Bayfield County, Wisconsin
12 ZIP codes · Avg score 68/100 · Grade C · Updated 2026-06-03
Bayfield County: 12 ZIP codes, mid-range safety grade.
How Bayfield County Compares
How Bayfield County Compares
Bayfield County scores 2 points above the Wisconsin state average (66/100) and 0 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Bayfield County, Wisconsin
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.7 (asthma 10.9%, diabetes 13.7%)
Estimated additional annual cost per homeowner: $1,163, driven primarily by sea_level
Infrastructure: 0.34% avg pipe failure probability
53.5% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Bayfield County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 6 violations. Past 5 years: 9 total (9 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: $1,163
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,022 housing units in Bayfield 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 Bayfield County
Remediation costs are relatively manageable for most homeowners in Bayfield 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 Bayfield 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 Bayfield County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | IRON RIVER SANITARY DISTRICT | 600 | 11 |
| 2 | Washburn Waterworks | 2,280 | 3 |
| 3 | PORT WING SANITARY DISTRICT | 400 | 2 |
| 4 | Bayfield Waterworks | 488 | 1 |
| 5 | Waterford on the Bay | 45 | 1 |
7 total water systems serve Bayfield County.
All ZIP Codes in Bayfield County
12 ZIP codes tracked in Bayfield County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 54814 | Bayfield | 83 | B | 1 | $236K |
| 2 | 54832 | Drummond | 83 | B | 0 | $228K |
| 3 | 54847 | Iron River | 82 | B | 11 (1 health) | $254K |
| 4 | 54891 | Washburn | 82 | B | 3 (1 health) | $201K |
| 5 | 54865 | Port Wing | 79 | B | 2 | $169K |
| 6 | 54821 | Cable | 63 | C | 0 | $274K |
| 7 | 54850 | La Pointe | 63 | C | 0 | $272K |
| 8 | 54856 | Mason | 63 | C | 0 | $183K |
| 9 | 54820 | Brule | 53 | D | 0 | $236K |
| 10 | 54827 | Cornucopia | 53 | D | 0 | $250K |
| 11 | 54839 | Grand View | 53 | D | 0 | $169K |
| 12 | 54844 | Herbster | 53 | D | 0 | $247K |
Recommended Buyer Guides for Bayfield County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 53.5% of homes built before 1978
Deep Dive Reports
Detailed analysis for Bayfield County, Wisconsin
Overview
Bayfield County in Wisconsin covers 12 ZIP codes with an average Home Safety Score of C (68/100).
4 of 12 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.