, not a finding about the water.
What this report cannot tell you
Every figure describes water at a sampling point: a treatment plant, an entry point to the distribution system, or a monitoring station. None of it describes water arriving at your tap. Plumbing between the two can add lead and copper, and if your home was built before 1986 a test kit tells you something no federal dataset can.
Sources: EPA UCMR 5 occurrence (final release, frozen July 2026) · EPA SDWIS health-based violations · USGS and state monitoring via the Water Quality Portal · EPA Public Water System Service Area Boundaries v3. Compiled 2026-09-01.