<!-- table at top of page with logo, picture, Application level, Management level, and input-output tables -->
{|width="100%"|style="width:50%;"|{santable{santable_new|
sys1=[[Blackwater Treatment System with Infiltration|5]]|
sys2=[[Blackwater Treatment System with Sewerage|6]]|
|spanish_link=Fosa_Septica
}}
|[[Image:Septic_tank.png |right|300px]]|}
[[Image:Icon_septic_tank.png |right|95px]]
'''A Septic Tank is a watertight chamber made of concrete, fibreglass, PVC or plastic, for the storage and treatment of blackwater and greywater. Settling and anaerobic processes reduce solids and organics, but the treatment is only moderate.'''