Pierce County, Wisconsin
10 ZIP codes · Avg score 61/100 · Grade C · Updated 2026-06-03
Across Pierce County's 10 ZIP codes, water safety results are uneven — a portion of systems carry active or recent violations, while others meet standards without issues.
How Pierce County Compares
How Pierce County Compares
Pierce County scores 5 points below the Wisconsin state average (66/100) and 7 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Pierce County, Wisconsin
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 10.7%, diabetes 9.8%)
Estimated additional annual cost per homeowner: $1,015, driven primarily by flood
Infrastructure: 0.399% avg pipe failure probability, 33% of ZIPs at high risk
64.8% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Pierce County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 4 violations. Past 5 years: 5 total (5 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: $1,015
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
11,150 housing units in Pierce 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 Pierce County
Remediation costs are relatively manageable for most homeowners in Pierce 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 Pierce 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 Pierce County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Elmwood Waterworks | 798 | 6 |
| 2 | Spring Valley Waterworks | 1,409 | 6 |
| 3 | Plum City Care Center Nursing Home | 120 | 3 |
| 4 | ELLSWORTH WATERWORKS | 3,304 | 2 |
| 5 | Prescott Waterworks | 4,258 | 2 |
11 total water systems serve Pierce County.
All ZIP Codes in Pierce County
10 ZIP codes tracked in Pierce County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 54761 | Plum City | 69 | C | 3 | $187K |
| 2 | 54767 | Spring Valley | 69 | C | 2 | $244K |
| 3 | 54011 | Ellsworth | 66 | C | 2 (1 health) | $278K |
| 4 | 54750 | Maiden Rock | 66 | C | 2 (1 health) | $269K |
| 5 | 54723 | Bay City | 64 | C | 2 | $182K |
| 6 | 54740 | Elmwood | 63 | C | 4 | $226K |
| 7 | 54021 | Prescott | 61 | C | 2 (1 health) | $345K |
| 8 | 54014 | Hager City | 60 | C | 1 | $285K |
| 9 | 54003 | Beldenville | 53 | D | 0 | $322K |
| 10 | 54010 | East Ellsworth | 40 | D | 0 | — |
Recommended Buyer Guides for Pierce County
Filtered against federal data, fitted to local risks.
- Best Lead Paint Test Kits — 64.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- 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 Pierce County, Wisconsin
Overview
Pierce County in Wisconsin covers 10 ZIP codes with an average Home Safety Score of C (61/100).
8 of 10 ZIP codes have recorded EPA violations. 3 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.