Setting up separate metering for water/sewer in Mesa AZ on Duplex

[Vincent Treola Jr.]

Question for everyone, im purchasing couple duplexes in Mesa AZ and each one has single Water meter. It has been paid by the previous owners but just got to look at the bill and its way more then it should be and i would like to get the metering setup so the renters pay their own water and sewer(and thus waste less). Has anyone done this before, who do you contact/work with to get this done? what costs are involved?  they pay separate electric already, each unit has its own water heaters. there is external shutoffs for each unit near the external spigots but a single meter in the back for both. any help/advice is appreciated

thx

Vince