Total dissolved solids
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Total dissolved solids (TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.
Conductivity based TDS meter in a cup of water
Pyramid Lake, Nevada, receives dissolved solids from the Truckee River.
Aquarium at Bristol Zoo, England. Maintenance of filters becomes costly with high TDS.
Truckee River
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The Truckee River is a river in the U.S. states of California and Nevada. The river flows northeasterly and is 121 miles (195 km) long. The Truckee is the sole outlet of Lake Tahoe and drains part of the high Sierra Nevada, emptying into Pyramid Lake in the Great Basin. Its waters are an important source of irrigation along its valley and adjacent valleys.
The Truckee River just east of Truckee, California
The Truckee River at Verdi, Nevada, when the Central Pacific Railroad reached the site in 1868
The Truckee River in Truckee, California, with Donner Creek flowing in from the right
Aerial view from the south of the Truckee River where it drains to Pyramid Lake