Trempealeau County, Wisconsin
11 ZIP codes · Avg score 74/100 · Grade B · Updated 2026-06-04
Trempealeau County's tap water quality puts it in the upper tier nationally; the 11 ZIP codes here record few health-based violations.
How Trempealeau County Compares
How Trempealeau County Compares
Trempealeau County scores 8 points above the Wisconsin state average (66/100) and 6 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Trempealeau County, Wisconsin
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14 (asthma 10.6%, diabetes 12.3%)
Estimated additional annual cost per homeowner: $990, driven primarily by flood
Infrastructure: 0.381% avg pipe failure probability, 18% of ZIPs at high risk
64.4% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Trempealeau County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 3 violations. Past 5 years: 7 total (7 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $990
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
13,762 housing units in Trempealeau County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Trempealeau County
Remediation costs are relatively manageable for most homeowners in Trempealeau County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Trempealeau County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Trempealeau County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Galesville Waterworks | 1,679 | 14 |
| 2 | Country Road Estates | 120 | 14 |
| 3 | Arcadia Waterworks | 3,737 | 9 |
| 4 | Dodge Sanitary District 1 | 120 | 8 |
| 5 | Ettrick Waterworks | 536 | 5 |
13 total water systems serve Trempealeau County.
All ZIP Codes in Trempealeau County
11 ZIP codes tracked in Trempealeau County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 54758 | Osseo | 83 | B | 0 | $210K |
| 2 | 54760 | Pigeon Falls | 83 | B | 1 | $207K |
| 3 | 54627 | Ettrick | 81 | B | 5 | $217K |
| 4 | 54770 | Strum | 81 | B | 1 | $213K |
| 5 | 54773 | Whitehall | 79 | B | 4 (1 health) | $166K |
| 6 | 54612 | Arcadia | 78 | B | 0 | $190K |
| 7 | 54616 | Blair | 77 | B | 1 (1 health) | $171K |
| 8 | 54661 | Trempealeau | 73 | B | 0 | $252K |
| 9 | 54747 | Independence | 70 | B | 0 | $176K |
| 10 | 54630 | Galesville | 57 | C | 9 (1 health) | $262K |
| 11 | 54625 | Dodge | 55 | C | 8 (3 health) | $182K |
Recommended Buyer Guides for Trempealeau County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Water Filters for Lead — Lead above EPA action level in 2 ZIP codes
- Best Lead Paint Test Kits — 64.4% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Trempealeau County, Wisconsin
Overview
Trempealeau County in Wisconsin covers 11 ZIP codes with an average Home Safety Score of B (74/100).
7 of 11 ZIP codes have recorded EPA violations. 6 health-based violations have been documented.
← Back to Wisconsin water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.