Over several years, using the database published by the city's Department of Public Works that allows anyone to look up a water bill by typing in an address, 
I created a series of spreadsheets.

The spreadsheets show wildly fluctuating bills on
hundreds of city addresses
Errors are in the hunderds of thousands of dollars and are being paid for with tax payers dollars!
Private homes have been sold at tax sale due to an incorrect water bill!

Tax Dollars Down the Drain!