Scott County, Illinois
5 ZIP codes · Avg score 61/100 · Grade C · Updated 2026-06-03
Scott County: 5 ZIP codes, mid-range safety grade.
How Scott County Compares
How Scott County Compares
Scott County scores 0 points above the Illinois state average (61/100) and 7 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Scott County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.9 (asthma 10.4%, diabetes 12%)
Estimated additional annual cost per homeowner: $992, driven primarily by energy_code_gap
Infrastructure: 0.446% avg pipe failure probability, 80% of ZIPs at high risk
81.3% 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: $992
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,115 housing units in Scott 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 Scott County
Water safety remediation is a moderate expense relative to home values. Most homeowners can address issues through staged improvements over time.
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 Scott 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 Scott County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Rock Island | 39,018 | 5 |
| 2 | Rock Island Arsenal, Us Army | 7,800 | 5 |
| 3 | Alsey-glasgow Water Commission | 475 | 5 |
| 4 | Smg Water Coop | 3,110 | 5 |
| 5 | Winchester | 1,589 | 5 |
9 total water systems serve Scott County.
All ZIP Codes in Scott County
5 ZIP codes tracked in Scott County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62621 | Bluffs | 65 | C | 0 | $92K |
| 2 | 62663 | Manchester | 65 | C | 2 | $85K |
| 3 | 62694 | Winchester | 62 | C | 5 (3 health) | $108K |
| 4 | 61204 | Rock Island | 58 | C | 5 | — |
| 5 | 62610 | Alsey | 55 | C | 0 | $53K |
Recommended Buyer Guides for Scott County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- Best Lead Paint Test Kits — 81.3% 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 Scott County, Illinois
Overview
Scott County in Illinois covers 5 ZIP codes with an average Home Safety Score of C (61/100).
3 of 5 ZIP codes have recorded EPA violations. 3 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.