Water Quality in HAYWARD, WI (54843)

EPA violation data for public water systems serving ZIP code 54843.

136

Total Violations

Health-Based

121

Monitoring / Reporting

134

Resolved

What does this mean?

134 of 136 violations have been resolved. 15 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 121 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: 357 Population served: 26,321

Violations Detail (136 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Aug 31, 2025	Active	N/A
LEAD AND COPPER RULE REVISIONS	Monitoring	N/A	N/A	Jul 1, 2025	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 3, 2025	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 3, 2025	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 3, 2025	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 3, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	May 3, 2025	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	May 3, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Jan 31, 2025	Resolved	N/A
Lead and Copper Rule	Health-Based	N/A	N/A	Dec 10, 2024	Resolved	N/A
Lead and Copper Rule	Health-Based	N/A	N/A	Dec 10, 2024	Resolved	N/A
Lead and Copper Rule	Health-Based	N/A	N/A	Dec 10, 2024	Resolved	N/A
Lead and Copper Rule	Health-Based	N/A	N/A	Dec 10, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2024	Resolved	N/A
E. COLI	Monitoring	0	N/A	Jul 16, 2024	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 16, 2024	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 16, 2024	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	Jul 16, 2024	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Feb 29, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Nitrate	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Lead and Copper 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	Health-Based	N/A	N/A	May 17, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 17, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 17, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Mar 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
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
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
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
Revised Total Coliform 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
Revised Total Coliform 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
Revised Total Coliform 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
Revised Total Coliform 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
Revised Total Coliform 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
Revised Total Coliform 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
Public Notice	Monitoring	N/A	N/A	Jun 22, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Jun 22, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 23, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 23, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 23, 2022	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	May 23, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 17, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 17, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 17, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 17, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 16, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 16, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 16, 2022	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 16, 2022	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Public Notice	Monitoring	N/A	N/A	Dec 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Nov 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
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
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
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	May 31, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 20, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(12)

Revised Total Coliform Rule

Aug 31Active

Revised Total Coliform Rule

Aug 31Active

LEAD AND COPPER RULE REVISIONS

Jul 1Resolved

Revised Total Coliform Rule

May 3Resolved

Revised Total Coliform Rule

May 3Resolved

Revised Total Coliform Rule

May 3Resolved

Revised Total Coliform Rule

May 3Resolved

Public Notice

May 3Resolved

Public Notice

May 3Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

Revised Total Coliform Rule

Jan 31Resolved

2024(18)

Lead and Copper Rule

Dec 10Resolved

Lead and Copper Rule

Dec 10Resolved

Lead and Copper Rule

Dec 10Resolved

Lead and Copper Rule

Dec 10Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

Revised Total Coliform Rule

Nov 30Resolved

E. COLI

Jul 16Resolved

E. COLI

Jul 16Resolved

E. COLI

Jul 16Resolved

E. COLI

Jul 16Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

Revised Total Coliform Rule

Feb 29Resolved

How Does This Compare?

HAYWARD (54843) has 136 recorded violations, including 15 health-based. 2 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.

Water Quality in HAYWARD, WI (54843)

What does this mean?

Violations Detail (136 total)

Lead & Copper Levels

Violation Timeline

2025(12)

2024(18)

2023(34)

2022(49)

2021(23)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code