Can drinking water line pass through a sewage chamber?

Hello,

Recently BWSSB has constructed a sewage chamber over cauvery water supply line in my area. The pipe is around 1 ft from the bottom of chamber. I am not sure if water supply lines can pass through sewage chamber. When I brought it to the attention of concerned engineer, he has not responded.

Please let me know if this is allowed? If not, how do I get it rectified? Who is the concerned authority who can resolve this?

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