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T.D.S. TOTAL DISSOLVE SOLIDS METER MEASURES SALINITY FROM DISSOLVED SOLIDS. READING OF THE COLORADO RIVER HERE... NARA . Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor O'Rear Charles Photographer File TOTALDISSOLVESOLIDS METERMEASURESSALINITYFROMDISSOLVEDSOLIDS READINGOFTHECOLORADORIVER