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WaterSafeCheck

Cottage Grove, WI Tap Water Quality

Water safety reports for all 1 ZIP code in Cottage Grove, Wisconsin

Average Score

69/100

Health Violations

1

ZIP Codes

1

High Lead Risk

0

of 1 ZIP codes

C

About Tap Water in Cottage Grove, WI

Water quality in Cottage Grove, WI is currently rated with a moderate C grade (average score: 69/100 across 1 ZIP code). This rating indicates that while the water provided by Cottage Grove Waterworks is treated and regulated, there have been notable compliance issues or contaminant detections recently. Residents should stay informed about the specific challenges affecting their local supply.

Over the past 5 years, Cottage Grove has recorded 1 health-based violation. While occasional violations can occur due to seasonal changes or temporary infrastructure issues, Cottage Grove Waterworks is legally required to resolve these quickly and notify the public via their annual Consumer Confidence Report. The city's water supply, primarily drawn from ground water, is treated to address these specific contaminants.

Fortunately, the modeled risk for widespread lead exposure in Cottage Grove's municipal water is relatively low compared to national averages. However, because lead typically enters drinking water through the corrosion of older, individual home plumbing rather than the main supply lines, residents in homes built before 1986 should still exercise caution by running the tap before use.

Health-Based Contaminant Violations in Cottage Grove

EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Cottage Grove water systems over the past 5 years.

Stage 2 DBP Rule

Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.

Water Quality by ZIP Code — Cottage Grove, WI

Click any ZIP code for the full water quality report

C
53527

Cottage Grove, WI

Score: 69/1001 violation

Frequently Asked Questions — Cottage Grove Water Quality

Is tap water safe to drink in Cottage Grove, WI?+
Tap water in Cottage Grove has a grade of C, indicating compliance concerns in recent years. Families with young children or pregnant women should consider using a certified NSF/ANSI 53 water filter for drinking and cooking.
What is the water quality score for Cottage Grove?+
The average water quality score across 1 ZIP code in Cottage Grove, WI is 69/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Cottage Grove have lead in its tap water?+
Lead risk ratings in Cottage Grove are relatively low based on EPA monitoring data. However, lead in home plumbing is a separate concern — if your home was built before 1986, individual tap testing is recommended.
How do I get the water quality report for Cottage Grove?+
Each ZIP code in Cottage Grove has a full water quality report on this site — click any ZIP code below. You can also get the annual Consumer Confidence Report (CCR) from your local water utility. The CCR is required to be published every year by July 1 and contains actual contaminant measurements and violation history.
Where does Cottage Grove's tap water come from?+
Tap water in Cottage Grove, WI primarily comes from ground water. Groundwater systems pump water from underground aquifers, which is naturally filtered through soil and rock but can still contain naturally occurring contaminants.

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