Septic | Edgewater NW

Edgewater NW began as a consulting firm specializing in onsite sewage treatment (septic) system design.

 Our original motto is:

"Solutions for Difficult Sites." 

We have designed many septic systems for properties that had been turned down as impossible sites. As a former county “ sanitarian” (Registered Environmental Health Specialist REHS working in Onsite Wastewater issues)we know what needs to be looked at and done to get results. We provide technical as well as regulatory know-how to overcome your property's challenging conditions.


In addition to design / consulting we also provide monitoring and maintenance for septic systems. This includes operations and maintenance (O+M)  for existing systems, cleaning, flushing and jetting pressure laterals and screen vaults in sand filters, recirculating gravel and Advantex textile filters. We take influent / effluent samples for laboratory analysis and we interpret those reports for the owner so that they understand how the systems operate.

We are an Authorized Dealer and Service Provider for Advantex AX systems. 

Unfortunately, as our practice has grown, we are no longer able to provide 


Septic System Inspectors. We are Oregon DEQ Septic Smart inspectors. We have done thousands of septic system evaluations / reports.

We have attended many workshops and training sessions including:

Operation and Maintenance of septic systems -

NW Onsite Wastewater Training Center (NOWTC)

High strength waste water treatment -

Washington On Site Sewage Association (WOSSA) and Stuth

Company (NCS-Stuth)

Advantex Residential System Design and Installation

Advantex Commercial System Design

Advantex Operation and Maintenance - Orenco Systems

Advantex Service - Orenco Systems

Washington Onsite Sewage Association Annual Meetings

Northwest Onsite Wastewater Treatment Short Course -

University of Washington

Southwest Onsite Conference

Onsite Wastewater Treatment Conference -

American Society of Agricultural Engineers

Edgewater NW is a General Contracting firm registered with

the Oregon Construction Contractors Board- CCB # 129137

We also provide troubleshooting / problem solving services.

Our technical staff gets regular training and updating in service techniques and technologies. 

A member of the staff is a licensed limited electrical contractor so that we can assure you that our installations and repairs are code compliant.

Our training includes:

Jurisdictional delineation of Wetlands -University of California, Berkeley

Hydric Soils - Oregon State University, Corvallis

Forest Science, Forest Hydrology, Soil Physics -Humboldt State University, Arcata, Calif.

Botany - University of California, Santa Barbara

Permaculture Design Course Certificate - Eugene, OR

© Robert vanCreveld 2020