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Integrated Environment, Inc - Oklahoma Septic System Service, Pumping, and Aerobic

Soil Testing

Why do I need to get a soil profile test?

Because the Oklahoma Department of Environmental Quality requires you to have a current soil profile test on file prior to the installation of a septic system. Also, you can not get a bid from a septic contractor without a soil profile test. The first step to installing a legal septic system is to have a soil profile.

What does a soil profile tell you?

A soil profile test is going to identify what options a property owner has available to them from a septic system. There are several types of septic systems. The most common are conventional lateral lines and aerobic treatment systems. A soil profile will tell you which one is suitable for your site.


Percolation tests may only be used to identify suitable areas for the conventional subsurface system, lagoon, or aerobic system with spray irrigation. These tests measure the drop of water within a specific time period. The on-site sewage disposal system is designed based on the percolation rate (inches of water dropped per minute).


Soil profiles are a more scientific test and evaluate three critical aspects of the soil that may have the potential to cause an on-site sewage system to malfunction.

The Soil Profile tests:

  • The texture of soil in area of the proposed on-site sewage system
  • The presence or absence of water saturated soils
  • The depth to an impervious soil later (rock)

Did soil profile tests replace percolation tests (perc tests)?

Percolation tests have basically been replaced by soil profile tests. In Oklahoma you can not do a percolation test within 1320 feet of a tributary or waterway of the state, you must do a soil profile test. Many places in Oklahoma are within these boundaries and only a soil profile test can be done to design a septic system.

Is a soil profile test going to protect the environment and you?

Yes, a soil profile test will protect the environment and you. A septic system is a big expense. You want the latest test to ensure your septic system will work properly. Also, it will protect the water you drink. A soil profile test will ensure the sewage is filtered before it enters the subsurface water table, lake or stream. Soil profile tests are considered to be the mainstream test to design septic systems as of today.


Soil profiles can identify many limiting factors that could potentially cause a subsurface system to fail. The traditional soil test method, the percolation test, does not have the ability to identify these potential problems. In fact, the number one reason for a failing septic system is an inaccurate percolation test.

A main concern of the DEQ is protection of our groundwater. Soil Profiles give those running the test the ability to determine whether or not the groundwater will be affected by wastewater.

Because the Soil Profile Testing methodology is much more accurate and telling, we have chosen the Soil profile Testing method for our customers. It just makes sense to us that since a septic system is one of the most expensive components in your home that we use the best method to protect it.

We would be happy to answer any questions you may have about Soil Testing. Just contact us!