Water Quality in QUAPAW, OK (74363)

EPA violation data for public water systems serving ZIP code 74363.

169

Total Violations

Health-Based

165

Monitoring / Reporting

153

Resolved

What does this mean?

153 of 169 violations have been resolved. 4 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 165 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: 11 Population served: 9,226

Violations Detail (169 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Chlorine	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
E. COLI	Monitoring	0	N/A	Jul 24, 2025	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 24, 2025	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Consumer Confidence 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
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Glyphosate	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2025	Resolved	Cardiovascular system or reproductive problems
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2024	Active	N/A
Glyphosate	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	Cardiovascular system or reproductive problems
Glyphosate	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
LEAD AND COPPER RULE REVISIONS	Health-Based	N/A	N/A	Oct 16, 2024	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Oct 16, 2024	Active	N/A
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	Monitoring	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	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
Glyphosate	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	Cardiovascular system or reproductive problems
2,4-D	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	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
Chlorine	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Active	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Active	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Active	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Cardiovascular system or reproductive problems
2,4-D	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
2,4-D	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Glyphosate	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Atrazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Cardiovascular system or reproductive problems
Chlorine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Eye and nose irritation; stomach discomfort
Atrazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Cardiovascular system or reproductive problems
Atrazine	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	Cardiovascular system or reproductive problems
2,4-D	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Glyphosate	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
Glyphosate	Monitoring	N/A	N/A	Mar 31, 2024	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	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	Mar 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Eye and nose irritation; stomach discomfort
Public Notice	Monitoring	N/A	N/A	Jan 10, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jan 10, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Nov 28, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Nov 28, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Nov 28, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Nov 28, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Oct 1, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Oct 1, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Oct 1, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
E. COLI	Monitoring	0	N/A	Jul 11, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 11, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 11, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 11, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 11, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Public Notice	Monitoring	N/A	N/A	Apr 26, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Apr 26, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Apr 26, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Apr 26, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Feb 22, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Feb 22, 2022	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 21, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 21, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Lead and Copper 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
Public Notice	Monitoring	N/A	N/A	Sep 28, 2021	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Aug 7, 2021	Active	N/A
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Eye and nose irritation; stomach discomfort
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jun 30, 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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 16, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 16, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 16, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Mar 16, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(12)

Chlorine

Jul 31Resolved

Revised Total Coliform Rule

Jul 31Resolved

E. COLI

Jul 24Active

E. COLI

Jul 24Active

Consumer Confidence Rule

Jun 30Active

Lead and Copper Rule

Jun 30Active

Lead and Copper Rule

Jun 30Active

Glyphosate

Mar 31Resolved

Glyphosate

Mar 31Resolved

Atrazine

Mar 31Resolved

Atrazine

Mar 31Resolved

Atrazine

Mar 31Resolved

2024(56)

Lead and Copper Rule

Dec 31Active

Lead and Copper Rule

Dec 31Active

Glyphosate

Dec 31Resolved

Atrazine

Dec 31Resolved

Atrazine

Dec 31Resolved

Atrazine

Dec 31Resolved

Glyphosate

Dec 31Resolved