Nutrient and sediment loads into Lake Tahoe come from surface runoff such as stormwater outlets and tributary streams. Reducing nutrient and sediment loads are of utmost importance in improving Lake Tahoe's clarity. Therefore, load reductions are a priority of the Environmental Improvement Program's many programs. Regional programs ranging from street sweeping and stormwater improvements to restoring wetlands aim to reduce nutrient and sediment loads into Lake Tahoe. The Lake Tahoe Total Maximum Daily Load (TMDL) Program is a science-based plan with stormwater load reduction targets for implementers to reinstate historic clarity levels in Lake Tahoe. The Lake Tahoe TMDL Program is now in the implementation and tracking phase, with controls being implemented to reduce pollutant loading to Lake Tahoe.