Published on: January 21, 2023

RO units in Karnataka

RO units in Karnataka

officially Why in news? buy priligy in singapore IISc team reported  RO units in Karnataka villages waste more water and pollute source


  • RO water purification were mainly Installed to get rid of fluoride and uranium contamination from ground water
  • These units generate three times more waste water heavily loaded with the Flouride and uranium that go back to the source that pollute environment
  • Many villages in Chikkaballapur, Chitradurga, Kolar and Tumkuru wastewater carry a higher percentage of the same two contaminants
  • Waste water is discharged in open channels or drains and seeps into the ground, ultimately recharging the groundwater and further contaminating
  • There are also instances where the rejected water is being used for recharging the groundwater
  • Key problem was some of the RO units produced purified water with a very low concentration of fluoride, could lead to dental caries upon extended periods of consumption of such water.
  • According to WHO and Bureau of Indian standards fluoride, permissible limit in drinking water is in the range 5 to 1.5 mg/l.
  • Fluoride concentration below 0.5 mg/l (generated by some of the RO units) leads to dental caries.

Why are this units installed ?

  • There are more than 14,000 villages in eastern Karnataka with 80 per cent of them relying on ground water for drinking.
  • Water is not only heavily contaminated with fluoride, in 2020 occurrences of uranium in high concentration were found at many sites.
  • There is also high arsenic content in part of east Karnataka.

Way Forward

  • Government should consider the use of harvesting roof water and sourcing water from perennial lakes (tanks) in the vicinity of affected villages.
  • The other possibility is to condense water from the atmosphere, feasibility of the interior parts of the mainland needs to be studied.
  • Better maintenance of RO units would improve their performance