Environment
Twain Harte — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Twain Harte in Twain Harte, California.
Latest Air Quality Index
31
Good · monitor 43.5 km away
Water health violations 10yr0
TRI sites within 1 mi0
Air Quality
EPA AirNow + AQS · 2024
31
AQI latest — Good
31
AQI 7-day avg
1
Days unhealthy in last 90
48.4
Ozone annual ppb
Public Water System
TWAIN HARTE COMMUNITY SERVICES DISTRICT · PWS CA5510005
0
Health-based violations (10yr)
0
Acute violations (10yr)
2,378
Population served
3D
Most recent violation type
2025-04-01
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
0
TRI sites within 1 mile
0
TRI sites within 5 miles
37.2 mi
Nearest Superfund (NPL)
ARGONAUT MINE
37.0 mi
Nearest brownfield
ORO DE AMADOR
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).