Coulter’s Septic Service for Homes & Businesses

Serving Durham Region for 50 Years

Meeting Your Septic Pumping Needs

For over 45 years, Coulter’s Septic Services has been helping residential and commercial clients in the Durham region with their septic needs. Specializing in septic tanks, holding tanks and full inspections of your tanks, our knowledgeable and experienced staff goes the extra mile to ensure your septic tanks are working at full capacity. We care about the quality of our work. Our mantra is: We’re #1 in the #2 Business. And Solutions are our specialty! We care about our customers and that’s why we make educating you about your septic system a priority.

Family-Owned, Eco-Friendly

Being a family-owned business, we take great pride in doing quality work. Every job we do is a reflection on our family. That’s why you can count on us for that personal touch. Licensed by the Ministry of the Environment, you also can count on us to make the world a better place for all. By choosing us, you’ll get service that is:

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Competitively Priced

How often do you think of your septic system?

Like most people, out of sight means out of mind, so it is usually once a problem arises.

Such as:

  1. You notice a sewage odour.
  2. Your toilets, sinks or showers back up or take unusually long to drain.
  3. The grounds around your septic tank or leaching bed are flooded or soggy.
  4. The water level in your tank is higher than the outlet pipe.

Regular, proper maintenance by our knowledgeable staff helps to ensure good operation of your septic system for many years. View our F.A.Q. for more valuable information.

Chart (Click to Expand)

How often should I get my septic tank pumped?

Determining how often you need to have your tank pumped depends on the size of your tank and how many people live in the home. Preventative maintenance can save you a lot of money.

Generally, a septic tank should be pumped out at least every 3 years as regular maintenance. If there are 4 or more people residing in the home, more frequent pump outs are required. Please see the chart to the right as a guide.

Septic Tank Diagrams (Click to Expand)

What happens if my septic tank is not pumped regularly?

Organic waste, also know as sludge, builds up in the bottom of your septic tank. Over time, if not pumped out regularly, it builds up to the level of the outgoing pipe. It is then carried out to your leaching bed and pipes along with the grey water. As the sludge accumulates out in your bed, it eventually becomes blocked, backs up into your tank and then into your house. Ultimately, your septic bed will need replacing which is very costly and preventable with regular maintenance. Regular pumping of your tank helps to keep it healthy.

Contact Us

Oshawa Service


Whitby Service


Accounts & Billing Enquiries


Coulter's Septic Service

1050 Simcoe Street North, Suite 102

Oshawa, ON L1G 4W5

Come and See Us

Service Area

Durham Region • Oshawa • Whitby

Brooklin • Ashburn • Claremont

Uxbridge • Stouffville • Bowmanville

Courtice-Clarington • Blackstock

Orono • Ajax • Pickering • Port Perry

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