In most states, local health authorities issue building and operating permits to install septic systems in accordance with state laws to protect public health and reduce public nuisance. A septic system uses a natural filtration system, which in turn minimizes pollution.
If you move to a new Bauhaus with an existing tank, you are responsible for installing the septic tank. It is often cheaper to install a septic tank than to install new pipes to connect to the sewer system. Septic tanks tend to be more cost-effective than large underground sewers, which can be expensive to construct, install and maintain.