Progress in Closing Leaking Underground Storage Tank Sites Over 20 Years

Contamination from leaking underground storage tank (UST) sites poses a threat to groundwater, which is a crucial source of drinking water for many Americans. The EPA, along with various partners, has significantly reduced the backlog of such sites from around 168,400 in 1999 to 64,800 in 2019. Progress in closing these sites is evident across states, with many achieving closure percentages above 90%. The efforts reflect a collective commitment to addressing environmental challenges and safeguarding water resources.

• Progress
• EPA
• Underground Storage Tanks
• Water Contamination
• Environmental Protection

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1. 20 Years Of Progress 20 Years Of Progress Closing LUST Sites Closing LUST Sites % Of LUST Sites Closed (Cumulative) By State U.S. Environmental Protection Agency Office of Underground Storage Tanks www.epa.gov/ust March 2020

2. The Problem Contamination from leaking underground storage tank (UST) sites threatens groundwater, the source of drinking water for nearly half of all Americans. Addressing the backlog of leaking UST sites remaining to be cleaned up continues to be a high priority for EPA and our state, territorial, and tribal partners. Good News EPA and our partners reduced the backlog of leaking UST sites from approximately 168,400 in 1999 to 64,800 in 2019*. The maps on the following slides show progress each state and territory made closing leaking UST sites over the past 20 years. The maps display the percentage of sites closed in 5-year intervals. As of 2019, 34 states have closed over 90 percent of their leaking UST sites. *U.S. EPA s UST Performance Measures Reports; www.epa.gov/ust/ust-performance-measures EPA Office of Underground Storage Tanks, March 2020

3. 1999 % Backlog Reduction 79% 80-89% 90-100% EPA Office of Underground Storage Tanks, March 2020

4. 2004 % Backlog Reduction 79% 80-89% 90-100% EPA Office of Underground Storage Tanks, March 2020

5. 2009 % Backlog Reduction 79% 80-89% 90-100% EPA Office of Underground Storage Tanks, March 2020

6. 2014 % Backlog Reduction 79% 80-89% 90-100% EPA Office of Underground Storage Tanks, March 2020

7. 2019 % Backlog Reduction 79% 80-89% 90-100% EPA Office of Underground Storage Tanks, March 2020

8. 20 Years Of Progress % Backlog Reduction 79% 80-89% 90-100% 1999 2019 EPA Office of Underground Storage Tanks, March 2020