Environment
Mark Twain — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Mark Twain in Alton, Illinois.
Latest Air Quality Index
45
Good · monitor 1.8 km away
PM2.5 annual8.1 µg/m³
Water health violations 10yr0
TRI sites within 1 mi5
Air Quality
EPA AirNow + AQS · 2024
45
AQI latest — Good
45
AQI 7-day avg
1
Days unhealthy in last 90
8.1
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
52.7
Ozone annual ppb
21.2
NO₂ annual ppb
Public Water System
IL AMERICAN-ALTON · PWS IL1195150
0
Health-based violations (10yr)
0
Acute violations (10yr)
46,127
Population served
—
Most recent violation type
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
5
TRI sites within 1 mile
16
TRI sites within 5 miles
6.6 mi
Nearest Superfund (NPL)
CHEMETCO
1.0 mi
Nearest brownfield
VACANT RESIDENTIAL LOTS GEORGE STREET
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).