Some of the functions of the Onsite Systems Division are:
- Co-review of OSDS equal to or greater than 5,000 gpd for compliance with the Large System Guidelines.
- Provide guidance on the applicability and design of alternative and innovative systems
- Provide guidance on the proper interpretation and enforcement of COMAR regulations 26.04.02, 26.04.03, 26.04.04 and 26.04.05, concerning onsite sewage disposal systems, subdivision of land, well construction and shared facilities
- Provide guidance for site and soil evaluation, construction inspections, and enforcement issues
- Provide or approve training for sand mound construction, at-grade mound construction, best available technology (BAT) installation, operation and maintenance of BAT systems and inspection of septic systems for property transfers
- Maintain a list of Individuals who have taken an approved course in the proper inspection of OSDS for property transfer
- Well Construction inspection and permitting
State Board of On-Site Wastewater Professionals & Registration for Individuals Providing On-Site Wastewater Service in Maryland
As of December 31, 2022, any individual performing any activity associated with the on-site disposal of wastewater must register with the Board. This includes the design, installation, operation and maintenance, pumping, repair or property transfer inspection of an on-site septic system.
- List of Registered On-Site Wastewater Professionals
- Application – Registration for Individual Performing On-Site Wastewater Services in Maryland
Lists of Certified Installers and Service Providers
- List of Certified Sand Mound Installers
- List of Certified At-grade Installers
- MDE Certified BAT Installers (Non Distributor Certified)
- MDE Certified O&M Service Providers for BAT (Non Distributor Certified)
Sand Mound Sewage Disposal Systems
- Sand Mound Manual
- Sand Mound Infiltrometer Testing Procedure
- Technical Advisory on Pressure Distribution Networks
- Preconstruction Checklist for Sand Mound Installers
- Inspection Checklist for Sand Mound Systems
- Sand Size Analysis for Onsite Wastewater Treatment Systems
At-grade Mound Sewage Disposal Systems
- At-grade Manual
- Pre-construction Checklist
- Installation Sequence
- Inspection Checklist for At-grade Mounds
For Professionals
- Guidance for Conducting Septic Inspections for Property Transfer
- CIDWT’s inspection checklists
- CIDWT O&M service provider checklists
Contact Info
If you have additional questions or would like more information, please contact the Wastewater Permits Program, On-Site Systems Division at 410-537-3778.
Additional Information and Related Links
- The Maryland Onsite Wastewater Professionals Association
- The Consortium of Institutes for Decentralized Wastewater Treatment
- The Mid Atlantic Association of Professional Soil Scientists
- National Onsite Wastewater Recycling Association
- The USEPA Onsite Wastewater Treatment Systems Manual
- National Association of Wastewater Technicians
- Delaware Technical Community College – Environmental Training Center
- COMAR 26.04.02-26.04.05
- Bay Restoration Fund
- Well Construction
- Groundwater Discharge Permits
- MDE home