Environment
Discovery Elementary — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Discovery Elementary in San Marcos, California.
Latest Air Quality Index
43
Good · monitor 18.8 km away
PM2.5 annual7.8 µg/m³
Water health violations 10yr0
TRI sites within 1 mi2
Air Quality
EPA AirNow + AQS · 2024
43
AQI latest — Good
43
AQI 7-day avg
1
Days unhealthy in last 90
7.8
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
47.2
Ozone annual ppb
21.9
NO₂ annual ppb
Public Water System
VALLECITOS WD · PWS CA3710002
0
Health-based violations (10yr)
0
Acute violations (10yr)
113,500
Population served
4H
Most recent violation type
2025-07-02
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
2
TRI sites within 1 mile
40
TRI sites within 5 miles
15.1 mi
Nearest Superfund (NPL)
CAMP PENDLETON MARINE CORPS BASE
1.8 mi
Nearest brownfield
256 W MISSION ROAD CITY OF SAN MARCOS CA
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).