SepticSmart Do's  and Don'ts  for an
Advanced Treatment  Unit  (ATU)
                              Advanced Treatment Units (ATUs), referred here to as an individual
                              residential system, are small biological treatment systems used to treat
                              wastewater to a higher degree than a traditional septic system.
       U.S. Environmental Protection Agency
ATUs are used in many states to achieve a higher-quality wastewater than
what exits traditional septic tanks. In fact, they are necessary in some areas
— either because of the sensitivity of the environment, or because of site
conditions. ATUs are also designed to reduce nutrient loadings, whereas
traditional septic systems are not
                              As with all septic systems, an ATU's proper functioning relies on regular
                              maintenance. Due to its advanced components, an ATU needs more
                              maintenance than a traditional septic system.
                              To ensure proper functioning, most states require annual operation,
                              maintenance, monitoring and reporting as a requirement of the
                              homeowner's septic permit. A maintenance provider should perform these
                              services. Contact the ATU manufacturer for information on maintenance
                              providers. The ATU manufacturer trains maintenance providers  to assure
                              they are familiar with the manufacturer's treatment system.
                              In addition to the Do's and Don'ts of Septic Systems. ATUs have some
                              additional do's and don'ts because of their advanced parts.
                              Follow Septic Sam's ATU do's and don'ts:
                              • Turn off any air supply device, alarm or
                                electrical component of the system.
                              • Bypass the system.
                              • Modify, cover or move any system
                                components without prior approval
                                from the service provider.
                              • Pump the ATU without service provider
                                approval or supervision.
                             • Use soaps and detergents that are
                               low-suds, biodegradable, and low- or
                             • Fix leaky fixtures.
                             • Use low-flow fixtures.
                             • Dispose of unused medications in the
                             • Substitute liquid fabric softener with
                               dryer sheets.
                             For more SepticSmart tips, visit
                                     EPA-832-F-14-008 • September 2014