Maine Subsurface Wastewater Team

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Maine is a predominantly rural state, and relies heavily on decentralized sewage disposal facilities for disposal of human waste, i.e., septic systems. The State of Maine has regulated septic systems as a public health issue since 1920 to varying degrees. Over the years, the Maine State Plumbing Code, Subsurface Wastewater Disposal Rules (Rules) in their various versions have been administered by the Maine Center for Disease Control and Prevention (MECDC) and its predecessors.

The Subsurface Wastewater Team, within the MECDC's Division of Environmental Health, Drinking Water Program is charged under 42 MRS § 42 (3, 3-A, 3-B) to adopt rules which regulate subsurface sewage disposal systems, licensing of persons to evaluate soils for subsurface wastewater disposal systems, and inspection of plumbing and subsurface waste water disposal systems.

What's New at the Subsurface Wastewater Team

On this page:

Maine Rural Water Association Conference

Be sure to mark your calendars for MRWA's 34th Annual Conference on December 9, 10 and 11, 2014. This year they are moving to Bangor. This year an onsite wastewater disposal track has been added. Check the MRWA web site for more information or to register.


Update for Local Plumbing Inspectors

When installed inside a building advanced treatment devices are regulated by and subject to the Maine Internal Plumbing Rules. Associated disposal fields are still regulated by  the Subsurface Wastewater Disposal Rules.  For more information on the Internal Plumbing Rules LPIs are advised to contact the Plumbers Examining Board at (207) 624-8603.


New Form

The HHE-239 Form, Certificates of Approval, has been updated. This form is used by Local Plumbing Inspectors to keep track of installation inspections.


Policies Update

The Subsurface Wastewater Team is reviewing policies which are either outdated or have been superseded by revisions to the Subsurface Wastewater Disposal Rules. More information.


Products Page

The Subsurface Wastewater Team has scanned all the hardcopy product files in our possession and uploaded them as Adobe PDF files to this website. The PDF files are linked from the new Products page. No confidential information was copied to our knowledge.


Inspection Checklist for LPIs

A new checklist is available to assist Local Plumbing Inspectors during system installation inspections.


2013 Workshop Presentations

The PowerPoint presentations and video for the 2013 Basic and the Beyond the Basics workshops are available for viewing and downloading on our training page.


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Product Approvals

View the list of all approved products

OxyPro Mound Buster

The Aeration Systems LLC Mound Buster was originally designed and approved for use with the Aeration Systems LLC OxyPro System. The Division has approved the manufacturer's request that the Aeration Systems LLC Mound Buster be allowed for use in the State of Maine with any device which produces effluent with a combined BOD5 and TSS of less than 30 mg/L. Contact Aeration Systems for more information.


Infiltrator Systems, Inc.

Infiltrator Systems Inc.'s ATL System is a multiple component system for the treatment of domestic wastewater.  It consists of six concentric components: a four inch diameter pipe, large-diameter synthetic aggregate; coarse geotextile; small diameter synthetic aggregate; fine geotextile; and six inches of ASTM C33 system sand.  The first five components comprise cylindrical units  which are bedded in the ASTM C33 sand.  There is a minimum of 12 inches of sand between the units, six inches of sand below the units, and none above the units.  The units are rated at 5.0 square feet of effective area per linear foot.


Bio-Microbics, Inc.

Bio-Microbics' BioBarrier MBR consists of a multiple compartment tank providing primary and secondary treatment, and a membrane filter for solids removal. Permeate can be recirculated for nitrogen removal. BioBarrier MBR has been certified by the National Sanitation Foundation pursuant to ANSI/NSF Standard 40 for residential wastewater treatment systems; ANSI/NSF Standard 245 for nitrogen reduction; and ANSI/NSF Standard 350 for onsite residential and commercial water reuse treatment systems.


Infiltrator Systems, Inc.

Infiltrator Systems Inc. IM-1530 plastic septic tank has received approval for use in Maine.



SeptiTech advanced wastewater treatment systems have received approval for use of GRAF "Carat S" polypropylene tanks.


NORWECO Hydro-Kinetic Model 600 FEU

The NORWECO Hydro-Kinetic Model 600 FEU consists of a recirculating multiple tank system which incorporates primary, anoxic, and aerobic treatment followed by clarification and recirculation. The treatment tanks are followed by a separate tank containing the NORWECO Hydro-Kinetic FEU filter. The NORWECO Hydro-Kinetic Model 600 FEU has been certified by the National Sanitation Foundation (NSF) pursuant to ANSI/NSF Standard 40 for residential wastewater treatment systems and Standard 245 for nitrogen reduction.



The Stahlermatic Biological Solution for Wastewater (BSW) STM 8 and AQUA percolation modules have been registered by Winkler Aqua-Service Ltd. They comprise a system with an advanced treatment unit utilizing both aerobic and anaerobic processes and a proprietary disposal area device, each rated at 72 square feet of effective disposal area and intended specifically for use with the Stahlermatic BSW STM 8.


View the list of all approved products

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