STP Cost in India (2026 Guide)
Sewage treatment plant costs in India depend mainly on capacity and technology. Compact packaged STPs for small buildings can start from a few lakh rupees, while larger MBBR or MBR plants for societies and industries run into tens of lakhs to crores.
How much does an STP cost by capacity?
| Capacity (KLD) | Indicative cost (₹) |
|---|---|
| 10–25 KLD | 4 – 12 lakh |
| 50–100 KLD | 12 – 35 lakh |
| 200–500 KLD | 35 lakh – 1 crore |
| 1 MLD + | 1 crore + |
KLD = kilolitres per day. Indicative for 2026; get an exact quote.
What factors affect STP cost?
- Daily flow (KLD) and peak load
- Treatment technology (ASP, SBR, MBBR, MBR)
- Required outlet quality and reuse standard
- Civil works, automation, and footprint constraints
What about operating costs?
Running costs cover power, chemicals, and maintenance, offset by savings from reusing treated water. Read how reuse works in our water recycling guide.
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Request a Free QuoteFrequently Asked Questions
Which STP technology is cheapest?
Conventional ASP is often lowest in capital cost, while MBBR and MBR cost more but save space and produce higher-quality reusable water.
Is an STP mandatory for apartments?
Many states require STPs for residential complexes above a certain size; check local building and pollution-control norms.
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