The SoCal Water$mart program provides financial incentives to encourage customers to choose high-efficiency toilets (HETs). Toilets are by far the main source of water use in the home, accounting for nearly 30 percent of an average home's indoor water consumption. Recent advancements have allowed toilets to use 1.28 gallons per flush or less while still providing equal or superior performance. Qualifying HETs must be from the list of approved models. Rebates are up to $100 per toilet.