Connecticut Underground Storage Tank Registry with Facility and Tank Details

Approximately 45,000 commercial underground storage tanks previously and currently registered in Connecticut, with about 8,000 still in use. The list is based on notification information submitted since November 1985 and is updated weekly by the Connecticut Department of Energy and Environmental Protection (CT DEEP). It contains information on both active and non-active tanks, including federally and state-regulated USTs.

Use Cases

• Map tank locations and site density using Tank Latitude, Tank Longitude, UST Site Latitude, and UST Site Longitude.
• Analyze tank status and closure trends using Status of Tank, Closure Type, Last Used Date, and Installation Date.
• Assess compliance and safety features using columns like Spill Protection, Overfill Protection, and Construction Type - Tank.
• Group and analyze facilities by substance and capacity using Substance Currently Stored, Estimated Total Capacity (gallons), and Site Name.

Strengths

• Contains data on approximately 45,000 tanks with weekly updates.
• Includes detailed geospatial coordinates for both tanks and sites.
• Provides over 25 columns covering technical, regulatory, and location details.

Limitations

• The description notes errors may exist due to incorrect form submissions, data entry errors, duplicates, and missing data.
• Row count and file size are unknown, which may limit suitability assessment.
• License and author information are not provided in the input.

Provenance

Source

Connecticut Department of Energy and Environmental Protection (CT DEEP), via data.ct.gov.

Collection Method

Notification forms submitted by tank owners/operators via EZFile since 1985.

Time Range

Records from November 1985 onward.

Freshness

Updated weekly; last updated 2026-03-31 16:00:34.

Geography

State of Connecticut, United States.