Resources for Identifying Sources of Groundwater Contamination in Colorado

Groundwater Vulnerability Atlas – Developed by the CDPHE Tracking Program to assist users in finding groundwater information throughout Colorado.

Leaking Underground Storage Tanks (LUSTs): Oil and Public Safety (OPS) COSTIS database (Storage Tank Database). Search for events by city, county, or zip code on the OPS website. 

• https://ops.colorado.gov/Petroleum/maps

Superfund Sites: The CDPHE Hazardous Materials and Waste Management Division (HMWMD) maintains a list of active Superfund sites on its website. The division may require data even if your site is greater than one-mile from a Superfund site, based on the nature and extent of contamination at these sites.

• https://www.colorado.gov/pacific/cdphe/superfund-sites

• https://www.colorado.gov/pacific/cdphe/hm-gis-data

National Priorities List (NPL) sites: The U.S. Environmental Protection Agency maintains a list of national priorities sites on their website. 

• https://www.epa.gov/superfund/national-priorities-list-npl-sites-state#…

Voluntary Cleanup Sites (VCUPs): The CDPHE HMWMD maintains a list of VCUPs by County. Visit the HMWMD website, and select the “Voluntary Cleanup Sites Grouped by County” list at the top of the page.

• https://www.colorado.gov/pacific/cdphe/voluntary-cleanup

• https://www.colorado.gov/pacific/cdphe/hm-gis-data

Environmental Covenants: Environmental Covenant Sites are listed on the CDPHE HMWMD website. The county the site is located in and a map of the contaminated area are provided on this webpage.

• https://www.colorado.gov/pacific/cdphe/hmcovenants

• https://www.colorado.gov/pacific/cdphe/hm-gis-data

RCRA Corrective Action Sites:  The U.S. Environmental Protection Agency maintains a list of RCRA Hazardous Waste Corrective Action sites in Colorado that are undergoing or potentially undergoing groundwater remediation.  

• https://www.epa.gov/cleanups/cleanups-my-community

• https://www3.epa.gov/myem/envmap/find.html

• Visit the CDPHE’s Hazardous Waste Corrective Action Unit Contacts for more information on a corrective action site. 

Brownfield Sites: The CDPHE HMWMD maintains a list of active Brownfield sites on its website.

• https://www.colorado.gov/pacific/cdphe/brownfields

• https://www.colorado.gov/pacific/cdphe/hm-gis-data

Per- and Polyfluoroalkyl Substances (PFAS) Contamination: 

• Water Quality Control Commission Regulation 42 (All groundwater within Specified Area 7)

• PFAS Mapping (Concentration Map)

Phosphorus Control Areas

• Water Quality Control Commission Regulation 72 (Cherry Creek Reservoir watershed)

• Water Quality Control Commission Regulation 73 (Chatfield Reservoir watershed)