Lake Tahoe Sees Record Watercraft Inspections to Block Invasive Golden Mussels

Quick action by Lake Tahoe boaters and paddlers has helped keep the destructive golden mussel and other aquatic invasive species from entering the lake, according to agencies leading the region’s Aquatic Invasive Species (AIS) program.

The Tahoe Regional Planning Agency (TRPA) and Tahoe Resource Conservation District reported inspectors performed more than 4,700 decontaminations in 2025, a 60% increase over last year. Officials say the dramatic jump reflects heightened efforts to confront the growing threat of golden mussels in Northern California.

“Our inspectors were on the front lines of defense against golden mussels,” said TRPA AIS coordinator Thomas Boos. “We’re grateful to our inspectors, boaters, and partners for keeping Lake Tahoe protected as we face this new threat.”

This year alone, inspectors intercepted 72 watercraft carrying aquatic invasive species, 14 of which had invasive mussels onboard. Since the program began in 2008, more than 123,000 watercraft have been inspected.

Officials say the golden mussel has been detected as far south as Silverwood Lake near San Bernardino, underscoring the need for vigilance across California’s waterways.

Education efforts are also ramping up. The free Tahoe Keepers training program saw one of its biggest years for new certifications, and a fourth roving inspector helped reach thousands of beachgoers with the “Clean, Drain, Dry” message.

“When people understand the risks, they spread the word and amplify our work,” said roving inspector Leland Li.

Boaters are reminded to always clean, drain, and dry their equipment to protect the Tahoe Basin’s pristine waters for future generations.