Potential Sources of Pollution Storm water runoff is a primary mechanism by which sediment, nutrient, and other pollutants are transported to tributary streams and to Lake Tahoe directly. Obviously, control of surface water quality will continue to be a principal objective of the regulatory agencies and, because of its potential impact on turbidities, a focus of the water purveyors utilizing Lake Tahoe as a raw water source. There are 103 sewer pump stations and numerous kilometers of sewer collection piping. No operating landfills exist in the Basin, nor are there any known water quality problems created by the four known closed landfills. Storm water runoff and water coming in contact with solid waste at the two transfer stations are pre-treated prior to discharge.
Truck routes pass through the Basin, creating the potential for hazardous spills.
In 1990, Nevada Division of Emergency Management reported eight spills in the Nevada portion, while the California Office of Emergency Services reported ten spills, mostly involving petroleum by-products. Septic tanks have been outlawed and most homes are connected to sewers. Collection system breaks can result in sewage flows into the watershed. The scenic beauty and recreational opportunities at Lake Tahoe make the Basin a favorite tourist attraction. Approximately 6,000 boats can operate on Lake Tahoe on a peak summer weekend.