12-8-12: SEWAGE TREATMENT SYSTEMS:
   A.   DEQ Standards: For subdivisions that will create one or more parcels containing less than twenty (20) acres, the proposed method of disposing of sewage from each lot in the subdivision must comply with the design standards adopted by the DEQ and contained in the administrative rules of Montana (ARM 17.36.301, 17.36.302, 17.36.312, and 17.36.320 through 17.36.326). By this reference these DEQ standards are incorporated into and made a part of these regulations. Unless defined elsewhere in these regulations, the terms used in these standards will have the meanings assigned to them in ARM 17.36.101.
   B.   Less Than Twenty Acres: For subdivisions that will create one or more parcels containing less than twenty (20) acres, the subdivision must have been approved by DEQ or other authorized reviewing authority under the sanitation in subdivisions act, Montana Code Annotated sections 76-4-101 et seq., before the governing body can approve the final plat.
   C.   Twenty Acres Or More: For subdivisions containing parcels containing twenty (20) acres or more, the subdivider shall have demonstrated that there is an adequate water source and at least one area for a septic system and a replacement drain field for each lot before the governing body may approve the final plat. (Ord. 784, 8-6-2007)