One of the key principles of the revenue program is that every discharger should pay in proportion to his or her use of the system. As discussed under the Revenue Program, practical considerations make it impossible to meter every user's discharge. Consequently, Sanitation Districts estimates your discharge based on standard loading factors that correspond to the type(s) of facilities on your parcel. They recognize that you may have taken steps to conserve water (for which you should be applauded) and that your actual discharge may be significantly less than what we estimated. If that's your case, the low-water rebate program was designed just for you; it allows low-water users to apply for a reduced service charge.