Water Quality in CHEYENNE, OK (73628)

EPA violation data for public water systems serving ZIP code 73628.

123

Total Violations

Health-Based

111

Monitoring / Reporting

112

Resolved

What does this mean?

112 of 123 violations have been resolved. 12 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 111 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 9 Population served: 1,259

Violations Detail (123 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
E. COLI	Monitoring	0	N/A	Sep 11, 2025	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Chlorine	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	Eye and nose irritation; stomach discomfort
TTHM	Health-Based	N/A	0.084	Jun 30, 2025	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
TTHM	Health-Based	N/A	0.085	Mar 31, 2025	Resolved	N/A
TTHM	Health-Based	N/A	0.085	Mar 31, 2025	Resolved	N/A
TTHM	Health-Based	N/A	0.089	Dec 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.089	Dec 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.089	Dec 31, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 29, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 29, 2024	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 2024	Resolved	N/A
E. COLI	Monitoring	0	N/A	Oct 30, 2024	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Oct 30, 2024	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.088	Sep 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.088	Sep 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.088	Sep 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Chlorine	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Eye and nose irritation; stomach discomfort
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2024	Active	N/A
Chlorine	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2024	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
CARBON, TOTAL	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2022	Active	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2022	Active	N/A
2,4-D	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	Eye and nose irritation; stomach discomfort

Violation Timeline

2025(7)

E. COLI

Sep 11Active

Chlorine

Jul 31Resolved

TTHM

Jun 30Resolved

Lead and Copper Rule

Jun 30Active

Lead and Copper Rule

Jun 30Active

TTHM

Mar 31Resolved

TTHM

Mar 31Resolved

2024(40)

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 29Resolved

TTHM

Dec 29Resolved

Chlorine

Oct 31Resolved

Chlorine

Oct 31Resolved

Chlorine

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

Revised Total Coliform Rule

Oct 31Resolved

E. COLI

Oct 30Active

E. COLI

Oct 30Active