Door County, Wisconsin
12 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-03
Spanning 12 ZIP codes, Door County lands near the national median for water safety — compliance results are mixed, and the county's middle-grade standing reflects genuine variability rather than a single systemic problem.
How Door County Compares
How Door County Compares
Door County scores 8 points below the Wisconsin state average (66/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Door 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 10.5%, diabetes 13%)
Estimated additional annual cost per homeowner: $756, driven primarily by flood
Infrastructure: 0.362% avg pipe failure probability, 27% of ZIPs at high risk
56.7% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Door County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 1 violation. Past 5 years: 2 total (2 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: $756
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
26,681 housing units in Door 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 Door County
Remediation costs are relatively manageable for most homeowners in Door 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 Door 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 Door County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Oaks the | 135 | 12 |
| 2 | SISTER BAY WATERWORKS | 1,000 | 6 |
| 3 | Heritage Lake Resort | 130 | 6 |
| 4 | Sturgeon Bay Waterworks | 9,700 | 3 |
| 5 | Carlton Heights Mhp Ct 2 | 60 | 3 |
10 total water systems serve Door County.
All ZIP Codes in Door County
12 ZIP codes tracked in Door County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 54217 | Luxemburg | 70 | B | 1 | $255K |
| 2 | 54202 | Baileys Harbor | 67 | C | 6 | $384K |
| 3 | 54209 | Egg Harbor | 67 | C | 6 | $384K |
| 4 | 54234 | Sister Bay | 67 | C | 0 | $420K |
| 5 | 54210 | Ellison Bay | 66 | C | 1 | $356K |
| 6 | 54226 | Maplewood | 66 | C | 0 | — |
| 7 | 54235 | Sturgeon Bay | 59 | C | 3 | $268K |
| 8 | 54212 | Fish Creek | 53 | D | 0 | $481K |
| 9 | 54213 | Forestville | 53 | D | 0 | $187K |
| 10 | 54246 | Washington Island | 53 | D | 0 | $277K |
| 11 | 54204 | Brussels | 40 | D | 0 | $325K |
| 12 | 54211 | Ephraim | 40 | D | 0 | $466K |
Recommended Buyer Guides for Door County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 56.7% of homes built before 1978
- 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 Door County, Wisconsin
Overview
Door County in Wisconsin covers 12 ZIP codes with an average Home Safety Score of C (58/100).
5 of 12 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.