What are the Most Common Disposal Fields in Arizona for Septic Systems?

Disposal Fields in Arizona

What are the Most Common Disposal Fields in Arizona for Septic Systems?

In the heart of Arizona, septic systems play an essential role in managing wastewater for countless homes and commercial buildings. Did you know approximately 20% of homes in Maricopa County and about 35% of homes in Pinal County are on their own septic system? Yep, even in places like downtown Mesa, Phoenix, Scottsdale and Gilbert.

With varying terrains, soil types, and environmental considerations, there are multiple types of conventional disposal fields used in the state. In this article,  we will discuss the most common disposal fields, including seepage pits, leach lines, chamber fields, and leach beds, and touch upon advanced treatment fields for specialized needs.

Seepage Pits

Seepage pits are deep, vertical excavations filled with aggregate rock and perforated sewer pipe. They handle effluent or partially treated wastewater, allowing it to seep into the surrounding soil.


  • Suitable for properties with limited horizontal space.
  • Deep seepage helps in cases where the groundwater table is low.


  • May require regular maintenance to prevent clogging.
  • Not always the best choice for areas with dense soils.
Seepage Pit Construction Priority Pumping

Leach Lines or Rock Trenches

Also known as lateral lines, leach lines are trenches filled with gravel and lined with perforated pipes. They disperse wastewater across a broad area, allowing it to percolate down through the soil.


  • Distributes wastewater evenly.
  • Suitable for properties with expansive space.
  • Has a long lifespan


  • Might get clogged over time, requiring maintenance.
  • Can take up a large area of the property and make it unusable.

Chamber Fields

Chamber fields utilize plastic chambers instead of traditional gravel and pipe systems. These chambers create an empty space where wastewater can be temporarily stored before it percolates into the soil.


  • Reduced gravel requirement, which can be cost-effective.
  • Efficient wastewater distribution.


  • Proper installation is crucial to prevent system failures.
  • Might require more extensive excavation.
Picture of Tanya Wilson

Tanya Wilson

Tanya Wilson is the owner and CEO of Priority Pumping. She loves the wastewater industry and all of the opportunities for consumer education.

Leave a Replay

Sign up for our Newsletter

Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit