If you live in Arizona and have a septic system, sizing your septic tank properly is crucial. An undersized tank can lead to premature failure and costly repairs or replacements. Here’s what you need to know about determining the right septic tank size for your Arizona home.

Septic Tank Sizing Requirements


In Arizona, septic tank sizing requirements are based on the number of bedrooms in the home. The minimum capacity for septic tanks is:

– 1 or 2 bedrooms: 1,000 gallon tank
– 3 bedrooms: 1,250 gallon tankĀ 
– 4 bedrooms: 1,500 gallon tank
– Each additional bedroom over 4: Add 250 gallons

These are just the minimum sizes. For optimal performance, many experts recommend going a size larger than the minimum requirement. Bigger tanks mean more capacity and longer times between needing to be pumped out.

Other Sizing Factors

In addition to the number of bedrooms, there are other factors that can impact the recommended septic tank size:

– Household water usage habits
– Whether you have a garbage disposal
– If you have a jacuzzi tub or whirlpool
– The soil percolation rate on your property

An experienced septic professional can evaluate these variables and recommend an appropriately sized system.



FAQS

For a typical 3-bedroom home, most experts recommend pumping the septic tank every 3-5 years. More frequent pumping may be needed for larger households

Yes, signs of an undersized septic tank include frequently clogged drains, soggy spots in the drain field, and sewage odors in the home or yard.

Yes, permits are required from the county for septic system installation or replacement in Arizona. Black Mountain Septic Services, an approved licensed septic professional can handle the permitting process.