micro:When will India's Public Work Departments take ownership of water quality like this.

The PWDs currenlty do tests like these, but I have never seen a notice or warning being posted like this one.

PS: Interestingly, I found this letter dated 22 Oct. 1872, mentioning Trimulgherry, a place very close to my house.

http://books.google.com/books?id=F_gIAAAAQAAJ&lpg=PA411&ots=mZAnaqiTnQ&dq=secunderabad%20public%20works%20dept%20water%20supply&pg=PA411#v=onepage