Northwest Septic Service, LLC is headquartered in Otis, Oregon. We are the only local septic system service provider on the Oregon Coast, capable of offering a full array of pumping, monitoring, inspection, maintenance and repair service for simple and technologically advanced systems in the residential and commercial sectors on the Oregon Coast and Western Willamette Valley. Northwest Septic Service, services Oregon's Central Coast including Yachats, Seal Rock, Toledo, Siletz, Newport, Depoe Bay, Lincoln City, Otis, Neskowin, Pacific City, Cloverdale, Hebo, Tillamook, Bay City, Garibaldi, Rockaway, Manzanita, Nehalem, Grand Ronde, Sheridan, Willamina and beyond.


Peter Robertson and Jana Grahn, Northwest Septic Service's founders, are lifelong residents of the Oregon Coast. With over six years in the septic service field on the Oregon Coast. Northwest Septic Service knows the business and have an excellent reputation with customers and associated professionals alike. Northwest Septic Service has the education, certifications and equipment to handle all types of septic systems and are the only local company capable to handle everything your septic system needs with one call.

Northwest Septic Service LLC:

PO Box 215 Otis, OR 9736


Some of the Services we provide:

  • Septic Tank Pumping
  • Septic System Inspection
  • Service Provider for AdvanTex┬« and other alternative treatment technologies.
  • Septic System Repair and Upgrades
  • Septic System Maintenance and Monitoring.
  • Video Diagnostic and locating
  • Hydrojetting

  • One call to Northwest Septic Service and we can handle all of your Septic needs.

    Septic Tank Pumping:

    Septic tanks need to be pumped out periodically. DEQ recommends pumping the septic tank every 3 to 5 years or when the solids reach 30%. Pumping intervals vary, depending on number of people using the system, size of the system, and type of usage Take the guess work out of pumping intervals and let Northwest Septic Service handle all of the dirty work with a maintenance program custom fit to your septic system.


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    Septic System Inspection:

    Septic System Inspection: Septic system inspections are primarily used during a home sale. Majority of all lenders will require the septic system be inspected just like they would for a home inspection. Northwest Septic Service is a certified septic system evaluator.


    Why inspect?

    The septic system is one of the most important "appliances" for a rural home. Septic system failure can lead to costly repair or replacement and pose a hazard to the environment and your family. Have peace of mind knowing that the septic system is functioning properly.

    What does a septic system inspection entail?

    With a septic system inspection from Northwest Septic Service, we go over the entire system. We use industry standard methods of determining the functionality of the septic system, as well as a state of the art sewer camera and locator to look deep into the system.


    Obtain any and all records from the governing agency.
    Ensure all records match what is in the ground.
    Inspect the Septic tank
    Check for leaks, cracks, corrosion
    Check liquid and solid levels
    Inspect all components of the tank.
    Inspect the drain field
    Locate the drain field
    Check for solids in the lines
    Inspect the integrity of the drain field.
    Provide a detailed DEQ approved report
    Notes and explanations to findings
    Maintenance suggestions to ensure longevity of the septic system


    Before, during or after the inspection, we are always happy to answer questions and provide suggestions for proper septic system maintenance.


    What is a septic system?

    Septic systems are designed to collect and purify the water that goes down the drains in your home. There are two main parts to a conventional septic system.


    1) Septic Tank The septic tank is a watertight container buried in the ground. It is designed to collect all of the sewage that comes from your home. For example, every time you flush a toilet, or do a load of laundry, you are sending sewage to your septic tank. When sewage enters the septic tank, the solids sink to the bottom of the tank (sludge) and oils float to the top of the tank (scum). All of the liquid between the sludge and scum layers is called effluent. Once the tank is full, waste-water flows from the septic tank to the drainfield


    2) Drainfield The drainfield, also called leach field, typically consists of a series of trenches that sit below the ground. These trenches are filled with a porous material and covered with soil. Effluent from the septic tank flows into the trenches. Microbes then treat the effluent, as it moves down through the soil profile below the trenches.


    Microbes are responsible for treating your waste!

    Northwest Septic Service LLC:

    PO Box 215 Otis, OR 9736

    Website is currently underconstruction check back soon.

    Proper maintenance is key to longevity of your septic system. Whether you have a standard gravity septic system or high tech advanced treatment septic systems, one thing remains the same. Septic systems need routine maintenance.