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Subdivision Review Program

The Department of Environmental Quality Subdivision Program reviews divisions of land comprising  less than 20 acres, as well as condominiums and recreational camping vehicle and mobile home parks, regardless of the size of the parcel where they are located.  This review under the sanitation in subdivisions regulations is limited to sanitation facilities, including the water supply, sewage disposal, solid waste disposal, and storm drainage systems.  Proper design and location of these facilities is necessary to protect the quality of water for public water supplies, domestic uses, and other beneficial uses, including uses related to agricultural, industry, recreation, and wildlife.

Subdivisions are reviewed prior to creating the parcels to assure that adequate sanitation facilities can be constructed, operated, and maintained to support each parcel. Planning ahead for proper design and location of the facilities helps protect both our surface and ground water in Montana.  Design manuals have been developed to provide standards for wastewater treatment systems, water supply development, and storm drainage systems. The regulations also set out minimum separation distances between water supply sources and potential contamination sources such as wastewater treatment systems, surface waters, and floodplains.
The regulations and subdivision review are structured to prevent pollution problems through the proper design, location, operation, and maintenance of sanitation facilities.

Notice of Proposed Adoption

Vessel Pumpout Facilities  - No Public Hearing Contemplated.

If persons who are directly affected by the proposed action wish to express their data, views, or arguments orally or in writing at a public hearing, they must make written request for a hearing and submit this request along with any written comments they have to Elois Johnson at Department of Environmental Quality, P.O. Box 200901, Helena, Montana 59620-0901; phone (406) 444-2630; fax (406) 444-4386; or e-mail, no later than August 13, 2015.


How to perform a Nondegradation Analysis For Subsurface Wastewater Treatment Systems (SWTS) Under the Subdivision Review Process.

This document is intended for use as a guidance document to assist applicants and their agents to prepare and submit non-significance applications to the reviewing authority. This document does not have the force or effect of design circular, rule or statute; it is strictly to be used for informational and guidance purposes. Nondegradation Analysis