Lincoln County, Wisconsin
6 ZIP codes · Avg score 67/100 · Grade C · Updated 2026-06-03
Within Lincoln County, safety data across 6 ZIP codes suggests a fair but uneven system — violations are present and worth checking at the ZIP level.
How Lincoln County Compares
How Lincoln County Compares
Lincoln County scores 1 points above the Wisconsin state average (66/100) and 1 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Lincoln County, Wisconsin
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.8 (asthma 10.9%, diabetes 13.2%)
Estimated additional annual cost per homeowner: $538, driven primarily by energy_code_gap
Infrastructure: 0.362% avg pipe failure probability, 20% of ZIPs at high risk
57% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Lincoln County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 5 violations. Past 5 years: 8 total (8 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: $538
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
19,627 housing units in Lincoln 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 Lincoln County
Remediation costs are relatively manageable for most homeowners in Lincoln 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 Lincoln 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 Lincoln County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Merrill Waterworks | 9,661 | 6 |
| 2 | Little Florida | 170 | 6 |
| 3 | Deer Run Mobile Home Community | 49 | 6 |
| 4 | Tomahawk Waterworks | 3,180 | 4 |
| 5 | LINCOLN HILLS SCHOOL | 316 | 2 |
All ZIP Codes in Lincoln County
6 ZIP codes tracked in Lincoln County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 54442 | Irma | 82 | B | 2 | $224K |
| 2 | 54452 | Merrill | 82 | B | 6 (1 health) | $163K |
| 3 | 54487 | Tomahawk | 79 | B | 2 (1 health) | $224K |
| 4 | 54435 | Gleason | 53 | D | 0 | $211K |
| 5 | 54532 | Heafford Junction | 53 | D | 0 | — |
| 6 | 54564 | Tripoli | 53 | D | 0 | $171K |
Recommended Buyer Guides for Lincoln County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance — guides surface only when county data warrants them.
- Best Lead Paint Test Kits — 57% of homes built before 1978
Deep Dive Reports
Detailed analysis for Lincoln County, Wisconsin
Overview
Lincoln County in Wisconsin covers 6 ZIP codes with an average Home Safety Score of C (67/100).
3 of 6 ZIP codes have recorded EPA violations. 2 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.