Atmospheric Deposition

Atmospheric Deposition comprises only about 15% of the FSP loading, but the bulk of the total nitrogen loading to the Lake. The strategy for reducing FSP and phosphorus from atmospheric deposition calls for actions and controls that reduce dust from roadways,  parking lots, and construction sites, such as street  sweeping with advanced equipment, or paving or eliminating dirt roads. The strategy for reducing nitrogen generated in-basin as emissions relies on the Tahoe Regional Planning Agency’s (TRPA) 2012 air quality and transportation management plan, which aims to reduce vehicle miles travelled in the Tahoe Basin.


While the TMDL Management Agencies have not formally designated PMs for Atmospheric Depostition, four Environmental Improvement Project (EIP) PMs are tracked and reported that are closley aligned with the goal of achieving load reductions in the Atmospheric Deposition Source Category. Basinwide accomplishments for the 2015 and 2016 reporting cycle include:


  • Miles of Street Sweeping - swept over 9,500 total miles of streets using high performance sweepers
  • Miles of Pedestrian & Bike Routes Improved or Constructed - constructed 10.5 total miles of pedestrian and bicycle routes
  • Non-compliant Wood Stoves Removed or Retrofitted - removed/retrofitted a total of 115 non-compliant wood stoves
  • Pounds of Air Pollutants Removed or Avoided by Project - no results were reported