St. Clair County, Illinois
32 ZIP codes · Avg score 76/100 · Grade B · Updated
ZipCheckup grade for St. Clair County: B.
This ZIP looks solid, with a few items worth a quick check.
St. Clair County's tap water quality puts it in the upper tier nationally; the 32 ZIP codes here record few health-based violations.
How St. Clair County Compares
How St. Clair County Compares
St. Clair County scores 8 points above the Illinois state average (68/100) and 3 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: St. Clair County, Illinois
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.7 (asthma 11.1%, diabetes 13.1%)
Estimated additional annual cost per homeowner: $1,716, driven primarily by flood
64.7% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across St. Clair County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 23 violations. Past 5 years: 27 total (27 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: $1,716
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
113,456 housing units in St. Clair 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 St. Clair County
Remediation costs are relatively manageable for most homeowners in St. Clair 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 St. Clair County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving St. Clair County
8 community water systems serving St. Clair County.
- B
- B
- C
- B
- C
- C
21 total water systems serve St. Clair County.
Systems with the most violations in St. Clair County
5 water systems with recorded EPA violations.
- C
- B
- B
- C
- B
All ZIP Codes in St. Clair County
32 ZIP codes tracked in St. Clair County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 62059 | Lovejoy | 83 | B | 0 | $37K |
| 2 | 62205 | East Saint Louis | 83 | B | 0 | $46K |
| 3 | 62206 | East Saint Louis | 83 | B | 0 | $58K |
| 4 | 62207 | East Saint Louis | 83 | B | 0 | $54K |
| 5 | 62220 | Belleville | 83 | B | 1 | $141K |
| 6 | 62221 | Belleville | 83 | B | 2 | $207K |
| 7 | 62223 | Belleville | 83 | B | 3 | $150K |
| 8 | 62225 | Scott Air Force Base | 83 | B | 2 | — |
| 9 | 62226 | Belleville | 83 | B | 2 | $163K |
| 10 | 62254 | Lebanon | 83 | B | 5 | $197K |
| 11 | 62269 | O Fallon | 83 | B | 5 | $274K |
| 12 | 62001 | Alhambra | 80 | B | 8 (5 health) | $209K |
| 13 | 62255 | Lenzburg | 79 | B | 10 | $153K |
| 14 | 62257 | Marissa | 79 | B | 11 | $119K |
| 15 | 62285 | Smithton | 79 | B | 9 | $265K |
| 16 | 62264 | New Athens | 78 | B | 14 | $137K |
| 17 | 62201 | East Saint Louis | 68 | C | 14 (1 health) | $56K |
| 18 | 62203 | East Saint Louis | 68 | C | 16 (1 health) | $73K |
| 19 | 62204 | East Saint Louis | 68 | C | 14 (1 health) | $48K |
| 20 | 62208 | Fairview Heights | 68 | C | 16 (1 health) | $168K |
| 21 | 62232 | Caseyville | 68 | C | 16 (1 health) | $115K |
| 22 | 62260 | Millstadt | 66 | C | 2 | $230K |
| 23 | 62239 | Dupo | 65 | C | 3 | $112K |
| 24 | 62240 | East Carondelet | 65 | C | 3 | $85K |
| 25 | 62243 | Freeburg | 63 | C | 8 | $268K |
| 26 | 62258 | Mascoutah | 60 | C | 17 | $230K |
| 27 | 62071 | National Stock Yards | — | — | — | |
| 28 | 62202 | East Saint Louis | — | — | — | |
| 29 | 62222 | Belleville | — | — | — | |
| 30 | 62224 | Mascoutah | — | — | — | |
| 31 | 62282 | Saint Libory | — | — | $169K | |
| 32 | 62289 | Summerfield | — | — | $74K |
Recommended Buyer Guides for St. Clair County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Lead Paint Test Kits — 64.7% of homes built before 1978
- 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 St. Clair County, Illinois
Overview
St. Clair County in Illinois covers 32 tracked ZIP records with an average Home Safety Score of B (76/100) across 26 scored records.
22 of 26 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 6 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.