Total dissolved solids (TDS)

"Total dissolved solids means the total dissolved (filterable) solids present in a fluid as determined by use of the method specified in Title 40 of the Code of Federal Regulations (40 CFR) Part 136. UIC regulations protect water which has less than 10,000 milligrams per liter (mg/l) total dissolved solids. To put this value into perspective, most drinking water averages between 200 and 300 milligrams per liter total dissolved solids and water with TDS greater than 500 milligrams per liter is not recommended for human consumption. Therefore 10,000 mg/l is a very conservative value." (U.S. Environmental Protection Agency, 2014)


U.S. Environmental Protection Agency. Underground Injection Control Program Terminology. 2014. Link:…