![Maximum permissible residual chlorine in treated water should be __________ mg/liter.](https://www.gkseries.com/blog/wp-content/uploads/2021/12/Maximum-permissible-residual-chlorine-in-treated-water-should-be-__________-mg-liter.png)
Q. Maximum permissible residual chlorine in treated water should be __________ mg/liter.
- 0.001 to 0.01
- 0.2 to 0.3
- 2 to 3
- 5 to 10
Answer: Option 2
Answer: Option 2
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