McHenry County, Illinois
20 ZIP codes · Avg score 73/100 · Grade B · Updated
ZipCheckup grade for McHenry County: B.
This ZIP looks solid, with a few items worth a quick check.
Across McHenry County's 20 ZIP codes, EPA compliance data shows above-average performance - violation rates are minimal, none of the county's systems have triggered health-based MCL exceedances in recent cycles, and the county's scores have stayed above the national baseline across every recent reporting period.
How McHenry County Compares
How McHenry County Compares
McHenry County scores 5 points above the Illinois state average (68/100) and 0 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: McHenry County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 9.6%, diabetes 10.5%)
Estimated additional annual cost per homeowner: $1,840, driven primarily by flood
49.1% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across McHenry County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 9 violations. Past 5 years: 19 total (19 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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,840
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
127,664 housing units in McHenry 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 McHenry County
Remediation costs are relatively manageable for most homeowners in McHenry 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 McHenry County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving McHenry County
8 community water systems serving McHenry County.
- B
- B
- B
- B
- B
- C
35 total water systems serve McHenry County.
Systems with the most violations in McHenry County
5 water systems with recorded EPA violations.
- C
- B
- C
- B
- B
All ZIP Codes in McHenry County
20 ZIP codes tracked in McHenry County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 60033 | Harvard | 83 | B | 0 | $199K |
| 2 | 60152 | Marengo | 83 | B | 2 (1 health) | $259K |
| 3 | 60102 | Algonquin | 82 | B | 15 | $321K |
| 4 | 60156 | Lake In The Hills | 82 | B | 19 (1 health) | $296K |
| 5 | 60021 | Fox River Grove | 76 | B | 22 | $286K |
| 6 | 60013 | Cary | 75 | B | 36 | $291K |
| 7 | 60042 | Island Lake | 73 | B | 27 | $244K |
| 8 | 60142 | Huntley | 73 | B | 25 (2 health) | $324K |
| 9 | 60097 | Wonder Lake | 71 | B | 34 (2 health) | $216K |
| 10 | 60014 | Crystal Lake | 67 | C | 76 (1 health) | $296K |
| 11 | 60051 | Mchenry | 67 | C | 118 (1 health) | $268K |
| 12 | 60098 | Woodstock | 67 | C | 73 (3 health) | $258K |
| 13 | 60050 | Mchenry | 53 | D | 124 (1 health) | $245K |
| 14 | 60001 | Alden | — | — | — | |
| 15 | 60012 | Crystal Lake | — | — | 47 (1 health) | $397K |
| 16 | 60034 | Hebron | — | — | 2 | $254K |
| 17 | 60039 | Crystal Lake | — | — | — | |
| 18 | 60071 | Richmond | — | — | 2 | $290K |
| 19 | 60072 | Ringwood | — | — | 90 (1 health) | $390K |
| 20 | 60180 | Union | — | — | 7 (2 health) | $290K |
Recommended Buyer Guides for McHenry County
Retailer arrangements don't shape what appears here - the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Water Filters for PFAS — PFAS detected in 9 ZIP codes
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 McHenry County, Illinois
Overview
McHenry County in Illinois covers 20 tracked ZIP records with an average Home Safety Score of B (73/100) across 13 scored records.
17 of 18 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 4 health-based violations appear in the available health breakdown.
← Back to Illinois Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.