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• T.D.S. (total dissolve solids) meter measures salinity from dissolved solids. Reading of the Colorado River, here, indicates high salinity, May 1972

  • Uploaded by: U.S. National Archives
  • License: No known copyright restrictions
  • 0 comments
  • 5 favorites
  • 6,702 views
  • Date taken: 1972-05
  • Date uploaded: 2012-05-07
  • Tags: nara:arcid=549052, usnationalarchives, environmentalprotectionagency, documerica
  • Visibility: public