Water Quality in COQUILLE, OR (97423)

EPA violation data for public water systems serving ZIP code 97423.

158

Total Violations

Health-Based

120

Monitoring / Reporting

153

Resolved

What does this mean?

153 of 158 violations have been resolved. 38 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 120 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: 16 Population served: 5,720

Violations Detail (158 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Surface Water Treatment Rule	Health-Based	N/A	N/A	Aug 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2025	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Active	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2025	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Jun 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Apr 9, 2025	Active	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Mar 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Mar 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Mar 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Mar 31, 2025	Resolved	N/A
E. COLI	Monitoring	0	N/A	Mar 23, 2025	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jan 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jan 31, 2025	Resolved	N/A
Surface Water Treatment Rule	Health-Based	N/A	N/A	Jan 31, 2025	Resolved	N/A
Lead and Copper Rule	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	Health-Based	N/A	N/A	Oct 16, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2024	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2024	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2024	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2024	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	May 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	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
TTHM	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Nov 30, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Nov 30, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Nov 30, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment 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
Surface Water Treatment 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
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2023	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Feb 28, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Oct 31, 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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	N/A
Lead and Copper 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	May 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 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	Mar 27, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 28, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 28, 2022	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Feb 28, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2022	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Dec 31, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Dec 31, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Dec 31, 2021	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Surface Water Treatment 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
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Nov 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 23, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
Surface Water Treatment Rule	Monitoring	N/A	N/A	Aug 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2021	Resolved	N/A
Interim Enhanced Surface Water Treatment Rule	Health-Based	N/A	N/A	Jun 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 28, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(46)

Surface Water Treatment Rule

Aug 31Resolved

Interim Enhanced Surface Water Treatment Rule

Aug 31Resolved

Interim Enhanced Surface Water Treatment Rule

Aug 31Resolved

Interim Enhanced Surface Water Treatment Rule

Jul 31Resolved

Interim Enhanced Surface Water Treatment Rule

Jul 31Resolved

Lead and Copper Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Active

Surface Water Treatment Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Active

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Interim Enhanced Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Interim Enhanced Surface Water Treatment Rule

May 31Resolved

Interim Enhanced Surface Water Treatment Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

Surface Water Treatment Rule

May 31Resolved

Interim Enhanced Surface Water Treatment Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Interim Enhanced Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Resolved

Surface Water Treatment Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Interim Enhanced Surface Water Treatment Rule

Apr 30Resolved

Public Notice

Apr 9Active

Surface Water Treatment Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

Surface Water Treatment Rule

Mar 31Resolved

E. COLI

Mar 23Active

Surface Water Treatment Rule

Feb 28Resolved

Surface Water Treatment Rule

Feb 28Resolved

Surface Water Treatment Rule

Feb 28Resolved

Surface Water Treatment Rule

Feb 28Resolved

Surface Water Treatment Rule

Jan 31Resolved

Surface Water Treatment Rule

Jan 31Resolved

Surface Water Treatment Rule

Jan 31Resolved

2024(18)

Lead and Copper Rule

Dec 31Resolved

LEAD AND COPPER RULE REVISIONS

Oct 16Active

LEAD AND COPPER RULE REVISIONS

Oct 16Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Sep 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Lead and Copper Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

Jun 30Resolved

Interim Enhanced Surface Water Treatment Rule

May 31Resolved

Interim Enhanced Surface Water Treatment Rule

May 31Resolved

Interim Enhanced Surface Water Treatment Rule

May 31Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Mar 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

How Does This Compare?

COQUILLE (97423) has 158 recorded violations, including 38 health-based. 5 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

Reverse Osmosis System

Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.

Targets:Lead, Copper, Arsenic, Mercury, Cadmium

Look for:NSF/ANSI 58 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Activated Carbon Filter

Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.

Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor

Look for:NSF/ANSI 42 & 53 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove.

Water Quality in COQUILLE, OR (97423)

What does this mean?

Violations Detail (158 total)

Lead & Copper Levels

Violation Timeline

2025(46)

2024(18)

2023(40)

2022(36)

2021(18)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Activated Carbon Filter

UV Water Purifier

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