Which cities in California require apartments to be submetered for water?

I know Ventura required it in a 2004 ordinance, but are there any other cities which also passed a law requiring multi-unit buildings to equip each unit with sub-meters separately measuring water consumed by the occupants of each individual unit? This is supposed to help conserve water, BTW -- individual tenants are billed for how much water they actually use instead of paying part of an apartment-wide share or it just being factored into the rent.

Public Comments

1. In Southern California, where fresh water shortage is a growing concern, this might be a good idea. Many cities in Southern California are already facing high water rates and water restrictions. Under such circumstances, tracking water consumption per individual would be helpful. If people know how much water they are consuming every month, they can try to conserve water at home and reduce their water bills. Here are some tips to conserve water at home: http://www.bewaterwise.com/tips01.html