Air
- United States Environmental Protection Agency (EPA)
- California Environmental Protection Agency (Cal/EPA)
- California Air Resources Board (CARB)
- Local Air Districts, e.g.:
- South Coast AQMD
- Bay Area AQMD
- San Joaquin Valley APCD
- Mojave Desert AQMD
- Ventura County APCD
- Antelope Valley AQMD
- San Diego APCD
- Santa Barbara County APCD
- Kern County APCD
- 15+ other CA Air Districts
Safety
- Federal OSHA
- Cal/OSHA
- California Department of Public Health
- NIOSH
- County Health Departments
- City Health Department
Water
- State Water Resources Control Board (SWRCB)
- County Sanitation Districts, e.g.:
- Orange County
- Los Angeles County
- 20+ other CA Sanitation Districts
- Local Water Districts, e.g.:
- Eastern Municipal Water District
- Glendale Water & Power
- LA Department of Water and Power
- City Sanitation Services
- 20+ other CA Water Services
Waste
- Local Certified Unified Program Agencies (CUPA)
- Department of Toxic Substances Control (DTSC)
- California Integrated Waste Management Board
- Office of Environmental Health Hazard Assessment