How to Reduce High Water Bill at Apartment Complex

[Sabrina Baldwin]

I have an 8 unit apartment building and currently the water, sewer and trash is included in residents' rent. Each unit is a 2 bdrm and the rents range from $540-$575. The water is billed based upon usage and it continues to go up every quarter. We've checked for leaks and found a few and we are now looking into changing out some of the plumbing fixtures over time to help reduce water consumption.

Anyone have suggestion or other ideas to reduce costs and pass expenses on to the residents?