*ERU stands for Equivalent Rate Unit. It is calculated by the number of square feet of impervious surface on your property. This is then divided by 1,500 square feet to come up with an ERU. 1,500 square feet was determined to be the most equitable basis of distribution.
The City of Flagstaff has revised the Stormwater Credit Manual (PDF). The Manual is a document which provides for discounts on your stormwater billing (as shown on your water bill) for certain stormwater controls such as detention basins, Low Impact Development (LID) facilities and Rainwater Harvesting. Many developments that have occurred since 1990 may be eligible for a discount. The discount may be applied to commercial, industrial or residential developments. As part of the application process, you will need to attest that the facility(s) are maintained on a regular basis by yourself or perhaps by a Homeowner's Association. If you believe you or the subdivision you live in, may have a stormwater facility that may apply, you are encouraged to apply for a discount.
To find out if your property may be eligible for a discount, please contact Monica Rabb at 928-213-2473. Please email the completed application to Monica Rabb or mail to City of Flagstaff Stormwater Manager: Monica Rabb, 2323 N Walgreens Street, Suite 1, Flagstaff, AZ 86004.