TCEQ requires all aerobic waste water systems be maintained by either a licensed Maintenance Provider or a certified property owner. Aerobic systems are more complex and do require more maintenance.
Per TCEQ, maintenance may be performed by homeowners for systems using secondary treatment or drip irrigation, and surface application disposal. Some permitting authorities have adopted more stringent requirements, which may require homeowner training or even prohibit homeowner maintenance. Check with your permitting authority to find out if it has adopted more stringent requirements.  Contracting with a licensed maintenance provider to check, troubleshoot and test the system as required in 30 TAC §285.91(4) will help ensure that the system operates correctly. The maintenance provider inspects components of the system and notes whether or not every component is working during each site visit. The maintenance provider will tell the homeowner of any problems or repairs to be made. Any required repairs that are not made will be reported to the permitting authority.
Having a professional routinely check your system ensures proper operation and health safety.