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The septic system permit process ensures that onsite wastewater systems (like conventional or aerobic septic systems) are designed, installed, and operated safely.

An evapotranspiration (ET) septic system is required in certain situations where conventional or aerobic septic systems can't safely or effectively treat and disperse wastewater—especially in dry, arid regions with poor soil absorption and high evaporation rates.

Aerobic septic systems are required in certain situations because they offer enhanced wastewater treatment compared to conventional (anaerobic) septic systems. Here's why they may be required:

Aerobic spray systems are used to disperse treated wastewater from an aerobic septic system onto the ground surface, usually lawns or designated spray zones. They're used for practical, environmental, and regulatory reasons.

Aerobic drip systems are used as part of an aerobic septic system to disperse highly treated wastewater below the surface using a network of small-diameter tubing. These systems are designed for precision, safety, and flexibility in challenging site conditions.

A conventional septic system is the most basic and widely used method of onsite wastewater treatment for homes not connected to municipal sewer systems. It uses natural biological processes and soil filtration to treat household sewage.