The City of Madison Water Utility has proposed a $100 rebate for homeowners who buy low-flow toilets.
See the Wis State Journal article here: www.madison.com/wsj/topstories/301112
Read background about the Water Utility Water Conservation and Sustainability Plan here: www.ci.madison.wi.us/Water/Documents/waterconservationop-eddraft2.pdf
The full (draft) Plan is available here: http://legistar.cityofmadison.com/attachments/852f8ee9-36af-4818-9977-dd1076349beb.pdf
Madison's water conservation goals are here:
http://legistar.cityofmadison.com/attachments/4bf2c152-b2ac-4c17-b367-0ee476bb239d.pdf