ALL septic systems require maintenance at one time or another. Conventional systems need to have the septic tank pumped out to remove the solids and keep the system from backing up. It is recommended that you pump your septic tank every 3 to 5 years to prevent short circuiting of the treatment process. Aerobic systems are more complex and require more maintenance. Some maintenance may be performed by homeowners for systems using secondary treatment or dig irrigation, and surface application disposal. Some permit-ting authorities have adopted more stringent requirements, which may require homeowner training or even prohibit homeowner maintenance. Contacting a licensed maintenance provider to check, troubleshoot and test the system as required in 30 TAC 285.91 will help ensure that the system operates correctly. The maintenance provider inspects components of the system and notes whether every component is working each site visit. The maintenance provider will tell the homeowner of any problems or repairs that need to be made. Any required repairs that are not made will be reported to the permitting authority.Remember residential septic systems can handle only domestic sewage. Industrial or hazardous waste will ruin an onsite system by literally killing the bacteria that break down the biosolids. Septic Systems are designed to handle waste, not chemicals.