Montgomery County, Illinois
16 ZIP codes · Avg score 70/100 · Grade B · Updated 2026-06-03
Throughout Montgomery County, the 16 monitored ZIP codes show low violation rates and healthy safety scores — a pattern that puts the county well above the state baseline for drinking water quality.
How Montgomery County Compares
How Montgomery County Compares
Montgomery County scores 9 points above the Illinois state average (61/100) and 2 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Montgomery County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.3 (asthma 10.3%, diabetes 12.6%)
Estimated additional annual cost per homeowner: $918, driven primarily by energy_code_gap
Infrastructure: 0.451% avg pipe failure probability, 88% of ZIPs at high risk
75.8% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Montgomery County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 15 violations. Past 5 years: 30 total (30 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
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: $918
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,611 housing units in Montgomery 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 Montgomery County
Remediation costs are relatively manageable for most homeowners in Montgomery 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 Montgomery 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 Montgomery County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Ej Water Cooperative | 29,720 | 50 |
| 2 | Donnellson | 213 | 19 |
| 3 | Litchfield | 6,648 | 8 |
| 4 | Mount Olive | 2,193 | 8 |
| 5 | Benld | 1,612 | 8 |
20 total water systems serve Montgomery County.
All ZIP Codes in Montgomery County
16 ZIP codes tracked in Montgomery County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62075 | Nokomis | 83 | B | 0 | $87K |
| 2 | 62051 | Irving | 81 | B | 2 | $100K |
| 3 | 62560 | Raymond | 81 | B | 1 | $98K |
| 4 | 62017 | Coffeen | 79 | B | 5 | $102K |
| 5 | 62015 | Butler | 78 | B | 4 (1 health) | $101K |
| 6 | 62049 | Hillsboro | 78 | B | 4 | $107K |
| 7 | 62089 | Taylor Springs | 76 | B | 1 | $70K |
| 8 | 62056 | Litchfield | 75 | B | 8 | $120K |
| 9 | 62032 | Fillmore | 71 | B | 5 (1 health) | $67K |
| 10 | 62533 | Farmersville | 68 | C | 3 | $117K |
| 11 | 62572 | Waggoner | 64 | C | 7 | $202K |
| 12 | 62094 | Witt | 63 | C | 0 | $63K |
| 13 | 62538 | Harvel | 63 | C | 1 | $84K |
| 14 | 62019 | Donnellson | 61 | C | 19 (7 health) | $103K |
| 15 | 62011 | Bingham | 53 | D | 0 | — |
| 16 | 62076 | Ohlman | 53 | D | 0 | $93K |
Recommended Buyer Guides for Montgomery County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 75.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Montgomery County, Illinois
Overview
Montgomery County in Illinois covers 16 ZIP codes with an average Home Safety Score of B (70/100).
12 of 16 ZIP codes have recorded EPA violations. 9 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.