Macon County, Illinois
18 ZIP codes · Avg score 57/100 · Grade C · Updated 2026-06-03
Spanning 18 ZIP codes, Macon County lands near the national median for water safety — compliance results are mixed, and the county's middle-grade standing reflects genuine variability rather than a single systemic problem.
How Macon County Compares
How Macon County Compares
Macon County scores 4 points below the Illinois state average (61/100) and 11 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Macon County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.6 (asthma 10.8%, diabetes 13.3%)
Estimated additional annual cost per homeowner: $1,250, driven primarily by energy_code_gap
Infrastructure: 0.448% avg pipe failure probability, 83% of ZIPs at high risk
80.1% 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: $1,250
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
47,491 housing units in Macon 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 Macon County
Remediation costs are relatively manageable for most homeowners in Macon 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 Macon 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 Macon County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Decatur | 76,122 | 20 |
| 2 | Harristown | 1,320 | 19 |
| 3 | Long Creek Township Public Water System | 7,850 | 16 |
| 4 | Blue Mound | 1,300 | 14 |
| 5 | Decatur Mhp, Llc | 500 | 12 |
14 total water systems serve Macon County.
All ZIP Codes in Macon County
18 ZIP codes tracked in Macon County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62544 | Macon | 70 | B | 1 | $143K |
| 2 | 62501 | Argenta | 67 | C | 4 | $190K |
| 3 | 61925 | Dalton City | 65 | C | 1 | $117K |
| 4 | 62513 | Blue Mound | 65 | C | 14 (2 health) | $126K |
| 5 | 62535 | Forsyth | 64 | C | 5 (1 health) | $290K |
| 6 | 62551 | Niantic | 64 | C | 2 | $118K |
| 7 | 62525 | Decatur | 61 | C | 2 | — |
| 8 | 62554 | Oreana | 61 | C | 4 | $134K |
| 9 | 62573 | Warrensburg | 61 | C | 4 (1 health) | $147K |
| 10 | 62521 | Decatur | 56 | C | 2 | $120K |
| 11 | 61756 | Maroa | 55 | C | 0 | $183K |
| 12 | 62523 | Decatur | 55 | C | 2 | — |
| 13 | 62524 | Decatur | 55 | C | 2 | — |
| 14 | 62537 | Harristown | 53 | D | 1 | $89K |
| 15 | 62522 | Decatur | 51 | D | 2 | $108K |
| 16 | 62526 | Decatur | 51 | D | 2 | $92K |
| 17 | 62514 | Boody | 40 | D | 0 | $107K |
| 18 | 62532 | Elwin | 40 | D | 0 | $114K |
Recommended Buyer Guides for Macon County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 80.1% 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 Macon County, Illinois
Overview
Macon County in Illinois covers 18 ZIP codes with an average Home Safety Score of C (57/100).
15 of 18 ZIP codes have recorded EPA violations. 4 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.