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Summit, AZ Tap Water Quality 2026

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

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

Main Utility: Summit Water Coop PWSID: AZ0420595 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 7.00 ppb, 47% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Summit earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 7.00 ppb — 47% of the federal action level
PFAS never sampled at this system
19 violations since 2015, 0 health-based
No violations currently open
Summit's lead level vs. all Arizona community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 7.00 ppb — 47% of the federal action level
✓ Lower lead than 12% of Arizona utilities
Population Served
1308
~21 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
19 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
47% of EPA action level
7.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 7.00 ppb, 47% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Public Notice OTHER — — 2021 Resolved
Consumer Confidence Rule OTHER — — 2021 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2021 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Consumer Confidence Rule OTHER — — 2016 Resolved
Consumer Confidence Rule OTHER — — 2016 Resolved
Consumer Confidence Rule OTHER — — 2015 Resolved
Consumer Confidence Rule OTHER — — 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

19 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 Summit Water Coop
PWSID AZ0420595
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 1,308
Service connections 21
Systems serving this area 8
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Summit tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 7.00 ppb, 47% of the action level.
Does Summit water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Summit? ▼
Summit Water Coop (PWSID AZ0420595), one of 8 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-05-03. No significant deficiencies were recorded.

What Should Summit Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
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.

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