Water from RO or FS?

A UT Reader witnessed an activity that will raise the question of how blindly we all are consuming food that is sold in the market.

On his recent visit to Fateh Sagar in the morning, he found two boys taking water from the lake and filling around 5 water campers.

He smelt something fishy and started clicking their pictures. The boys found out about it and came fighting with him. When a crowd gathered, the boys minded their own business and went away.

The person who sent us the photographs alleges the boys to be working in some stall and selling tea/coffee and food items and using the lake water for the same.

However, UT could not retrieve the truth about the water usage, the intriguing fact remains that if the water from Lake FS is been used directly in the making of tea/coffee at FS, how much aware are we about it? And what can be done, if it holds true?