Water: Underground Injection Control
Underground Injection Control Program
Underground Injection Control Quick Finder
| Class V Wells | Geologic Sequestration of CO2 |
Reporting Forms (7520s) |
| Class V Injection Wells Study | Hydraulic Fracturing | UIC Primacy |
The UIC Program is responsible for regulating the construction, operation, permitting, and closure of injection wells that place fluids underground for storage or disposal. This site provides information for owners and operators of injection wells and state regulators on how to safely operate injection wells to prevent contamination of underground drinking water resources.
You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.
Compliance Assistance
- Reporting Forms
- Compliance Assistance for Class V Well Operators
- Frequently Asked Questions
- Please check back soon for compliance assistance for Class VI wells
Injection Well Types
- Industrial & Municipal Waste Disposal Wells (Class I)
- Oil and Gas Related Wells (Class II)
- Mining Wells (Class III)
- Shallow Hazardous and Radioactive Injection Wells (Class IV)
- Shallow Non-Hazardous Injection Wells (Class V)
- Geologic Sequestration Wells (Class VI)
UIC Documents
UIC Program Information
- Basic Information
- History of the UIC Program
- UIC Program Primacy
- Animation: Protective Aspects of Hazardous Waste Wells
- Class V Permitting Authorities
- UIC Programs on Tribal Lands
- Grants
- Regulations
- Where You Live
- Glossary
About Injection Wells
- What is an Injection Well?
- Injection Well Classes
- Drawing of Well Types
- Inventory of Injection Wells
- State Inventory (PDF) (2 pp, 206K)
- Tribal Inventory (PDF) (7 pp, 262K)
- Technical Overview of the UIC Program (PDF) (87 pp, 1MB)