Environment
DUNCAN HS — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of DUNCAN HS in Duncan, Oklahoma.
Latest Air Quality Index
37
Good · monitor 43.9 km away
Water health violations 10yr187
TRI sites within 1 mi0
Air Quality
EPA AirNow + AQS · 2024
37
AQI latest — Good
37
AQI 7-day avg
3
Days unhealthy in last 90
Public Water System
DUNCAN PUBLIC UTILITIES AUTHORITY · PWS OK1010809
187
Health-based violations (10yr)
4
Acute violations (10yr)
23,000
Population served
27
Most recent violation type
2025-11-01
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
0
TRI sites within 1 mile
8
TRI sites within 5 miles
29.5 mi
Nearest Superfund (NPL)
OKLAHOMA REFINING CO
0.9 mi
Nearest brownfield
FORMER BEN HILL TIRE
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).