Environment
Flagstone Elementary School — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Flagstone Elementary School in CASTLE ROCK, Colorado.
Latest Air Quality Index
25
Good · monitor 30.3 km away
PM2.5 annual4.5 µg/m³
Water health violations 10yr0
TRI sites within 1 mi0
Air Quality
EPA AirNow + AQS · 2024
25
AQI latest — Good
25
AQI 7-day avg
3
Days unhealthy in last 90
4.5
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
50.7
Ozone annual ppb
Public Water System
CASTLE ROCK TOWN OF · PWS CO0118010
0
Health-based violations (10yr)
0
Acute violations (10yr)
106,822
Population served
36
Most recent violation type
2025-06-01
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
0
TRI sites within 1 mile
5
TRI sites within 5 miles
19.6 mi
Nearest Superfund (NPL)
LOWRY LANDFILL
1.1 mi
Nearest brownfield
DENVER URBAN GARDEN AT LONE TREE ELEMENTARY SCHOOL
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).