Water Quality in LOUISVILLE, OH (44641)

EPA violation data for public water systems serving ZIP code 44641.

Total Violations

Health-Based

Monitoring / Reporting

Resolved

What does this mean?

74 of 88 violations have been resolved. 17 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 71 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: 43 Population served: 17,645

Violations Detail (88 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jul 30, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	May 28, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Apr 26, 2025	Active	N/A
Public Notice	Monitoring	N/A	N/A	Mar 28, 2025	Active	N/A
E. COLI	Monitoring	0	N/A	Feb 26, 2025	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Feb 26, 2025	Active	Severe gastrointestinal illness; may be fatal in vulnerable populations
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Dec 22, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Dec 22, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Active	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Apr 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Dec 28, 2023	Active	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
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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jul 31, 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
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2023	Active	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Jun 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	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
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 1, 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
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jan 5, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jan 5, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Jan 4, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Jan 4, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Jan 4, 2023	Resolved	N/A
Groundwater Rule	Health-Based	N/A	N/A	Jan 4, 2023	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 28, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 28, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 28, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Sep 28, 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
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
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 1, 2022	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 28, 2021	Active	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 28, 2021	Active	N/A
Public Notice	Monitoring	N/A	N/A	Jul 29, 2021	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 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
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

Lead & Copper Levels

Violation Timeline

2025(9)

Revised Total Coliform Rule

Aug 31Resolved

Public Notice

Jul 30Active

Public Notice

May 28Active

Revised Total Coliform Rule

May 1Active

Revised Total Coliform Rule

May 1Active

Public Notice

Apr 26Active

Public Notice

Mar 28Active

E. COLI

Feb 26Active

E. COLI

Feb 26Active

2024(11)

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Revised Total Coliform Rule

Dec 31Resolved

Consumer Confidence Rule

Dec 22Resolved

Consumer Confidence Rule

Dec 22Resolved

Consumer Confidence Rule

Jun 30Active

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

Revised Total Coliform Rule

Apr 30Resolved

How Does This Compare?

LOUISVILLE (44641) has 88 recorded violations, including 17 health-based. 14 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.

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 LOUISVILLE, OH (44641)

What does this mean?

Violations Detail (88 total)

Lead & Copper Levels

Violation Timeline

2025(9)

2024(11)

2023(42)

2022(14)

2021(12)

How Does This Compare?

Recommended Water Filters

UV Water Purifier

Nearby ZIP Codes

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