engineering recuitment PPSC JE Civil Mock Test 2022 Environmental Engineering Water Supply

As per IS 10500:2012, the permissible limits in absence of an alternate source of water for total hardness and total dissolved solids in the drinking water respectively will be (in ppm)

1
200 and 500
2
300 and 600
3
1000 and 600
4
600 and 2000
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