A
Septic Tank System (STS) is the most common type of wastewater
disposal system for small village houses in areas where
no communal sewer is available.
2.
A STS can only perform well if it has been properly
sited, designed, constructed, used, desludged and repaired
when necessary.
3.
A proper wastewater disposal system (including STS) should
be installed for the disposal of both toilet waste and
sullage (i.e. wastewater from shower and sink etc.). See
diagram below. Disposal of sullage into surface channels
can be tolerated only if this does not result in pollution.
Where necessary, the Environmental Protection Department
(EPD) may require the responsible householder to install
proper facilities (e.g. a STS) for the disposal of toilet
waste and sullage. Pollution associated with the incorrect
disposal of wastewater can result in prosecution under
the Water
Pollution Control Ordinance.
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