Air Quality, Water Quality and Solid/Hazardous Waste Regulations
Colorado Division of Water Resources
https://dwr.colorado.gov/

Lead Based Paint
https://www.colorado.gov/pacific/cdphe/categories/services-and-information/environment/air-quality/lead-based-paint

Radon Gas Consultation
https://www.colorado.gov/pacific/cdphe/categories/services-and-information/environment/radon

On-Site Wastewater Treatment System (OWTS) (“Septic”) 
Septic System Permit and Inspection (Regulations & Application) 

West Nile