Environment
Mountain High — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Mountain High in Lake Arrowhead, California.
Latest Air Quality Index
59
Moderate · monitor 15.3 km away
PM2.5 annual13.2 µg/m³
Water health violations 10yr0
TRI sites within 1 mi0
Air Quality
EPA AirNow + AQS · 2024
59
AQI latest — Moderate
59
AQI 7-day avg
3
Days unhealthy in last 90
13.2
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
67.6
Ozone annual ppb
28.7
NO₂ annual ppb
Public Water System
LAKE ARROWHEAD CSD · PWS CA3610005
0
Health-based violations (10yr)
0
Acute violations (10yr)
7,038
Population served
—
Most recent violation type
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
0
TRI sites within 1 mile
0
TRI sites within 5 miles
7.3 mi
Nearest Superfund (NPL)
NEWMARK GROUND WATER CONTAMINATION
10.4 mi
Nearest brownfield
TRANSIT VILLAGE CORE
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).