Environment
HARDIN MIDDLE — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of HARDIN MIDDLE in ST CHARLES, Missouri.
Latest Air Quality Index
34
Good · monitor 20.2 km away
PM2.5 annual6.2 µg/m³
Water health violations 10yr0
TRI sites within 1 mi3
Air Quality
EPA AirNow + AQS · 2024
34
AQI latest — Good
34
AQI 7-day avg
3
Days unhealthy in last 90
6.2
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
49.8
Ozone annual ppb
19.4
NO₂ annual ppb
Public Water System
ST CHARLES PWS · PWS MO6010707
0
Health-based violations (10yr)
0
Acute violations (10yr)
73,040
Population served
66
Most recent violation type
2024-10-01
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
3
TRI sites within 1 mile
31
TRI sites within 5 miles
3.1 mi
Nearest Superfund (NPL)
WESTLAKE LANDFILL
2.2 mi
Nearest brownfield
HARRIS ELEMENTARY SCHOOL ADMIN OFFICES FORMER
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).