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Water system · PWSID AZ0407100

TEMPE CITY OF

TEMPE, AZ · ~165,000 people served

Check your exact address → TEMPE overview
48
Fair
PurityRadar safety score

PWSID

AZ0407100

State

Arizona

City

TEMPE

Population served

165,000

Primary source

Surface water

Score history

▼ 52 points — the score moved from 100 to 48 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 48

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Mar 2025). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

9.3 ppt

limit 4 ppt

Above EPA limit · 2.3×

PFOA

Perfluorooctanoic acid

5.5 ppt

limit 4 ppt

Above EPA limit · 1.4×

PFHxS

Perfluorohexanesulfonic acid

5.8 ppt

limit 10 ppt

Near EPA limit

Lithium

170,000 ppt

limit —

No federal limit

PFHxA

14 ppt

limit —

No federal limit

PFPeA

12 ppt

limit —

No federal limit

PFPeS

7.1 ppt

limit —

No federal limit

PFHpA

6.3 ppt

limit —

No federal limit

PFBA

5.9 ppt

limit —

No federal limit

PFBS

5.9 ppt

limit —

No federal limit

Violations & enforcement

268

Violations on record

0

Unaddressed

2

Health-based

129

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2019. Official EPA record →

Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · EPA contaminant 2039 began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Monitoring & reporting · Cyanide began Jan 2018 Resolved
Treatment technique · EPA contaminant 0800 health-based began Oct 2017 Resolved
Monitoring & reporting · EPA contaminant 2039 began Oct 2017 Resolved

Recent enforcement actions

  • State action · SIE Feb 2019
  • State action · SIE Feb 2019
  • State action · SIA Feb 2019
  • State action · SIA Feb 2019
  • State action · SIA Feb 2019
  • State action · SIE Feb 2019
  • State action · SIA Feb 2019
  • State action · SIE Feb 2019

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Copper

1 station · latest Apr 2022

0.00285 · max 0.0033 mg/L · 6

Arsenic

1 station · latest Apr 2022

0.0045 · max 0.0065 mg/L · 3

Manganese

1 station · latest Apr 2022

0.024 · max 0.027 mg/L · 3

Lead

1 station · latest Jan 2022

0.000635 · max 0.00069 mg/L · 2

Fluoride

1 station · latest Apr 2022

0.43 · max 0.43 mg/L · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system AZ0407100 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.