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What is the difference between a septic and a sewer system?
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The main difference between a septic system and a sewer system is that a septic tank treats waste in an anaerobic environment, while a sewer system transports wastewater to treatment plants or other facilities for further processing. In addition, a septic tank can be used with a drain field to treat greywater, whereas sewer systems are only designed to handle blackwater (human waste).