In this instalment we will examine TDS (Total Dissolved Solids) ... When the TDS is reduced severely it also affects the Ph of the water, which BIS specifies should be in the range 6.5-8.5.

On Aug. 21, the Pennsylvania Environmental Quality Board published regulations in the Pennsylvania Bulletin establishing new wastewater treatment requirements for Total Dissolved Solids.

NEW DELHI: In a bid to regulate the use of RO purifiers NGT has directed the government to prohibit them where total dissolved solids TDS in water are below 500 mg per litre and sensitise public ...