All Clear Septic and Wastewater Services All Clear Septic and Wastewater Services have cesspool services scheduled today in Wrentham, North Attleboro, Rehoboth, Swansea, Seekonk, Norton, and Attleboro, MA.  A cesspool is a pit which acts as both a settling chamber for solids and a leaching system for liquids.  The use of cesspools may overload the capacity of the soil to remove bacteria, viruses, and phosphorus, and to nitrify ammonia and organic nitrogen compounds.  A conventional septic system has a tank where solids can settle and begin to degrade, a distribution box, and a soil absorption system (SAS) that further treats the effluent by removing some of the bacteria, viruses, phosphorus, and nitrogen.  Title 5 does not require cesspools be replaced, however, if a cesspool that exhibits signs of hydraulic failure, is located extremely close to private or public water supplies, or otherwise fails to protect or pose a threat to public health, safety or the environment, it will need to be upgraded (310 CMR 15.303).  Also, cesspools must be upgraded prior to an increase in design flow (e.g., the addition of a bedroom to a home or seats to a restaurant).  If you require a cesspool service or replacement please do contact our office at 508-763-4431 or visit