A proposal by the U.S. Forest Service to use glyphosate-based herbicides as part of post-fire restoration efforts in the Lake Tahoe Basin is facing intensifying scrutiny from local residents and environmental advocates. According to reports from Active NorCal and a yearlong investigation by Mother Jones, the plan involves treating areas scorched by the 2021 Caldor Fire to support the regeneration of native conifers.
The scope of the project includes potential application areas near the base and parking facilities of Sierra-at-Tahoe Ski Area, as well as forested sections close to Kirkwood and Heavenly ski resorts. Additionally, the proposal covers campgrounds, popular trailheads, and areas adjacent to residential homes in the community of Meyers. While the broader Caldor Fire restoration project spans up to 75,000 acres, the Tahoe Regional Planning Agency (TRPA) clarified that approximately 3,000 acres within the Tahoe Basin are specifically being considered for brush regrowth control using these methods.
Glyphosate, commonly known by the brand name Roundup, is utilized to eliminate shrubs and hardwood trees that compete with newly planted seedlings for sunlight and water. However, its use is highly controversial; the World Health Organization’s cancer agency has classified the chemical as a probable carcinogen. Mother Jones reported that pesticide application in California forests has surged, with 266,000 pounds of pure glyphosate applied in 2023 — nearly five times the amount used two decades ago.
The TRPA and local community members have submitted formal comments expressing concerns over water quality, sensitive species, and public safety. While TRPA regulations discourage the use of terrestrial herbicides, they do not strictly prohibit them if specific environmental standards are met. The Forest Service has stated it is working to ensure any herbicide management aligns with threshold standards to protect the basin’s sensitive ecosystem.
The Lake Tahoe Basin Management Unit maintains that the use of EPA-certified herbicides is a necessary tool for forest regeneration following high-severity burns. However, for the thousands of people who hike, camp, and forage in the region, the potential for chemical application in high-traffic recreation zones remains a point of significant contention.
