WMA — Wastewater Management Authority
How your house disposes of wastewater depends on whether a public sewer is available in your area. Find this out early — it changes both your plans and your budget.
1. First Question: Is There a Sewer in Your Street?
Ask the Wastewater Management Authority (WMA) whether the public sewer network is available at your plot.
- If yes — you apply to connect to the sewer, and no septic tank is needed.
- If no — you must provide on-site disposal: typically a septic tank with an absorption pit or soakaway.
Your architect must know the answer before finalising the plans, because the tank and pit need space, minimum distances from the house and boundaries, and suitable ground.
2. Connecting to the Public Sewer
Documents commonly required for a new sewer connection application:
- National Identity Card of the applicant
- Copy of the Title Deed of the property
- Site plan / location plan
- Building and Land Use Permit — see Building and Land Use Permit (BLP)
- Application form and applicable fee
⚠️ VERIFY — unconfirmed. The document list above is inferred from what other Mauritian utilities require (CWA — Water, CEB — Electricity), not from a WMA source. I could not reach a working WMA website to confirm the documents, fees, or application form. Contact the WMA directly before relying on this list, and ask your architect — they deal with this routinely.
The BLP guide does confirm that where a utility provider does not submit its clearance to the local authority within 5 days of a permit application, it is treated as having no objection. See Building and Land Use Permit (BLP).
3. On-Site Disposal — Septic Tank and Absorption Pit
Where no sewer exists:
- The septic tank and absorption pit must be shown on the drawings submitted with your BLP application — see Building and Land Use Permit (BLP).
- Sizing depends on the number of occupants and the ground's absorption capacity.
- Percolation of the ground matters. Rocky or poorly absorbing ground may require a larger pit or an alternative system. This is related to, but not the same as, the structural soil test in Buying the Land.
- Minimum separation distances apply — from the house, from boundaries, and critically from any borehole or water source. Confirm the current requirements with the local authority and WMA.
- Confirm explicitly whether the septic tank and pit are inside or outside your contractor's quoted scope — see Choosing a Contractor. This is a frequently excluded item.
4. Plan for Emptying
A septic tank needs periodic emptying by tanker. Make sure a tanker can physically reach the tank access point — this is easy to design out by accident and expensive to fix afterwards.