Cheyenne, OK Tap Water Quality 2026

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

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

Main Utility: Cheyenne PWSID: OK1010803 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS has never been sampled at this system.

Cheyenne earns a B for water quality

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

Lead: not detected

PFAS never sampled at this system

57 violations since 2015, 33 health-based

No violations currently open

Cheyenne's lead level vs. all Oklahoma community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: Not detected — 0% of the federal action level

✓ Lower lead than % of Oklahoma utilities

Population Served

271

~498 connections

Water Source

Surface water

Drawn from surface water — SDWIS source code SW

Active Violations

57 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)

Contaminant	Type	Measured	Limit	Period	Status
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2025	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2025	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2025	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2025	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2025	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2025	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2025	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2025	Resolved
TTHM	MCL EXCEEDANCE	0.084 MG/L	0.080 mg/L	2025	Resolved
TTHM	MCL EXCEEDANCE	0.085 MG/L	0.080 mg/L	2025	Resolved
TTHM	MCL EXCEEDANCE	0.089 MG/L	0.080 mg/L	2025	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2024	Resolved
LEAD AND COPPER RULE REVISIONS	TREATMENT TECHNIQUE	—	—	2024	Resolved
LEAD AND COPPER RULE REVISIONS	REPORTING FAILURE	—	—	2024	Resolved
TTHM	MCL EXCEEDANCE	0.088 MG/L	0.080 mg/L	2024	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2024	Resolved
Chlorine	MONITORING AND REPORTING	—	4.0 mg/L	2024	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2024	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2024	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2023	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2023	Resolved
Revised Total Coliform Rule	MONITORING FAILURE	—	—	2023	Resolved
TTHM	MONITORING AND REPORTING	—	0.080 mg/L	2023	Resolved
Total Haloacetic Acids (HAA5)	MONITORING AND REPORTING	—	0.060 mg/L	2023	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2020	Resolved
TTHM	MCL EXCEEDANCE	0.101 MG/L	0.080 mg/L	2020	Resolved
TTHM	MCL EXCEEDANCE	0.098 MG/L	0.080 mg/L	2020	Resolved
TTHM	MCL EXCEEDANCE	0.098 MG/L	0.080 mg/L	2019	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2019	Archived
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2019	Archived
TTHM	MCL EXCEEDANCE	0.096 MG/L	0.080 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.1 MG/L	0.080 mg/L	2019	Resolved
TTHM	MCL EXCEEDANCE	0.098 MG/L	0.080 mg/L	2019	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2018	Resolved
TTHM	MCL EXCEEDANCE	0.099 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.096 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.096 MG/L	0.080 mg/L	2018	Resolved
TTHM	MCL EXCEEDANCE	0.099 MG/L	0.080 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.115 MG/L	0.080 mg/L	2017	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2017	Resolved
TTHM	MCL EXCEEDANCE	0.12 MG/L	0.080 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.087 MG/L	0.080 mg/L	2017	Resolved
TTHM	MCL EXCEEDANCE	0.092 MG/L	0.080 mg/L	2016	Resolved
CARBON, TOTAL	MONITORING AND REPORTING	—	TT	2016	Resolved
TTHM	MCL EXCEEDANCE	0.118 MG/L	0.080 mg/L	2016	Resolved
TTHM	MCL EXCEEDANCE	0.123 MG/L	0.080 mg/L	2016	Resolved
TTHM	MCL EXCEEDANCE	0.121 MG/L	0.080 mg/L	2016	Resolved
Coliform (TCR)	MONITORING AND REPORTING	—	5% of samples	2015	Resolved
TTHM	MCL EXCEEDANCE	0.118 MG/L	0.080 mg/L	2015	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2015	Resolved
TTHM	MCL EXCEEDANCE	0.113 MG/L	0.080 mg/L	2015	Resolved
Interim Enhanced Surface Water Treatment Rule	TREATMENT TECHNIQUE	—	—	2015	Resolved
TTHM	MCL EXCEEDANCE	0.082 MG/L	0.080 mg/L	2015	Resolved
TTHM	MCL EXCEEDANCE	0.105 MG/L	0.080 mg/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

57 violations are on record since 2015, of which 33 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Cheyenne

PWSID OK1010803

Water source Surface water — Drawn from surface water — SDWIS source code SW

Population served 271

Service connections 498

Systems serving this area 2

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Cheyenne tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open.

Does Cheyenne 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 Cheyenne? ▼

Cheyenne (PWSID OK1010803), one of 2 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW

When was this system last inspected? ▼

It was last inspected on 2026-03-18. No significant deficiencies were recorded.

What Should Cheyenne Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

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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