Environment
Centennial Elementary — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Centennial Elementary in Graham, Washington.
Latest Air Quality Index
29
Good · monitor 18.3 km away
PM2.5 annual5.1 µg/m³
Water health violations 10yr0
TRI sites within 1 mi0
Air Quality
EPA AirNow + AQS · 2024
29
AQI latest — Good
29
AQI 7-day avg
3
Days unhealthy in last 90
5.1
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
23.8
NO₂ annual ppb
Public Water System
GRAHAM HILL MUTUAL WATER CO INC · PWS WA5328650
0
Health-based violations (10yr)
0
Acute violations (10yr)
1,474
Population served
71
Most recent violation type
2023-07-01
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
0
TRI sites within 1 mile
7
TRI sites within 5 miles
5.2 mi
Nearest Superfund (NPL)
HIDDEN VALLEY LANDFILL THUN FIELD
11.5 mi
Nearest brownfield
HERITAGE BANK
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).