For this reporting period, Nevada assessed 1,631 miles of the 3,000 miles of accessible perennial streams for aquatic life uses.
Agricultural sources generate large sediment and nutrient loads.
Urban drainage systems contribute nutrients, heavy metals, and organic substances that deplete oxygen. Flow reductions also have a great impact on streams, limiting dilution of salts, minerals, and pollutants. Ground Water Quality - Not reported in a quantifiable format or unknown. Nevada lacks comprehensive ground water protection legislation, but the state does have statutes that control individual sources of contamination, including mining, underground storage tanks, septic systems, handling of hazardous materials and waste, solid waste disposal, underground injection wells, agricultural practices, and wastewater disposal. Land use statutes also enable local authorities to implement Wellhead Protection Plans by adopting zoning ordinances, subdivision regulations, and site plan review procedures.