A Guide to DEEP’s Environmental Quality Records Center (File Room) 

Starting June 1st, public access to DEEP’s records center at 79 Elm Street, Hartford will be available to a maximum capacity of 12. We strongly recommend you schedule an appointment online ahead of time to confirm your spot on any given day. 

Documents and Data Available Online

Documents in Online Search Document Portal

Use the DEEP Document Online Search Portal to search, view, and download electronically available documents. Currently available agency documents, include:  Hazardous Waste Manifests, Spill Reports and associated documents, and a growing number of Remediation documents.

Video - Online Search Portal Demonstration (Recorded October 2019 - Remediation Roundtable Meeting)



Many datasets concerning the environment and natural resources category can be found within the CT Open Data platform, which include the datasets listed below. These datasets can be searched, sorted, tabulated, and downloaded.  The datasets only provide data from DEEP databases.  They do not provide access to electronic documents like the DEEP Document Online Search Portal.  However, the datasets can be very useful search tools, for example if you are simply looking to find a case number or are searching for a specific address before you search the DEEP Document Online Search Portal.

Datasets on CT Open Data:


Spills Incidents Reported to CT DEEP from January 1, 1996 - June 30, 2022

Spills Incidents Reported to CT DEEP from July 1, 2022 to Recent

Note: Documents related to releases (spills) reported to CT DEEP from 1970 to the present are available on the DEEP Document Online Search Portal. Additionally, documents consisting of completed Emergency Incident Field Reports for releases reported to CT DEEP from July 1, 2022 to the present are available through the Releases Reported to DEEP Portal.


Hazardous Waste Manifest Portal Metadata (all years of manifests, 1981 – 2018)

Note: This dataset contains only the data from the Portal that is associated with the scanned manifest documents (i.e. Town, Address, Company Name, etc.).  Scanning of all years of manifest documents is complete, and the images are available via the DEEP Document Online Search Portal.  Searching the Open Data Metadata dataset is faster and more powerful compared to the Portal. The Metadata dataset includes a description of the dataset and the manifest documents.

Hazardous Waste Manifests 1984-2008 (older, incomplete Manifest dataset)

Note: This dataset is available in case the public wants to compare search results between the newer, complete Portal Metadata and the older, 1984 – 2008 dataset.  There are small differences between the two datasets that may result in different search results.


Registered Underground Storage Tanks (UST)


Leaking Underground Storage Tanks  (LUST) 

Note: Some documents are available via the DEEP Online Search Portal.


Toxics Release Inventory (TRI) Facility List by Year


Environmental Monitoring Results for Radioactivity: Air Samples  


Records Center

Hours of Operation
How to Schedule an Appointment
Files Located in the Records Center
File Review Procedures
Records Center Self-Service Documents
Copier Procedures
Certified Copies
Other Sources of Information
USGS Maps and Aerial Photos

Hours of operation: Tuesday, Wednesday and Thursday - 9:00 a.m. to 11:30 a.m. and 1:00 p.m. to 2:30 p.m. Public access closes for the day at 4:00 pm.


To schedule an appointment: The DEEP Records center is now accepting appointments online. This will guarantee your place in line. Upon booking your appointment, you will be required to submit a File Request Form to DEEP.RecordsCenter@ct.gov at least 24 hours prior to your appointment so that records center staff can prepare your files ahead of time or even provide them electronically as much as possible. Requests will be fulfilled in the order in which they are received.

File Review Procedures

  1. A file review area with tables, chairs, and copy machines has been established outside the DEEP File Room Vault for the convenience of the public.
  2. A "Request for File Review" Form must be completed to obtain any files.
  3. All files shall be reviewed in the file review area and shall not be removed by the public for any reason.
  4. Members of the public may not enter the File Room Vault Area unless accompanied by a DEEP staff person.
  5. Files will not be pulled between 11:30 a.m. and 1:00 p.m., or after 2:30 p.m.
  6. Personal items (with the exception of notepaper or a lap top computer) are not allowed on the review tables.
  7. No food or drink is allowed at the file review tables.
  8. Please handle all files with care and return the files in the same condition and order that you received them. Keep all files in a neat and orderly manner.
  9. Pencils are the preferred writing instrument at the file review tables to avoid damage to the files.
  10. The use of privately owned copiers within the file review area is prohibited.
  11. Please see the records center attendant for staplers, staple pullers, and questions regarding the files.
  12. If you find something misfiled, please notify one of the DEEP records center staff.
  13. There is no smoking allowed anywhere in the building.
  14. DEEP is not responsible for personal items lost, stolen or damaged.
  15. Sec. 53-153 of the Connecticut General Statutes (CGS) - Unlawful removal or alteration of records. Counterfeiting seals.

Copier Procedures

There are two card-operated copiers which are capable of providing double-sided copies and have an autofeed function. Currently fees are being waived for the use of these copiers or any handheld battery operated devices used for scanning (including cell phones).

Certified Copies

If needed, you may obtain certified copies of documents. The charge for certified copies is $1.00 for the first page, and $.50 for each additional page. The records center attendant must make the copies and certify them for you.

U.S.G.S. Maps and Aerial Photos

U.S.G.S. maps, and other publications may be purchased at the DEEP Store

Aerial Photos are no longer available at the DEEP.  They can be reviewed at the Connecticut State Library.

Files Located in the Records Center

PLEASE NOTE: The presence or absence of Information in the Department’s files is not a guarantee of the presence or absence of environmental problems or violations at a site or facility.

Dates after file types indicate earliest files stored in file room. Some units of the DEEP have older files (generally pre-1990) stored off-site. Access to these documents may be arranged by contacting the appropriate Bureau representative in the file room.

Air Management Bureau

Indirect Source Permits 1976
Permit Files 1973
PIQs (Pre-Inspection Questionnaires)  1995
Program Files (Orders, NOVs, Inspection Reports, Complaints) 1996
Stack Testing 1996
Stage II Gas Station Inspections 1993
Open Burning Permits 2001

Bureau of Materials Management and Compliance Assurance

Oil & Chemical Spill Incident

Reports/Correspondence 1972
RCRA Facilities

Permits  1985

Notices of Violation 1979

Orders 1979

Complaints 1979

Correspondence 1980

Groundwater Monitoring 1981
Solid Waste Facilities

Engineering Drawings & Maps 1975

Landfills & Volume Reduction Plants 1960

Water Quality Data  1970

Special Waste Authorizations  1985
Underground Storage Tank (UST) Program

Inspection Reports 1986

Notification Forms  1986

Variance Requests 1986

Bureau of Water Protection and Land Reuse

Discharge Permits, Monitoring, Correspondence, Reports, and Orders for the Following Programs

Groundwater 1980

Industrial Discharges 1990

Subsurface Disposal 1980
Remediation Division

Significant Environmental Hazard Records

Superfund (State & Federal) 1985

Property Transfers 1986

Urban Site Remediation 1992

Well Completion Reports

NOTE: If documents that you request have a "Confidential" designation or claim, staff in the File Room will assist you further.

File Room Self-Service Documents

Several series of documents are available in the File Review Area and can be accessed without assistance from DEEP Records Center staff:

Air Management Bureau

Active Non-Title V applications list 
Consumer Protection/DEP Stage II Listings for Gas Stations 
PIQ Listings 
Point Source Emissions Inventory - 2004

Water Protection and Land Reuse Bureau (Maps)

Coastal Boundary Maps 
State & Federally Listed Species & Natural Communities Maps
Property Transfer List 
Superfund Sites 
Comprehensive Environmental Response Compensation Liability Act (CERCLA)
List of Contaminated or Potentially Contaminated Sites 
UST Petroleum Cleanup Meeting (letters to Commissioner) UST Program
Minutes of Review Board Meetings

Materials Management and Compliance Assurance Bureau

Discharge Permit Expiration Tables 
Underground Storage Tank Registration List (UST Program)
Leaking Underground Storage Tank List (UST Program)
Hazardous Waste Notifiers List (WEED)
Residential Underground Storage Tank (UST Program)
Guidelines for the Management of Wastewater Treatment Sludge at Solid Waste Disposal Facilities
Solid Waste Management Plan
Hazardous Waste Sites 
List of Contaminated or Potentially Contaminated Sites

Other Sources of Information

Bureau of Water Protection and Land Reuse, 2nd Floor

Municipal/WPCA  860-424-3704
Remediation /Property Transfer, State & Federal Superfund (2nd Floor) 860-424-3705
Leaking Underground Storage Tank Trust Program/1988 860-424-3368
Dam Safety 860-424-3704

Bureau of Water Protection and Land Reuse, Land and Water Resources, 3rd Floor

Coastal Permits, Certificates of Permission 860-424-3034
Inland Wetlands, Flood & Erosion Control 860-424-3706

State Emergency Response Commission, 4th Floor   860-424-3373  DEEP.CTEPCRA@ct.go

Emergency Planning and Community Right-to-Know  Act
Section 311/MSDS: Chemical Hazards Reporting
Section 312/Tier II: Chemical Inventory Reports
Section 313/Form R: Toxic Release Reporting

Bureau of Materials Management and Compliance Assurance, 4th Floor  860-424-3023

List of Commercial Hazardous Waste and Connecticut Regulated Facilities
Hazardous Waste Management System
Identification and Listing of Hazardous Waste
Permitting Enforcement 860-424-3705
Polychlorinated Biphenyl’s (PCB’s)
Hazardous Waste Manifests 860-424-3375
Solid Waste Management Regulations

Air Management Bureau, 5th Floor

Active State Orders (Including Trading Orders) 860-424-4152
Active Violations 860-424-3028
Air Source Registration 860-424-4152
Compliance Analysis Coordination Unit/CACU 860-424-4152
Monitoring Meteorological Data 860-424-4152
Permit Applications under Review 860-424-4152
Land Acquisition Div, 6th Floor
Land Records, DEEP Holdings, Maps, Historic Interest


Content Last Updated October 2022