Florence County, Wisconsin
2 ZIP codes · Avg score 65/100 · Grade C · Updated 2026-06-03
Tracking 2 ZIP codes in Florence County reveals a mixed picture — tap water quality varies meaningfully by location.
How Florence County Compares
How Florence County Compares
Florence County scores 1 points below the Wisconsin state average (66/100) and 3 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 14.9 (asthma 10.7%, diabetes 14.3%)
Estimated additional annual cost per homeowner: $600, driven primarily by energy_code_gap
Infrastructure: 0.385% avg pipe failure probability, 50% of ZIPs at high risk
56.5% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Florence County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 2 violations. Past 5 years: 3 total (3 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: $600
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,347 housing units in Florence 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 Florence County
Remediation costs are relatively manageable for most homeowners in Florence 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 Florence County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
All ZIP Codes in Florence County
2 ZIP codes tracked in Florence County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 54121 | Florence | 77 | B | 14 (3 health) | $177K |
| 2 | 54542 | Long Lake | 53 | D | 0 | $157K |
Recommended Buyer Guides for Florence County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- Best Lead Paint Test Kits — 56.5% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Overview
Florence County in Wisconsin covers 2 ZIP codes with an average Home Safety Score of C (65/100).
1 of 2 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.