The number of zero-emission trucks in the United States surpassed 59,000 in June 2025, according to CALSTART’s biannual Zeroing in on Zero-Emission Trucks (ZETs) report, which examines the number of zero-emission medium- and heavy-duty commercial vehicles, purchased or leased vehicles nationwide.
During the first six months of 2025, approximately 6,526 ZETs were added, a 49.2 percent decline from the first six months of 2024. This is the equivalent of approximately 1.32 percent of new truck deployments.
“This update shows that ZETs are no longer a future concept — they are here, scaling and delivering results where states have taken decisive action,” Tor Larson, CALSTART Trucks and Off-Road vice president, said. “The progress we’re seeing is driven by clear policy signals; smart incentives; and close coordination between fleets, manufacturers, utilities, and governments. To sustain and accelerate this momentum nationwide, we must continue investing in vehicle and infrastructure solutions that lower upfront costs and give fleets the confidence to transition. With strong leadership and collaboration, ZETs can become the default choice across every major market segment.”
The top states for deployments were California, Texas and Florida.
CALSTART is an industry organization focused on transportation decarbonization and clean air. It has offices in California, Colorado, Florida, Michigan, New York and Europe.