Water Quality in LOUISVILLE, CO (80027)

EPA violation data for public water systems serving ZIP code 80027.

170

Total Violations

15

Health-Based

155

Monitoring / Reporting

170

Resolved

What does this mean?

170 of 170 violations have been resolved. 15 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 155 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: 40,075

Violations Detail (170 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
Lead and Copper RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Lead and Copper RuleMonitoringN/AN/AJun 30, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AFeb 28, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AFeb 28, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AFeb 28, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AFeb 21, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AFeb 21, 2025ResolvedN/A
Public NoticeMonitoringN/AN/AFeb 21, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AJan 31, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AJan 31, 2025ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(19)

Lead and Copper Rule

51

Jun 30Resolved

Lead and Copper Rule

51

Jun 30Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Revised Total Coliform Rule

3A

Feb 28Resolved

Public Notice

76

Feb 21Resolved

Public Notice

76

Feb 21Resolved

Public Notice

76

Feb 21Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Revised Total Coliform Rule

3A

Jan 31Resolved

Public Notice

76

Jan 29Resolved

Public Notice

76

Jan 29Resolved

Public Notice

76

Jan 29Resolved

Revised Total Coliform Rule

5A

Jan 10Resolved

Revised Total Coliform Rule

5A

Jan 10Resolved

Revised Total Coliform Rule

5A

Jan 10Resolved

Revised Total Coliform Rule

5A

Jan 10Resolved

2024(44)

Nitrate

03

Dec 31Resolved

Nitrate

03

Dec 31Resolved

Nitrate

03

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Revised Total Coliform Rule

3A

Dec 31Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Revised Total Coliform Rule

3A

Nov 30Resolved

Public Notice

76

Nov 23Resolved

Public Notice

76

Nov 23Resolved

Public Notice

76

Nov 23Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

Public Notice

76

Oct 31Resolved

Public Notice

76

Oct 31Resolved

Public Notice

76

Oct 31Resolved

Revised Total Coliform Rule

3A

Oct 31Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Nitrate

03

Sep 30Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Revised Total Coliform Rule

3A

Aug 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Revised Total Coliform Rule

3A

Jul 31Resolved

Nitrate

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

Nitrate

03

Jun 30Resolved

How Does This Compare?

LOUISVILLE (80027) has 170 recorded violations, including 15 health-based. All violations have been resolved, which is a positive sign for current water quality. 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 →

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.

Nearby ZIP Codes

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