States ›Arizona ›Graham County ›Bylas

Bylas, AZ Tap Water Quality 2026

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

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

Main Utility: Scua Bylas PWSID: 090400110 Updated: 2026 Q2
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7 violations currently open

Lead is 5.00 ppb, 33% of the action level. PFAS has never been sampled at this system.

F

Bylas earns an F for water quality

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

Lead: 5.00 ppb — 33% of the federal action level
PFAS never sampled at this system
84 violations since 2015, 21 health-based
7 violations currently open
Bylas's lead level vs. all Arizona community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 5.00 ppb — 33% of the federal action level
✓ Lower lead than 24% of Arizona utilities
Population Served
1338
~571 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
7
7 open of 84 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
33% of EPA action level
5.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 5.00 ppb, 33% 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
Groundwater Rule TREATMENT TECHNIQUE — — 2026 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2026 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2026 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2026 Unaddressed
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2026 Unaddressed
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2026 Archived
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Public Notice OTHER — — 2025 Unaddressed
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2025 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2025 Resolved
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2025 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2025 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2025 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2025 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2025 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2025 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2025 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2025 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2025 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2025 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2025 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2025 Resolved
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2025 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2025 Resolved
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2025 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Archived
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2025 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Unaddressed
Revised Total Coliform Rule MCL EXCEEDANCE — — 2024 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2024 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2024 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2024 Unaddressed
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2024 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2023 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2023 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2023 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2023 Addressed
Revised Total Coliform Rule REPORTING FAILURE — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2023 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2022 Resolved
Public Notice OTHER — — 2022 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2022 Resolved
Consumer Confidence Rule OTHER — — 2022 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2021 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2019 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2019 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2019 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2019 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2018 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2018 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2018 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2018 Resolved
Public Notice OTHER — — 2018 Resolved
E. COLI MONITORING AND REPORTING — 0 2018 Resolved
E. COLI MONITORING AND REPORTING — 0 2018 Resolved
E. COLI MONITORING AND REPORTING — 0 2017 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2017 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2016 Resolved
Consumer Confidence Rule OTHER — — 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 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

7 violations remain open, out of 84 recorded since 2015 (21 health-based).

About the Main Water System

Utility Scua Bylas
PWSID 090400110
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 1,338
Service connections 571
Systems serving this area 1
Regulator US EPA (tribal primacy)
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Bylas tap water safe to drink? ▼
No federal limit is exceeded on record. 7 violation(s) remain open. Lead is 5.00 ppb, 33% of the action level.
Does Bylas 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 Bylas? ▼
Scua Bylas (PWSID 090400110). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-04-01. Inspectors recorded 3 significant deficiencies.

What Should Bylas 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
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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