Onsite Disposal Systems

Bay Restoration Fund Best Available Technology for Removing Nitrogen from Onsite Systems

The following systems are approved in Maryland within designated classes based on the level of Total Nitrogen (TN) removal capability shown.

Each unit has undergone a rigorous third-party testing process. Examples of third-party testing acceptable to the Department includes:

  • National Sanitation Foundation (NSF)
    • NSF 245
    • NSF 40 Class I
  • Bureau de Normalization du Québec (Canada)
    • CAN/BNQ 3680-600
  • European Committee for Standardization
    • EN 12566-3
  • University Study
    • Must be peer reviewed
    • Must be actual field work
    • Cannot be laboratory testing only

BRF Ranking Document: CLICK HERE​

As required by legislation, the Department must rank all Best Available Technology systems for removing nitrogen for onsite sewage dispersal systems. Rankings are to be provided for the following factors:

  • Total Nitrogen reduction for the technologies
  • Total Cost of the technology to include operation/maintenance and electrical consumption
  • Cost per pound for nitrogen reduction.

The Department is to provide to the public this ranking of BAT systems. This ranking is largely based on information provided by the vendors. The Department strongly advises the applicant to contact each vendor directly for more information.

The BAT Technical Review Committee is accepting applications for determining systems for consideration as BAT and eligibility for Bay Restoration Fund grants.

The following technologies have successfully completed field verification (BAT Class I):

Model Contact Information Certifications MDE Field
Performance Analysis for Total Nitrogen
Advantex®-
RT
Manufacturer
Orenco Systems®, Inc.
www.orenco.com/

Local Distributor

Eastern Region -
Service Energy
Paul Hufschmidt – 302-734-7433
phuffy@serviceenergy.com

Central, Southern, Western -
Atlantic Solutions
Bob Johnson- 1-877-214-9283
bjohnson@septicsystems.net
Other
3rd Party 
Mean % Reduction of TN:
76%

Mean Effluent Concentration:
14 mg/l

Data & Analysis
 
Advantex®-AX20 Manufacturer
Orenco Systems®, Inc.
www.orenco.com/

Local Distributor

Eastern Region - 
Service Energy
Paul Hufschmidt – 302-734-7433
phuffy@serviceenergy.com

Central, Southern, Western -
Atlantic Solutions
Bob Johnson- 1-877-214-9283
bjohnson@septicsystems.net
Other
3rd Party
Mean % Reduction of TN:
71%

Mean Effluent Concentration:
17 mg/l

Data & Analysis
 
Hoot® BNR Manufacturer
Hoot Aerobic Systems, Inc.
www.hootsystems.com

 Local Distributor -
Mayer Bros.
Nancy Mayer- (410) 796-1434
nancy@mayerprecast.com
Other 3rd
Party
Mean % Reduction of TN:
64%

Mean Effluent Concentration:
21 mg/l

Data & Analysis  
RetroFAST

 Manufacturer
Bio-Microbics, Inc.
http://www.biomicrobics.com

Local Distributors

Eastern Region -
Gillespie & Sons, Inc.
Jim Gillespie- (410) 778-0900
jimg@gillespieandson.com

Central Region -
Bay Area Environmental
Don Jones - (410) 836-9206
manager@jonespumpservice.com

ETV Mean % Reduction of TN:
57%

Mean Effluent Concentration:
25 mg/l

Data & Analysis

Limited to households of
1 to 4 occupants and 3 bedroom or less 
SeptiTech®

Manufacturer
SeptiTech, Inc.
www.septitech.com

Local Distributors

Eastern Region -
Gillespie & Sons Inc.
Jim Gillespie - (410) 778-0900
jimg@gillespieandson.com 

Central Region -
Bay Area Environmental
Don Jones - (410) 836-9206
manager@jonespumpservice.com

ETV
and
NSF 245
Mean % Reduction of TN:
67%

Mean Effluent Concentration:
20 mg/l

Data & Analysis  
Singulair TNT & Singulair Green (plastic tank) Manufacturer
Norweco, Inc.
www.norweco.com

Local Distributors

Eastern Shore -
Towers Concrete Products
John Short- (443) 786-0594
btowers62@gmail.com


Southern Region -
Superior Tank
Jeff Earnshaw- (301) 274-3772
superiortank@olg.com

Western Region -
C.R. Semler
Charlie Semler- (301) 824-2780
crsemler@crsemler.com

Western Region -
Garrett & Allegany Co.
Pile’s Concrete Products Co. Inc.
Brett Zimmerman- (814) 445-6619
brett_zimmerman@hotmail.com

Central Region -
Back River Pre-Cast LLC
Matt Geckle- (410) 833-3394
Other 3rd Party
and
NSF 245
Mean % Reduction of TN:
55%

Mean Effluent Concentration:
27 mg/l

Data & Analysis  

 

Listed below are the approved technologies that are currently under field verification (BAT Class II):

Model Contact Information Certifications Comments
AquaKlear Manufacturer
AquaKlear
http://www.aquaklear.net/

Local Distributor -
Care Utilities
Dave Care (410) 977-3453
careless32@comcast.net

Other 3rd Party
and
NSF 245

Under Field
Verification

Clear Rex Bubbler

CRB 1

Manufacturer
PekaSys, Inc.
www.pekasys.com

Local Distributor -
Eastern Shore and Anne Arundel County
Innovative Building Solutions
www.buildingsolution.net
Larry Price - (410) 643-6161
mail@buildingsolution.net

NSF 245
and Other

Under Field
Verification

Hydro-Action® - AN Series

Manufacturer
Hydro-Action/AK Industries Inc..
www.hydro-action.com 

Regional Distributor -
Blue Water Environmental, LLC
Mark O'Rourke - (240) 444-6401
mark@bwenvironmental.com.

 Local Distributors

Central-Eastern Region -
Sample Excavating Co. Inc.
Mike Sample - (443) 807-8639
sample415@yahoo.com 

Southern Region -
Outback Porta-Jon, Inc.
Steve Wilson- (410) 257-1600
wilson05@comcast.net

NSF 245

Under Field
Verification

MicroFAST

Manufacturer
Bio-Microbics, Inc.
http://www.biomicrobics.com

Local Distributors

Eastern Region -
Gillespie & Sons Inc.
Jim Gillespie - (410) 778-0900
jimg@gillespieandson.com

Central Region -
Bay Area Environmental
Don Jones - (410) 836-9206
manager@jonespumpservice.com

ETV
Under Field
Verification 
Nitrex  Manufacturer
Lombardo Associates, Inc.
www.lombardoassociates.com 

Local Distributor -
Lombardo Associates
Pio Lombardo- (617) 964-2924
pio@lombardoassociates.com
Other 3rd Party  Under Field
Verification

Add-on anoxic filter with
carbon source, to be coupled
with a nitrification unit.

Norweco Hydro-Kinetic
Model 600 FEU

Manufacturer
Norweco, Inc.
www.norweco.com

Local Distributor

Eastern Shore -
Towers Concrete Products
John Short- (443) 786-0594
btowers62@gmail.com

NSF 245
and Other

Under Field
Verification


The Maryland Department wants to thank you for partaking in this important program.

Contact Info

If you have additional questions or would like more information, please contact the Wastewater Permits Program, Bay Restoration Fund Program, 410-537-3778.

Related Links 

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