Water Quality in WISCONSIN DELLS, WI (53965)

EPA violation data for public water systems serving ZIP code 53965.

181

Total Violations

105

Health-Based

76

Monitoring / Reporting

181

Resolved

What does this mean?

181 of 181 violations have been resolved. 105 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 76 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: 304 Population served: 49,662

Violations Detail (181 total)

ContaminantCategoryMCL LimitMeasuredDateStatusHealth Effects
LEAD AND COPPER RULE REVISIONSMonitoringN/AN/AJul 1, 2025ResolvedN/A
Lead and Copper RuleMonitoringN/AN/ADec 31, 2024ResolvedN/A
Lead and Copper RuleMonitoringN/AN/ADec 31, 2024ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/ASep 30, 2024ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/ASep 30, 2024ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/ASep 30, 2024ResolvedN/A
Revised Total Coliform RuleMonitoringN/AN/ASep 30, 2024ResolvedN/A
Gross Alpha, Excl. Radon and UMonitoringN/AN/ASep 30, 2024ResolvedN/A
Gross Alpha, Excl. Radon and UMonitoringN/AN/ASep 30, 2024ResolvedN/A
Gross Alpha, Excl. Radon and UMonitoringN/AN/ASep 30, 2024ResolvedN/A

Lead & Copper Levels

Violation Timeline

2025(1)

LEAD AND COPPER RULE REVISIONS

4H

Jul 1Resolved

2024(18)

Lead and Copper Rule

66

Dec 31Resolved

Lead and Copper Rule

66

Dec 31Resolved

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

Gross Alpha, Excl. Radon and U

03

Sep 30Resolved

Gross Alpha, Excl. Radon and U

03

Sep 30Resolved

Gross Alpha, Excl. Radon and U

03

Sep 30Resolved

Gross Alpha, Excl. Radon and U

03

Sep 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

71

Jun 30Resolved

Consumer Confidence Rule

72

Jun 30Resolved

Consumer Confidence Rule

72

Jun 30Resolved

Revised Total Coliform Rule

4C

May 19Resolved

Revised Total Coliform Rule

4C

May 19Resolved

Revised Total Coliform Rule

4C

May 19Resolved

Revised Total Coliform Rule

4C

May 19Resolved

How Does This Compare?

WISCONSIN DELLS (53965) has 181 recorded violations, including 105 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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