Calhoun County, Illinois
7 ZIP codes · Avg score 46/100 · Grade D · Updated 2026-06-03
Across Calhoun County, EPA compliance records for 7 ZIP codes fall well below average — documented health-based violations affect multiple areas, and the county's sustained low grade points to structural rather than temporary shortfalls in the underlying water systems.
How Calhoun County Compares
How Calhoun County Compares
Calhoun County scores 15 points below the Illinois state average (61/100) and 22 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Calhoun County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.6 (asthma 10.1%, diabetes 11.9%)
Estimated additional annual cost per homeowner: $2,864, driven primarily by flood
Infrastructure: 0.432% avg pipe failure probability, 60% of ZIPs at high risk
66.8% 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: $2,864
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,966 housing units in Calhoun 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 Calhoun County
Remediation costs are relatively manageable for most homeowners in Calhoun 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 Calhoun County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 4 systems in Calhoun County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Brussels | 245 | 4 |
| 2 | Il American-hardin | 839 | 1 |
| 3 | Kampsville | 335 | 1 |
| 4 | CALHOUN COUNTY RWD | 4,675 | 0 |
All ZIP Codes in Calhoun County
7 ZIP codes tracked in Calhoun County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62013 | Brussels | 54 | D | 4 (1 health) | $137K |
| 2 | 62047 | Hardin | 54 | D | 0 | $144K |
| 3 | 62053 | Kampsville | 52 | D | 1 | $95K |
| 4 | 62070 | Mozier | 45 | D | 0 | — |
| 5 | 62036 | Golden Eagle | 40 | D | 0 | $222K |
| 6 | 62045 | Hamburg | 40 | D | 0 | $166K |
| 7 | 62065 | Michael | 40 | D | 0 | — |
Recommended Buyer Guides for Calhoun County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 66.8% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- 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 Calhoun County, Illinois
Overview
Calhoun County in Illinois covers 7 ZIP codes with an average Home Safety Score of D (46/100).
2 of 7 ZIP codes have recorded EPA violations. 1 health-based violation 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.
What You Can Do
Calhoun County has a grade of D. Here are steps to protect your household.
Test your tap water
Order a certified lab test kit ($20-$50) to check for lead, bacteria, and other contaminants specific to your ZIP code.
Consider a certified water filter
NSF-certified filters can remove most common contaminants. Match the filter to your test results for best protection. Try our filter matcher
Contact your water utility
Request the latest Consumer Confidence Report (CCR) from your water provider. It details exactly what was found in your water supply.
Check for lead in your home
66.8% of homes in this county were built before 1978. Older plumbing and solder can leach lead into drinking water, especially in the morning.