Septic tanks & wastewater treatment plants

Septic tanks and wastewater treatment plants in the Philippines: prices

Updated 4 November 2026

In the Philippines, an enzyme or microbial treatment for a septic tank costs about ₱1,000 to ₱2,800, a polypropylene septic tank of 2,000 to 2,500 litres about ₱6,000 to ₱29,300, and a household sewage treatment plant about ₱190,000 to ₱318,000. To get offers for your site, send one request on BlaBlaPrice.

Rules that apply to your system

Untreated effluent from septic tanks and sewage treatment plants may not be discharged into bodies of water, according to a regulation text in the snippets. A 2019 Department of Health administrative order sets the national standard for the design and construction of septic tanks, and it applies to household and public sewage projects. The Clean Water Act of 2004 (Republic Act 9275) is cited for regular desludging and maintenance. Some provinces, such as Bataan, have their own septage ordinances with penalties. Ask the installer to show how the design follows the national standard before work starts.

Season and rainy weather

November is near the end of the wet season in most of the country, so the ground is often saturated. Heavy rain can slow digging and flood drainage areas, so plan installation for the drier months from December, or check the soil and water conditions on site before digging in the rains. Holiday homes that are used only seasonally should also book desludging before the rains.

What to write in your request

Give the number of residents, whether the home is permanent or seasonal, the expected wastewater volume per day in litres if you know it, and the soil and water conditions on the site. Name your city (Manila, Quezon City, Cebu City, Davao City or Makati) and the site address, so the seller can quote delivery and installation there. Say whether you need a tank, a treatment plant or only maintenance products, and add your budget in pesos. Ask whether the quoted price includes delivery and installation.

Describe what you need in your own words in the chat, and add a photo if you have one. BlaBlaPrice is free for buyers: it asks for missing details, looks through sellers' websites and price lists in the Philippines, and shows the prices and businesses it finds. Sellers registered on the site reply in the chat with their price, terms and delivery, while your contact details stay hidden until you decide to share them. You can also send the request link to local sellers you know. Browse plumbing and building and renovation, or start on the home page.