California UST Compliance Deadline:
What You Need to Know Before December 31, 2025
California’s UST compliance deadline is just months away, here’s what you need to know to avoid costly fines and closures.
If you operate an underground storage tank (UST) in California, the clock is ticking. Senate Bill 445 requires all non-compliant single-walled USTs to be permanently closed or replaced by December 31, 2025. Fail to meet the deadline, and you could face daily fines, operational shutdowns, and loss of insurance coverage starting January 1, 2026.
Why Acting Early Matters
Contractors, suppliers, and inspection agencies will be in high demand as the deadline approaches. Waiting too long could mean installation delays, higher costs, and the risk of missing the compliance date. In addition, some insurance providers may stop covering tanks that are nearing or past their manufacturer’s recommended lifespan. Acting now ensures you secure a contractor, manage costs, and keep your facility operational.
Three ways to meet the 2025 deadline
Permanently close the tank
Requires prior authorization from the governing board.
Remove the tank entirely
Eliminates compliance concerns and frees up space.
Remove and replace the tank
The most common long-term solution for continued operations.
How We Can Help
With over 40 years of experience in fueling system construction and compliance, R & R DiMaggio Construction handles projects from start to finish. Whether it’s permitting, removal, installation, or testing, our team understands California’s UST regulations and works to ensure your site meets all requirements ahead of schedule.
Don’t Wait; Contact Us Today
Schedule your free compliance consultation today.