Brown County, Wisconsin
22 ZIP codes · Avg score 76/100 · Grade B · Updated 2026-06-03
Brown County maintains reliable drinking water quality across all 22 of its tracked ZIP codes.
How Brown County Compares
How Brown County Compares
Brown County scores 10 points above the Wisconsin state average (66/100) and 8 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Brown County, Wisconsin
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.7 (asthma 10.7%, diabetes 10.6%)
Estimated additional annual cost per homeowner: $907, driven primarily by flood
Infrastructure: 0.339% avg pipe failure probability, 23% of ZIPs at high risk
52.9% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across Brown County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 29 violations. Past 5 years: 47 total (47 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: $907
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
117,583 housing units in Brown 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 Brown County
Remediation costs are relatively manageable for most homeowners in Brown 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 Brown 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 Brown County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Ashwaubenon Waterworks | 17,730 | 74 |
| 2 | Bellevue Waterworks | 16,715 | 74 |
| 3 | GREEN BAY WATERWORKS | 107,369 | 74 |
| 4 | Howard Waterworks | 21,133 | 72 |
| 5 | Allouez Waterworks | 14,156 | 72 |
20 total water systems serve Brown County.
All ZIP Codes in Brown County
22 ZIP codes tracked in Brown County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 54126 | Greenleaf | 83 | B | 0 | $259K |
| 2 | 54162 | Pulaski | 83 | B | 0 | $259K |
| 3 | 54115 | De Pere | 82 | B | 2 (1 health) | $308K |
| 4 | 54208 | Denmark | 82 | B | 3 (1 health) | $245K |
| 5 | 54229 | New Franken | 82 | B | 2 | $278K |
| 6 | 54304 | Green Bay | 81 | B | 6 (2 health) | $201K |
| 7 | 54305 | Green Bay | 81 | B | 6 (2 health) | — |
| 8 | 54306 | Green Bay | 81 | B | 6 (2 health) | — |
| 9 | 54307 | Green Bay | 81 | B | 6 (2 health) | — |
| 10 | 54308 | Green Bay | 81 | B | 6 (2 health) | — |
| 11 | 54324 | Green Bay | 81 | B | 6 (2 health) | — |
| 12 | 54344 | Green Bay | 81 | B | 6 (2 health) | — |
| 13 | 54173 | Suamico | 78 | B | 0 | $340K |
| 14 | 54141 | Little Suamico | 77 | B | 1 (1 health) | $269K |
| 15 | 54311 | Green Bay | 76 | B | 6 (2 health) | $272K |
| 16 | 54313 | Green Bay | 76 | B | 6 (2 health) | $294K |
| 17 | 54301 | Green Bay | 71 | B | 6 (2 health) | $206K |
| 18 | 54302 | Green Bay | 71 | B | 6 (2 health) | $165K |
| 19 | 54303 | Green Bay | 71 | B | 6 (2 health) | $160K |
| 20 | 54155 | Oneida | 63 | C | 0 | $345K |
| 21 | 54180 | Wrightstown | 57 | C | 1 (1 health) | $275K |
| 22 | 54137 | Krakow | 53 | D | 0 | $235K |
Recommended Buyer Guides for Brown County
Filtered against federal data, fitted to local risks.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 52.9% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Brown County, Wisconsin
Overview
Brown County in Wisconsin covers 22 ZIP codes with an average Home Safety Score of B (76/100).
17 of 22 ZIP codes have recorded EPA violations. 28 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.