Water Quality in MADISON, WI (53707)

EPA violation data for public water systems serving ZIP code 53707.

615

Total Violations

35

Health-Based

580

Monitoring / Reporting

608

Resolved

What does this mean?

608 of 615 violations have been resolved. 35 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 580 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: 494 Population served: 55,752

Violations Detail (615 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
E. COLIMonitoring0N/AOct 2, 2025ActiveSevere gastrointestinal illness; may be fatal in vulnerable populations
Revised Total Coliform RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Revised Total Coliform RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Revised Total Coliform RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Revised Total Coliform RuleHealth-BasedN/AN/AJun 30, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/AMay 31, 2025ResolvedN/A
E. COLIMonitoring0N/AMay 1, 2025ResolvedSevere gastrointestinal illness; may be fatal in vulnerable populations

Lead & Copper Levels

Violation Timeline

2025(21)

E. COLI

34

Oct 2Active

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

Revised Total Coliform Rule

3A

May 31Resolved

E. COLI

34

May 1Resolved

E. COLI

34

May 1Resolved

E. COLI

34

May 1Resolved

E. COLI

34

May 1Resolved

E. COLI

34

Feb 12Resolved

E. COLI

34

Feb 12Resolved

E. COLI

34

Feb 12Resolved

E. COLI

34

Feb 12Resolved

E. COLI

34

Jan 25Resolved

E. COLI

34

Jan 25Resolved

E. COLI

34

Jan 25Resolved

E. COLI

34

Jan 25Resolved

2024(160)

E. COLI

34

Oct 26Resolved

E. COLI

34

Oct 26Resolved

E. COLI

34

Oct 26Resolved

E. COLI

34

Oct 26Resolved

Public Notice

75

Oct 16Active

LEAD AND COPPER RULE REVISIONS

4G

Oct 16Resolved

Public Notice

75

Oct 16Active

LEAD AND COPPER RULE REVISIONS

2E

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

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

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

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

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

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

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

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

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

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

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Revised Total Coliform Rule

3A

Sep 30Resolved

Public Notice

75

Sep 30Active

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

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

Revised Total Coliform Rule

3B

Aug 31Resolved

Revised Total Coliform Rule

3B

Aug 31Resolved

Revised Total Coliform Rule

3B

Aug 31Resolved

Revised Total Coliform Rule

3B

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

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

Aug 31Resolved

E. COLI

34

Aug 24Resolved

E. COLI

34

Aug 24Resolved

E. COLI

34

Aug 24Resolved

E. COLI

34

Aug 24Resolved

E. COLI

34

Aug 23Resolved

E. COLI

34

Aug 23Resolved

E. COLI

34

Aug 23Resolved

E. COLI

34

Aug 23Resolved

E. COLI

34

Aug 23Resolved

E. COLI

34

Aug 23Resolved

E. COLI

34

Aug 23Resolved

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

Public Notice

75

Jul 31Resolved

Public Notice

75

Jul 31Resolved

Revised Total Coliform Rule

3B

Jul 31Resolved

Revised Total Coliform Rule

3B

Jul 31Resolved

Revised Total Coliform Rule

3B

Jul 31Resolved

Revised Total Coliform Rule

3B

Jul 31Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

1A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

Revised Total Coliform Rule

3A

Jun 30Resolved

E. COLI

34

Jun 26Resolved

E. COLI

34

Jun 26Resolved

E. COLI

34

Jun 26Resolved

E. COLI

34

Jun 26Resolved

Revised Total Coliform Rule

4C

Jun 22Resolved

Revised Total Coliform Rule

4C

Jun 22Resolved

Revised Total Coliform Rule

4C

Jun 22Resolved

Revised Total Coliform Rule

4C

Jun 22Resolved

Revised Total Coliform Rule

2D

May 1Resolved

Revised Total Coliform Rule

2D

May 1Resolved

Revised Total Coliform Rule

2D

May 1Resolved

Revised Total Coliform Rule

2D

May 1Resolved

Public Notice

75

May 1Resolved

Public Notice

75

May 1Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Apr 30Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Mar 31Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

Revised Total Coliform Rule

3A

Feb 29Resolved

How Does This Compare?

MADISON (53707) has 615 recorded violations, including 35 health-based. 7 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 →

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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