STP Plant Cost in India (2026 Guide)

Understand sewage treatment plant cost per KLD, technology-wise pricing, and real factors that affect project budgets in India.

What Is the Cost of an STP Plant in India?

The cost of a Sewage Treatment Plant (STP) in India depends on multiple technical and site-specific factors. On average, STP plant cost ranges from ₹35,000 to ₹90,000 per KLD, depending on technology, automation, and discharge standards.

STP Cost by Capacity (Indicative)

10–25 KLD STP

₹6 – ₹15 Lakhs
Small apartments, schools, clinics

50–100 KLD STP

₹18 – ₹40 Lakhs
Hospitals, hotels, housing societies

200–500 KLD STP

₹70 Lakhs – ₹2 Crore
Industries, townships

Key Factors Affecting STP Plant Cost

  • ✔ Treatment technology (MBBR, SBR, MBR)
  • ✔ Inlet sewage characteristics
  • ✔ Treated water reuse or discharge norms
  • ✔ Automation & PLC requirements
  • ✔ Civil construction scope
  • ✔ O&M and AMC expectations

Technology-wise STP Cost Comparison

MBBR STP

Most economical
Low O&M
₹₹

SBR STP

Better control
Medium automation
₹₹₹

MBR STP

Highest quality output
ZLD compatible
₹₹₹₹

Why Choose A2Z Enviro Services?

A2Z Enviro Services designs STP systems with long-term performance, regulatory compliance, and minimum lifecycle cost in mind. We do not oversize or underdesign plants — every STP is engineered based on real flow and load data.

Get Exact STP Cost for Your Project
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