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The Daily Insight

How do you get a perc test

Author

William Taylor

Published Mar 31, 2026

A typical perc test consists of two or more holes dug about 30 to 40 feet apart in the proposed drain field area (see illustration). The holes are typically 6 to 12 inches in diameter and 2 to 3 feet deep, the typical depth of the absorption trenches in a leach field.

What is required for a perc test?

A typical perc test consists of two or more holes dug about 30 to 40 feet apart in the proposed drain field area (see illustration). The holes are typically 6 to 12 inches in diameter and 2 to 3 feet deep, the typical depth of the absorption trenches in a leach field.

What can you do with land that doesn't perk?

OPTIONS IF SITE FAILS Even if your site fails a perc or deep-hole test, all is not lost. For sites with high water tables, you may be able to “de-water” the leaching area by strategically placing gravel-filled trenches and subsurface drain pipe to conduct water away from the drain field.

How expensive is a perk test?

Perc testing typically costs between $750 and $1,850, according to HomeAdvisor. However, that is just one portion of the testing cost. You may need to conduct additional tests before building, such as a deep hole test or a seasonal high water table test, which will add to the total soil testing cost.

How do you know if land will perk?

Suitability can be determined through a perc or perk test, formally known as a Percolation Test. This test determines the rate at which water drains through the soil. If the property does not pass the perk test, than a standard septic system cannot by installed. There are alternatives, but they can be very expensive.

How long are perc tests good for?

How long is a perc test good for? An Improvement Permit/Construction Authorization issued by a Local Health Department is valid for 5 years.

How do you make land PERC?

  1. Dig a 6″-12″ deep hole in your future greywater infiltration zone.
  2. Place a ruler (or stick marked in inches) in the bottom of the hole. …
  3. Fill the hole with water several times to saturate the soil. …
  4. Note the time.

Is a perc test the same as a soil test?

A Perc Test (also known as “Perk Test”, and more formally known as a Percolation Test), is a soil evaluation that tests the rate at which water drains through soil. … In order to determine if a septic system is possible, most county health departments will require a perc test.

Can you do a perk test in the winter?

For the best results, you should perform a perc test in the driest season. During this time, the water table will be at its lowest point, and the dry soil will more readily absorb liquid. However, if the soil is frozen or has recently absorbed a lot of rain or melted snow, the percolation results will be lower.

What does PERC mean for land?

A perc test is simply a test of the drainage — or percolation — ability of the patch of ground being assessed. But a perc test is not a perk of ownership for people developing land for residential and commercial use: It’s usually a requirement.

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How much is a mound system?

Mound Septic System Cost A mound septic system costs $10,000 to $20,000 to install. It’s the most expensive system to install but often necessary in areas with high water tables, shallow soil depth or shallow bedrock.

How does a septic tank work?

The wastewater is first transported through your pipelines to the septic tank. … The solids sink to the bottom of the tank as sludge while the liquids or lighter waster rise to the top. The lighter waste forms a scum layer at the top of the tank. The wastewater then flows into a second compartment of the tank.

Can you do your own perk test?

If you’re planning to install a new septic system, local ordinances will require you to conduct a soil percolation test. In some jurisdictions, you can do the test yourself, but in others, including some parts of California, you need a qualified professional to do it.

What is a good perc test result?

A good perc rate for a septic system is between 1 and 30 minutes per inch. Between 30 and 60 minutes per inch might require hydraulic analysis for installing a septic system. Anything under 1 minute per inch or over 60 minutes per inch is not an ideal perc rate.

Can you have a septic tank without a leach field?

The waste from most septic tanks flows to a soakaway system or a drainage field. … If your septic tank doesn’t have a drainage field or soakaway system, the waste water will instead flow through a sealed pipe and empty straight into a ditch or a local water course.

Is there an alternative to a septic system?

Mound systems work well as alternatives to septic tanks when the soil around your home or building is too dense or too shallow or when the water table is too high. Although they are more expensive and require more maintenance than conventional systems, mound systems are a common alternative.

Who performs a percolation test?

However, in most jurisdictions, a perc test will be performed by a licensed excavator. A county health department official will also be present during the test along with the owner. The excavator will typically dig two deep holes to test the drainage rate of the soil on-site.

What happens if you fail a percolation test?

Failing the percolation test If you still fail after that, you’d either have to discharge very well treated water to a watercourse (only an option in NI) or avail of a ‘zero discharge’ system (constructed wetlands that do not require emptying).

Do perc tests change over time?

Steve Bliss, of BuildingAdvisor.com, responds: A perc test measures the rate at which water is absorbed (percolates though) the soil. The time of year can definitely affect perc test results as well as the level of the water table, which is also a concern.

What does a high percolation rate mean?

Percolation Rate by Soil Category Sandy soils usually have very high percolation rates, measured in the range of 1 to 8 inches or more per hour. That means sandy soils dry out very quickly, heat up very quickly and do not hold nutrients for very long.

Can you do a perk test in the rain?

Ideally, a percolation test will be performed when the ground is saturated, or just following a significant rain storm. If it has not recently rained, you may want to repeat step 3 before conducting the experiment.

What is a soil test for septic?

A percolation test (colloquially called a perc test) is a test to determine the water absorption rate of soil (that is, its capacity for percolation) in preparation for the building of a septic drain field (leach field) or infiltration basin.

How deep is a perk test?

A typical perc test consists of three or more holes dug about 30 to 40 feet apart in the proposed drain field area (see illustration). The holes are typically 6 to 12 inches in diameter and two feet deep, the typical depth of the trenches in a leach field.

Who does SC perc test?

A perc test involves drilling or digging a hole in the ground, pouring water into it, and observing the rate at which water absorbs into the soil. It’s usually done by an official from the county health department with the owner of the property present and/or a licensed excavator.

How long does it take to get a perk test back?

A perc test takes anywhere from 1 to 6 hours, depending on the size of the land and soil composition.

What is a perk site in real estate?

A perk test is done on vacant land that does not have access to a public sewer system. The test determines the ability of the land to absorb and process the material from an onsite septic sewer system.

What is PERC real estate?

Perc is real estate jargon for “percolation”, a perfectly good word for the ability of soil to absorb moisture. Still, the word percolation manages to baffle people more accustomed to coffee percolation than septic systems. … Instead, country property typically relies on a technology called a “septic system”.

What is the cheapest septic system?

Conventional septic system These conventional septic systems are usually the most affordable, with an average cost of around $3,000.

How big of a septic tank do I need?

The larger your home, the larger the septic tank you’re going to need. For instance, a house smaller than 1,500 square feet usually requires a 750 to 1,000-gallon tank. On the other hand, a bigger home of approximately 2,500 square feet will need a bigger tank, more than the 1,000-gallon range.

How much does it cost to pump a septic tank?

How much does it cost to pump out a septic tank? The average cost is $300, but can run up to $500, depending on your location. The tank should be pumped out every three to five years.

What are the signs that your septic tank is full?

  • Your Drains Are Taking Forever. …
  • Standing Water Over Your Septic Tank. …
  • Bad Smells Coming From Your Yard. …
  • You Hear Gurgling Water. …
  • You Have A Sewage Backup. …
  • How often should you empty your septic tank?