Prairie Du Chien, WI 53821

3 water systems • 6,505 residents

Severe water quality issues - filtration essential

Score: 19/100

Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.

Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts

Contaminants Detected

552

Violations on Record

Health-Based Violations

Recent Violations

Grade Breakdown

Contaminant Count0 / 25

Violation History2 / 25

Contaminant Severity9 / 25

System Compliance0 / 15

Enforcement History0 / 10

Total Score19%

19 / 100 points

Recommended Water Filters

✓Point-of-Use Carbon Filter (NSF-certified for lead)
✓Reverse Osmosis or Ion Exchange Filter
✓Ultraviolet (UV) Purification
✓Activated Carbon Filter (disinfection byproducts)
✓Whole Home Carbon Filter System

Compare filter types in our Filter Guide →

Consult a water quality specialist for personalized recommendations.

Prairie Du Chien vs WI & National Average

Detected Contaminants

54 contaminants detected across water systems serving this ZIP code

Contaminant	Category
Atrazine	Agricultural
Nitrate	Agricultural
Simazine	Agricultural
Total Haloacetic Acids (HAA5)	Disinfection Byproduct
TTHM	Disinfection Byproduct
Lead and Copper Rule	Heavy Metal
LEAD AND COPPER RULE REVISIONS	Heavy Metal
Coliform (TCR)	Microorganism
1,1,1-Trichloroethane	Other
1,1,2-Trichloroethane	Other
1,2-Dichloropropane	Other
2,4-D	Other
2,4,5-TP	Other
Aldicarb	Other
Aldicarb sulfone	Other
Aldicarb sulfoxide	Other
BHC-GAMMA	Other
Carbofuran	Other
Chlordane	Other
Consumer Confidence Rule	Other
Dalapon	Other
DICHLOROMETHANE	Other
Dinoseb	Other
Endrin	Other
Groundwater Rule	Other
Heptachlor	Other
Heptachlor epoxide	Other
Hexachlorocyclopentadiene	Other
LASSO	Other
Methoxychlor	Other
OXAMYL	Other
Pentachlorophenol	Other
Picloram	Other
Public Notice	Other
Total Polychlorinated Biphenyls (PCB)	Other
Toxaphene	Other
1,1-Dichloroethylene	Volatile Organic
1,2-Dichloroethane	Volatile Organic
1,2,4-Trichlorobenzene	Volatile Organic
Benzene	Volatile Organic
Carbon tetrachloride	Volatile Organic
CHLOROBENZENE	Volatile Organic
cis-1,2-Dichloroethylene	Volatile Organic
Ethylbenzene	Volatile Organic
HEXACHLOROBENZENE	Volatile Organic
o-Dichlorobenzene	Volatile Organic
p-Dichlorobenzene	Volatile Organic
Styrene	Volatile Organic
Tetrachloroethylene	Volatile Organic
Toluene	Volatile Organic
trans-1,2-Dichloroethylene	Volatile Organic
Trichloroethylene	Volatile Organic
Vinyl chloride	Volatile Organic
Xylenes, Total	Volatile Organic

Water System Information

Systems Serving This ZIP:: PRAIRIE DU CHIEN WATERWORKS, HOMESTEADER LLC THE, BRIDGEPORT SAN DIST NO 1
Population Served:: 6,505
Systems With Violations:: 3 of 3
Major Violations:: 453
Enforcement Actions:: 551

Nearby Areas

53826

Wauzeka • 5.9 mi away

52158

Marquette • 7.1 mi away

54626

Eastman • 9.6 mi away

54645

Mount Sterling • 10.7 mi away

54654

Seneca • 10.7 mi away

53817

Patch Grove • 11.1 mi away

Frequently Asked Questions

What does the grade mean?

Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.

Is my tap water safe to drink?

Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.

How often is the data updated?

We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.

What filters do you recommend?

Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.