McDonough County, Illinois
11 ZIP codes · Avg score 56/100 · Grade C · Updated 2026-06-03
Within McDonough County, 11 tracked ZIP codes reveal moderate water quality — national standards are generally met, with some documented exceptions.
How McDonough County Compares
How McDonough County Compares
McDonough County scores 5 points below the Illinois state average (61/100) and 12 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: McDonough County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.1 (asthma 10.6%, diabetes 11.4%)
Estimated additional annual cost per homeowner: $1,005, driven primarily by energy_code_gap
Infrastructure: 0.456% avg pipe failure probability, 90% of ZIPs at high risk
82.5% of homes built before 1978 (lead paint era)
Violation History (2022–2023)
→ Stable trendEPA violation counts by year across McDonough County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 3 violations. Past 5 years: 4 total (4 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: $1,005
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,772 housing units in McDonough 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 McDonough 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 McDonough 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 McDonough County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Bardolph | 303 | 4 |
| 2 | Industry | 540 | 3 |
| 3 | Good Hope | 536 | 2 |
| 4 | Sciota | 180 | 2 |
| 5 | Bushnell | 2,972 | 1 |
12 total water systems serve McDonough County.
All ZIP Codes in McDonough County
11 ZIP codes tracked in McDonough County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 61420 | Blandinsville | 70 | B | 0 | $82K |
| 2 | 61422 | Bushnell | 70 | B | 1 | $72K |
| 3 | 61438 | Good Hope | 65 | C | 2 | $152K |
| 4 | 61475 | Sciota | 64 | C | 2 | $159K |
| 5 | 61440 | Industry | 61 | C | 3 (1 health) | $88K |
| 6 | 61411 | Adair | 56 | C | 0 | $96K |
| 7 | 61470 | Prairie City | 56 | C | 0 | $104K |
| 8 | 62374 | Tennessee | 53 | D | 0 | $82K |
| 9 | 61416 | Bardolph | 45 | D | 4 (2 health) | $49K |
| 10 | 62659 | Lincolns New Salem | 40 | D | 0 | — |
| 11 | 62326 | Colchester | 33 | F | 1 | $116K |
Recommended Buyer Guides for McDonough County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Water Filters for Lead — Lead above EPA action level in 1 ZIP code
- Best Lead Paint Test Kits — 82.5% 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 McDonough County, Illinois
Overview
McDonough County in Illinois covers 11 ZIP codes with an average Home Safety Score of C (56/100).
6 of 11 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.