Jefferson County, Indiana
6 ZIP codes · Avg score 70/100 · Grade B · Updated 2026-06-03
Although county size varies, Jefferson County's 6 ZIP codes share reliably safe tap water records and above-average compliance scores.
How Jefferson County Compares
How Jefferson County Compares
Jefferson County scores 10 points above the Indiana state average (60/100) and 2 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Jefferson County, Indiana
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.4 (asthma 11.5%, diabetes 13.3%)
Estimated additional annual cost per homeowner: $1,332, driven primarily by flood
Infrastructure: 0.368% avg pipe failure probability, 50% of ZIPs at high risk
57.8% of homes built before 1978 (lead paint era)
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: $1,332
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
15,666 housing units in Jefferson 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 Jefferson County
Remediation costs are relatively manageable for most homeowners in Jefferson 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 Jefferson 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 Jefferson County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Madison Water Department | 15,323 | 18 |
| 2 | Kent Water Company | 6,750 | 18 |
| 3 | Vevay Water Department | 1,883 | 12 |
| 4 | Madison State Hospital | 1,375 | 11 |
| 5 | Rykers Ridge Water Company | 2,050 | 11 |
10 total water systems serve Jefferson County.
All ZIP Codes in Jefferson County
6 ZIP codes tracked in Jefferson County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 47224 | Canaan | 83 | B | 1 | $274K |
| 2 | 47231 | Dupont | 81 | B | 4 | $94K |
| 3 | 47043 | Vevay | 73 | B | 1 | $171K |
| 4 | 47243 | Hanover | 70 | B | 3 | $172K |
| 5 | 47250 | Madison | 60 | C | 11 | $180K |
| 6 | 47017 | Cross Plains | 53 | D | 0 | $183K |
Recommended Buyer Guides for Jefferson County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 57.8% of homes built before 1978
- 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 Jefferson County, Indiana
Overview
Jefferson County in Indiana covers 6 ZIP codes with an average Home Safety Score of B (70/100).
5 of 6 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Indiana 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.