Wetlands are an important part of the Reno/Tahoe area. They act as a natural filter for the solids that come out of the water treatment plant. Plant roots absorb nutrients from the water and naturally filter it. Wetlands are home for over 75% of the species in the Great Basin. However, the area's wetlands are at risk of being destroyed due to development around the city. While developers build on top of the wetlands they fill them with dirt destroying the habitat they create for the plants and animals. Washoe county has devised a plan that will help protect these ecosystems: Mitigation. In the future, when developers try to build over a wetland, they will be responsible for creating another wetland near Washoe Lake.
The Truckee River serves as Reno's primary source of drinking water. It supplies Reno with 80 million U.S. gallons (300 Ml) of water a day during the summer, and 40 million U.S. gallons (150 Ml) of water per day in the winter. Before the water goes to the homes around the Reno area, it must go to one of two water treatment plants, Chalk Bluff or Glendale Water Treatment Plant. As an attempt to save water, golf courses in Reno, like Arrow Creek Golf Course, have been using treated effluent water instead of treated water from one of Reno's water plants.
The Reno-Sparks wastewater treatment plant discharges tertiary treated effluent to the Truckee River. In the 1990s this capacity was increased from 20 to 30 million U.S. gallons (70 to 110 million liters) per day. While treated, the effluent contains suspended solids, nitrogen, and phosphorus, aggravating water quality concerns of the river and its receiving waters of Pyramid Lake. Local agencies working with the U.S. Environmental Protection Agency have developed a number of watershed management strategies to accommodate this expanded effluent discharge; to accomplish this successful outcome, the DSSAM Model was developed and calibrated for the Truckee River in order to analyze the most cost effective available management strategy set. The resulting management strategies included a package of measures such as land use controls in the Lake Tahoe basin, urban runoff controls in Reno and Sparks and best management practices for wastewater discharge.