C45/100
Prairie Du Chien Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 6,005 residents · Wisconsin
What's In Prairie Du Chien's Tap Water?
31
Contaminants Tested
1
Exceed EPA Limits
0
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.011 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
PRAIRIE DU CHIEN WATERWORKS
Population Served
6,005
Water Source
Groundwater
System ID
WI6120250
Frequently Asked Questions About Prairie Du Chien Water
Is Prairie Du Chien tap water safe to drink?
Prairie Du Chien, Wisconsin tap water receives a grade of C (45/100), which is considered fair. 1 contaminant(s) exceed EPA maximum contaminant levels and 27 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Prairie Du Chien's water?
Of the 31 contaminants tested in Prairie Du Chien's water supply, the most notable include PFOS. 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Prairie Du Chien have any water quality violations?
Yes, Prairie Du Chien has 27 EPA violation(s) on record, with the most recent in 2013. Violation types include TT, Other, MR. 5 of these are health-based violations, which are the most serious category.
Do I need a water filter in Prairie Du Chien?
Based on EPA data, using a water filter in Prairie Du Chien is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Prairie Du Chien's tap water come from?
Prairie Du Chien's drinking water is sourced from groundwater and supplied by PRAIRIE DU CHIEN WATERWORKS. The system serves approximately 6,005 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Prairie Du Chien's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Prairie Du Chien's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Prairie Du Chien's water compare to other cities in Wisconsin?
Prairie Du Chien's water quality score of 45/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Wisconsin state page to see how all cities in the state compare.
What should I do if I'm concerned about Prairie Du Chien's water quality?
If you have concerns about Prairie Du Chien's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (PRAIRIE DU CHIEN WATERWORKS) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.