Environment
Hilltop Elem School — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Hilltop Elem School in McHenry, Illinois.
Latest Air Quality Index
42
Good · monitor 14.1 km away
PM2.5 annual7.6 µg/m³
Water health violations 10yr0
TRI sites within 1 mi0
Air Quality
EPA AirNow + AQS · 2024
42
AQI latest — Good
42
AQI 7-day avg
3
Days unhealthy in last 90
7.6
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
47.5
Ozone annual ppb
Public Water System
MCHENRY · PWS IL1110600
0
Health-based violations (10yr)
0
Acute violations (10yr)
22,335
Population served
52
Most recent violation type
2025-07-01
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
0
TRI sites within 1 mile
10
TRI sites within 5 miles
7.3 mi
Nearest Superfund (NPL)
WAUCONDA SAND GRAVEL
11.8 mi
Nearest brownfield
427 ORCHARD STREET
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).