In this chapter:
I. "Equivalent residential unit" or "ERU" means the fee unit basis for all fees assessed by a stormwater utility.
II. "Stormwater" means surface runoff and drainage that is generated from precipitation and snowmelt, including any debris, chemicals, sediment, or other substances carried along with the water.
III. "Stormwater utility" means a special assessment district established to generate funding specifically for stormwater management.
IV. "Stormwater utility commission" means the governing body managing the activities of the stormwater utility. When the utility encompasses more than one municipality, representation on the commission shall be proportional to the number of fee units within each jurisdiction.