States ›Arizona ›Apache County ›St. Johns

St. Johns, AZ Tap Water Quality 2026

Water quality report for St. Johns, AZ — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at St. Johns's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: St Johns City Of PWSID: AZ0401012 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. No PFAS was detected.

A

St. Johns earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: not detected
PFAS tested, none detected
40 violations since 2015, 0 health-based
No violations currently open
St. Johns's lead level vs. all Arizona community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Arizona utilities
Population Served
3417
~1275 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
40 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2025 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Unaddressed
Consumer Confidence Rule OTHER — — 2025 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2025 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2025 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2025 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2023 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2022 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2022 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2020 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2020 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2020 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Consumer Confidence Rule OTHER — — 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Consumer Confidence Rule OTHER — — 2019 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2019 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2018 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2018 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2017 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2016 Resolved
Consumer Confidence Rule OTHER — — 2016 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 Resolved
Consumer Confidence Rule OTHER — — 2016 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2016 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2016 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2015 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2015 Resolved
Consumer Confidence Rule OTHER — — 2015 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2015 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

40 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility St Johns City Of
PWSID AZ0401012
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 3,417
Service connections 1,275
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is St. Johns tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does St. Johns water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to St. Johns? ▼
St Johns City Of (PWSID AZ0401012). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-04-23. No significant deficiencies were recorded.

What Should St. Johns Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

Nearby Cities in Arizona

Eagar, Az Tap Water Quality 2026 Apache Springerville, Az Tap Water Quality 2026 Apache McNary, Az Tap Water Quality 2026 Apache Alpine, Az Tap Water Quality 2026 Apache Sanders, Az Tap Water Quality 2026 Apache Vernon, Az Tap Water Quality 2026 Apache