Septic tanks & wastewater treatment plants

Septic tanks and wastewater treatment in Singapore: prices and rules

Updated 4 November 2026

A septic tank in Singapore costs about S$589 to S$2,396 depending on capacity and material, approximately, according to sellers' websites, November 2026. Treatment powders and pods cost about S$27 to S$58 per pack. The fastest way to get an offer for your site is to describe the household size and the capacity you need in a request on BlaBlaPrice.

Tank prices are for listed sizes from 1,000 to 3,000 litres. Treatment products are sold as packs and pods, so check whether each price covers one month or one year of dosing.

Local rules that apply

Under Singapore's Sewage Treatment Plants Regulations, the Director may maintain privately owned sewage treatment plants, against a monthly fee set in the regulations. Public agencies enforce treatment standards and monitor plant performance, so ask any installer to show that the design meets the local requirements for your site before you pay.

Climate and when to install

Singapore is tropical, hot all year, with wet and dry seasons instead of winter. Biological treatment runs at warm temperatures all year, so there is no cold-season shutdown to plan for. Heavy rain in the wet season adds water to the ground around a tank, so schedule digging and installation for the drier months when you can.

How it is sized and bought here

Size comes first. A home is sized by the number of residents, and its tank is given in litres, while a treatment plant is rated in litres per day. Write the capacity in litres and ask for the daily flow rate. Confirm delivery to your city, which can be Singapore, Tampines, Jurong West, Woodlands or Ang Mo Kio, before you choose a tank.

What to write in your request

Say whether you need a tank or a treatment product, how many residents use the system, whether it is permanent or seasonal, the soil and water conditions if you know them, the volume in litres, and the make and model if you have them. Add the site address, your city and your budget.

On BlaBlaPrice you describe your need in your own words in a chat. The AI reads the request, asks for missing details and looks through sellers' websites and price lists in Singapore, then shows the prices and businesses it found. Sellers registered on BlaBlaPrice reply in the chat with their offer, and your contacts stay hidden until you choose to exchange them. You can also browse plumbing or building and renovation.