Beginning January 1, 2018, the rebate structure will be modified:

Only WaterSense-labeled toilets using 1.1 gpf or less will be eligible for the $100 rebate. A $50 rebate will be available for all other WaterSense-labeled toilets greater than 1.1 gpf.

All eligible applications postmarked by December 31, 2018 will qualify for the $100 rebate if the toilet is WaterSense-labeled 1.28 gpf or less.