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Water system · PWSID AZ0403702

GRAND CANYON NATIONAL PARK

GRAND CANYON, AZ · ~16,590 people served

Check your exact address → GRAND CANYON overview
100
Excellent
PurityRadar safety score

PWSID

AZ0403702

State

Arizona

City

GRAND CANYON

Population served

16,590

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

260

Violations on record

2

Unaddressed

11

Health-based

194

Enforcement actions

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

Other · EPA contaminant 7500 began Nov 2025 Unaddressed
Other · EPA contaminant 7500 began Sep 2025 Unaddressed
Other · EPA contaminant 7000 began Jul 2025 Resolved
Monitoring & reporting · EPA contaminant 2980 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 2976 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 2979 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 2964 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 2380 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 2955 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 2968 began Apr 2025 Resolved
Monitoring & reporting · EPA contaminant 2378 began Apr 2025 Resolved

Recent enforcement actions

  • State action · SIA Dec 2025
  • State action · SOX Nov 2025
  • State action · SIA Oct 2025
  • State action · SIA Oct 2025
  • State action · SOX Jul 2025
  • State action · SIE Jul 2025
  • State action · SIA Jul 2025
  • State action · SIA Jul 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

Nitrate

2 stations · latest Apr 2023

29 · max 68.3 mg/l as N · 16

Uranium

2 stations · latest Apr 2023

6 · max 6.3 ug/l · 8

Arsenic

2 stations · latest Apr 2023

4.5 · max 4.8 ug/l · 7

Copper

2 stations · latest Apr 2023

0.65 · max 11 ug/l · 7

Lead

2 stations · latest Apr 2023

0.13 · max 0.2 ug/l · 7

Manganese

2 stations · latest Apr 2023

5.6 · max 23 ug/l · 6

Fluoride

2 stations · latest Apr 2023

0.13 · max 0.15 mg/l · 5

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 AZ0403702 — 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.