Maximum permissible concentration of copper in drinking water in mg/L

1.	Maximum permissible concentration of copper in drinking water in mg/L is
Answer» <html><body><p> 1.0</p><br/><br/><p>The 1959 WHO International Standards for Drinking Water suggested that concentrations of <a href="https://interviewquestions.tuteehub.com/tag/copper-933790" style="font-weight:bold;" target="_blank" title="Click to know more about COPPER">COPPER</a> greater than 1.5 mg/litre would <a href="https://interviewquestions.tuteehub.com/tag/markedly-7383007" style="font-weight:bold;" target="_blank" title="Click to know more about MARKEDLY">MARKEDLY</a> <a href="https://interviewquestions.tuteehub.com/tag/impair-498917" style="font-weight:bold;" target="_blank" title="Click to know more about IMPAIR">IMPAIR</a> the potability of the water. However, in the first edition of the Guidelines for Drinking Water Quality, published in 1984, a guideline value of 1.0 mg/litre was <a href="https://interviewquestions.tuteehub.com/tag/established-446764" style="font-weight:bold;" target="_blank" title="Click to know more about ESTABLISHED">ESTABLISHED</a> for copper, <a href="https://interviewquestions.tuteehub.com/tag/based-389387" style="font-weight:bold;" target="_blank" title="Click to know more about BASED">BASED</a> on its laundry and other staining properties.</p></body></html>

Maximum permissible concentration of copper in drinking water in mg/L is