Contaminant Candidate List 1

CCL 1 is a list of contaminants that are currently not subject to any proposed or promulgated national primary drinking water regulations, that are known or anticipated to occur in public water systems, and which may require regulation under the Safe Drinking Water Act (SDWA). The list includes, among others, pesticides, disinfection byproducts, chemicals used in commerce, waterborne pathogens, pharmaceuticals, and biological toxins. The Agency considered the best available data and information on health effects and occurrence to evaluate thousands of unregulated contaminants.

Data and Resources

This dataset has no data

Field Value
accessLevel public
accrualPeriodicity irregular
bureauCode {020:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://edg.epa.gov/data/public/OW/metadata/OW.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier {C74548B9-0661-4B3D-8980-BF0E9C72C81F}
issued 2014-01-01
license https://edg.epa.gov/EPA_Data_License.html
modified 1998-03-02
old-spatial -180.0,18.0,-66.0,72.0
programCode {020:072}
publisher U.S. EPA Office of Water (OW) - Office of Ground Water and Drinking Water (OGWDW)
references {https://edg.epa.gov/metadata/rest/document?id=%7BC74548B9-0661-4B3D-8980-BF0E9C72C81F%7D,https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7BC74548B9-0661-4B3D-8980-BF0E9C72C81F%7D}
resource-type Dataset
source_datajson_identifier true
source_hash d321686aa06f8cbcbe5ab7be80ff631531b5d170838eec6264caaa402d8214a6
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-180.0, 18.0], [-180.0, 72.0], [-66.0, 72.0], [-66.0, 18.0], [-180.0, 18.0]]]}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • ccl
  • contaminants
  • drinking-water
  • environment
  • health
  • human-health
  • mcl
  • pollution
  • public-water-systems
  • sdwa
  • united-states
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer Safe Drinking Water Hotline
maintainer_email safewater@epa.gov
metadata_created 2025-09-23T15:37:59.516599
metadata_modified 2025-09-23T15:37:59.516605
notes CCL 1 is a list of contaminants that are currently not subject to any proposed or promulgated national primary drinking water regulations, that are known or anticipated to occur in public water systems, and which may require regulation under the Safe Drinking Water Act (SDWA). The list includes, among others, pesticides, disinfection byproducts, chemicals used in commerce, waterborne pathogens, pharmaceuticals, and biological toxins. The Agency considered the best available data and information on health effects and occurrence to evaluate thousands of unregulated contaminants.
num_resources 0
num_tags 19
title Contaminant Candidate List 1