Green County, Wisconsin
6 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Within Green County, 6 tracked ZIP codes reveal moderate water quality — national standards are generally met, with some documented exceptions.
How Green County Compares
How Green County Compares
Green County scores 3 points below the Wisconsin state average (66/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Green County, Wisconsin
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.4 (asthma 10.5%, diabetes 11.3%)
Estimated additional annual cost per homeowner: $1,018, driven primarily by energy_code_gap
Infrastructure: 0.422% avg pipe failure probability, 50% of ZIPs at high risk
69.8% of homes built before 1978 (lead paint era)
Violation History (2023–2024)
→ Stable trendEPA violation counts by year across Green County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 4 violations. Past 5 years: 6 total (6 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: $1,018
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
11,617 housing units in Green 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 Green County
Remediation costs are relatively manageable for most homeowners in Green 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 Green 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 Green County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Browntown Waterworks | 256 | 13 |
| 2 | Pleasant View Nursing Home | 260 | 3 |
| 3 | New Glarus Waterworks | 2,348 | 3 |
| 4 | Albany Waterworks | 1,018 | 2 |
| 5 | Monticello Waterworks | 1,217 | 2 |
8 total water systems serve Green County.
All ZIP Codes in Green County
6 ZIP codes tracked in Green County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 53502 | Albany | 69 | C | 2 | $243K |
| 2 | 53566 | Monroe | 69 | C | 1 (1 health) | $204K |
| 3 | 53574 | New Glarus | 69 | C | 3 (1 health) | $316K |
| 4 | 53522 | Browntown | 65 | C | 13 (2 health) | $183K |
| 5 | 53570 | Monticello | 64 | C | 2 (1 health) | $234K |
| 6 | 53550 | Juda | 40 | D | 0 | $227K |
Recommended Buyer Guides for Green County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 69.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Green County, Wisconsin
Overview
Green County in Wisconsin covers 6 ZIP codes with an average Home Safety Score of C (63/100).
5 of 6 ZIP codes have recorded EPA violations. 5 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.