Chicago question on moving to individually metered water

[Gillian C.]

Hi Chicago folks. we have a 3-flat and we are looking at gutting the building to make the apartments individually metered for water and gas. Because our water bill is water, sewer, and trash, I'm wondering how this bill will split if we meter the water separately. Will Chicago now send us a bill for sewer and trash, or will they prorate trash to the tenants as well? Sewer is charged at 100% of water so I'm guessing/hoping that at least sewer will be pushed to individual units as well per their water usage, but wanted to confirm. Trying to figure out the total savings as we evaluate the ROI of this project. All thoughts welcome.