Madison County, Illinois
30 ZIP codes · Avg score 69/100 · Grade C · Updated 2026-06-03
Across Madison County's 30 ZIP codes, water safety results are uneven — a portion of systems carry active or recent violations, while others meet standards without issues.
How Madison County Compares
How Madison County Compares
Madison County scores 8 points above the Illinois state average (61/100) and 1 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Madison County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.2 (asthma 10.5%, diabetes 11.3%)
Estimated additional annual cost per homeowner: $1,558, driven primarily by flood
Infrastructure: 0.412% avg pipe failure probability, 59% of ZIPs at high risk
69.4% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Madison County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 10 violations. Past 5 years: 23 total (23 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: $1,558
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
116,544 housing units in Madison 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 Madison County
Remediation costs are relatively manageable for most homeowners in Madison 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 Madison 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 Madison County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Pontoon Beach Pwd | 3,325 | 35 |
| 2 | Troy | 16,962 | 34 |
| 3 | Glen Carbon | 12,618 | 32 |
| 4 | Il American-granite City | 27,549 | 30 |
| 5 | Maryville | 10,150 | 28 |
46 total water systems serve Madison County.
All ZIP Codes in Madison County
30 ZIP codes tracked in Madison County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62058 | Livingston | 83 | B | 0 | $102K |
| 2 | 62026 | Edwardsville | 82 | B | 2 (1 health) | — |
| 3 | 62061 | Marine | 81 | B | 1 | $186K |
| 4 | 62062 | Maryville | 81 | B | 1 | $250K |
| 5 | 62097 | Worden | 81 | B | 1 | $213K |
| 6 | 62249 | Highland | 79 | B | 13 (1 health) | $220K |
| 7 | 62010 | Bethalto | 78 | B | 1 | $170K |
| 8 | 62067 | Moro | 78 | B | 5 | $221K |
| 9 | 62048 | Hartford | 77 | B | 2 | $66K |
| 10 | 62084 | Roxana | 77 | B | 2 | $104K |
| 11 | 62024 | East Alton | 76 | B | 1 | $113K |
| 12 | 62034 | Glen Carbon | 75 | B | 4 | $274K |
| 13 | 62006 | Batchtown | 74 | B | 3 | $208K |
| 14 | 62025 | Edwardsville | 72 | B | 2 (1 health) | $296K |
| 15 | 62002 | Alton | 71 | B | 2 | $114K |
| 16 | 62074 | New Douglas | 71 | B | 2 | $264K |
| 17 | 62281 | Saint Jacob | 71 | B | 6 (1 health) | $288K |
| 18 | 62046 | Hamel | 68 | C | 5 | $230K |
| 19 | 62040 | Granite City | 66 | C | 4 | $107K |
| 20 | 62095 | Wood River | 63 | C | 2 | $107K |
| 21 | 62087 | South Roxana | 61 | C | 14 | $87K |
| 22 | 62234 | Collinsville | 61 | C | 11 (1 health) | $162K |
| 23 | 62294 | Troy | 60 | C | 8 (2 health) | $256K |
| 24 | 61937 | Lovington | 58 | C | 0 | $99K |
| 25 | 62018 | Cottage Hills | 55 | C | 0 | $78K |
| 26 | 62060 | Madison | 55 | C | 0 | $54K |
| 27 | 62090 | Venice | 55 | C | 0 | $50K |
| 28 | 62021 | Dorsey | 53 | D | 0 | $278K |
| 29 | 62071 | National Stock Yards | 53 | D | 0 | — |
| 30 | 62201 | East Saint Louis | 50 | D | 0 | $56K |
Recommended Buyer Guides for Madison 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 Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 69.4% 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 Madison County, Illinois
Overview
Madison County in Illinois covers 30 ZIP codes with an average Home Safety Score of C (69/100).
22 of 30 ZIP codes have recorded EPA violations. 7 health-based violations have been documented.
← Back to Illinois 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.