What should I do if my septic system backs up?

Stop using all water immediately, do not flush toilets or run sinks. Locate the septic tank access lid and check for visible overflow. Call a licensed septic service provider for emergency pumping and inspection. Avoid using chemical additives or drain cleaners, as they can damage the bacterial balance in your tank. After the backup is cleared, have your system inspected to determine whether the tank needs pumping or the drain field has failed.