Jump to main content
An official website of the United States government.
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Air
Bed Bugs
Chemicals and Toxics
Environmental Information by Location
Greener Living
Health
Land, Waste, and Cleanup
Lead
Mold
Pesticides
Radon
Science
Water
A-Z Topic Index
Laws & Regulations
By Business Sector
By Topic
Compliance
Enforcement
Laws and Executive Orders
Guidance
Regulations
About EPA
EPA Administrator
Current Leadership
Organization Chart
Staff Directory
Planning, Budget and Results
Jobs and Internships
Headquarters Offices
Regional Offices
Labs and Research Centers
Contact Us
Share
Sole Source Aquifers for Drinking Water
Overview
What is a sole source aquifer (SSA)?
What is the SSA program?
EPA’s authority to designate SSAs
SSA contacts by EPA Region
Petition for SSA
Designation
Guidance on petitioning for SSA designation
SSA Project Review
Project review coordination and MOU's
Project review steps
Projects excluded from review
Opportunities for public awareness and participation
Limitations of the SSA program
EPA Region 4 is piloting a Sole Source Aquifer (SSA) project review form
SSA Locations
Interactive map of SSAs
Geospatial data set
