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Water system · PWSID AZ0410112

TUCSON CITY OF

TUCSON, AZ · ~732,906 people served

Check your exact address → TUCSON overview
100
Excellent
PurityRadar safety score

PWSID

AZ0410112

State

Arizona

City

TUCSON

Population served

732,906

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

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

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 Nov 2025). Levels in parts per trillion (ppt).

Lithium

10,000 ppt

limit —

No federal limit

PFBA

8.1 ppt

limit —

No federal limit

Violations & enforcement

2,022

Violations on record

0

Unaddressed

0

Health-based

444

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2025. Official EPA record →

Monitoring & reporting · EPA contaminant 2015 began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 2065 began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 2067 began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 2010 began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 2051 began Jan 2022 Resolved
Monitoring & reporting · EPA contaminant 2005 began Jan 2022 Resolved
Monitoring & reporting · Nitrate began Jan 2021 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began May 2019 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began May 2019 Resolved
Monitoring & reporting · EPA contaminant 4020 began Jan 2019 Resolved
Monitoring & reporting · Combined radium-226/228 began Jan 2019 Resolved
Monitoring & reporting · Uranium began Jan 2019 Resolved

Recent enforcement actions

  • State action · SOX Mar 2025
  • State action · SOX Mar 2025
  • State action · SIE Jan 2025
  • State action · SIA Jan 2025
  • State action · SIE Jan 2025
  • State action · SIA Jan 2025
  • State action · SIE Jan 2025
  • State action · SIA Jan 2025

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

Arsenic

3 stations · latest Oct 2025

3.01 · max 4.98 ug/L · 68

Copper

3 stations · latest Jan 2025

1.33 · max 3.58 ug/L · 55

Fluoride

3 stations · latest Oct 2025

0.44 · max 0.85 mg/L · 33

Manganese

15 stations · latest Dec 2024

0.0287 · max 0.131 mg/L · 33

Nitrate

24 stations · latest Mar 2025

1,520 · max 3,960 ug/L · 29

Lead

3 stations · latest Dec 2024

0.00062 · max 0.005 mg/L · 16

Uranium

1 station · latest Dec 2024

0.00486 · max 0.00689 mg/L · 8

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 AZ0410112 — 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.