All sewage systems shall be classed as one of the following sewage system classes:
- Class 1 – A chemical toilet, an incinerating toilet, a recirculating toilet, a self-contained portable toilet and all forms of privy including a portable privy, an earth pit privy, a pail privy, a privy vault and a composting toilet system.
- Class 2 – A class 2 sewage system can only be used for the treatment and disposal of greywater (non- human body waste) i.e., kitchen sink wastes, bathtubs, washing machines, etc.
- This type of system is ONLY adequate to treat small amounts of greywater (less than 1000 litres per day) for premises such as cottages and hunt camps, etc.
- Class 3 – A cesspool used with composting toilets, including the Separett toilets.
- Class 4 – The most common type of sewage system, which is used to service single-family dwellings, multiple units, and commercial premises is Class 4. It is typically composed of a two-compartment septic tank and a leaching bed. The septic tank collects the raw sewage and helps in settling and digestion.
- Class 5 – a system which requires or uses a holding tank for the retention of hauled sewage at the site where it is produced prior to its collection by a hauled sewage system.
