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STP · ETP · WTP · RO

Water Treatment Plants

Treated water for use and reuse, and wastewater that meets discharge norms.

We supply, install and commission water and wastewater treatment plants — sewage treatment (STP), effluent treatment (ETP), water treatment (WTP) and RO plants — so sites meet pollution control norms and reuse treated water wherever possible.

Reviewed by the Yonah Engineering technical team · Updated October 2026 · 3 Water Treatment projects in our portfolio

  • Pollution ControlNorms
  • Treated WaterReuse
  • O&MSupport

Key Services Include

  • Sewage treatment plants (STP)
  • Effluent treatment plants (ETP)
  • Water treatment plants (WTP)
  • Reverse osmosis (RO) plants
  • Pressure sand & carbon filters and softeners
  • Operation & maintenance support

Need Water Treatment Plants for your project?

Talk to our engineers for a free consultation, site survey and competitive quote.

Where We Work

Industries & Applications

Water Treatment Plants we design and install for every kind of facility.

  • Factories & process plants
  • Pharma & chemical units
  • Commercial buildings & IT parks
  • Hospitals
  • Hotels & hospitality
  • Industrial & logistics parks

Systems & Equipment

What We Install & Maintain

01

Sewage treatment plants

STPs with treated water storage for flushing and landscaping.

02

Effluent treatment plants

ETPs designed for the process effluent and discharge norms.

03

RO & filtration

Pressure sand and carbon filters, softeners and RO plants.

04

Water treatment plants

WTPs that turn raw water into process or drinking water.

Our Process

From Design to Handover

How we deliver safe, reliable Water Treatment Plants on every project.

  1. 01

    Site Survey

    Flow, raw water or effluent quality and site space.

  2. 02

    Design & Engineering

    Process design, plant sizing and layouts.

  3. 03

    Approvals

    Pollution control board consent documentation.

  4. 04

    Supply

    Tanks, filters, RO skids, pumps, blowers and dosing systems.

  5. 05

    Installation & Commissioning

    Installation, commissioning, operator training and handover.

Standards & Codes

Built to Recognised Standards

The design references our engineers work to on every project.

  • IS 10500Drinking water quality
  • CPHEEO ManualSewerage & sewage treatment
  • EP Rules 1986Effluent discharge standards
  • TNPCBConsent to operate (Tamil Nadu)

FAQs

Common Questions

Answers to what clients most often ask us about Water Treatment Plants.

Still have a question?Our engineers are happy to help.

What is the difference between an STP, ETP and WTP?

An STP treats sewage from toilets and kitchens. An ETP treats industrial effluent from process lines. A WTP treats raw water from a borewell or supply so it can be used for drinking or process work.

Can treated water be reused on site?

Yes. Treated STP water is commonly reused for toilet flushing, landscaping and cooling tower make-up, which cuts fresh water demand and cost.

How is a plant sized?

From the daily flow and the quality of the incoming water or wastewater, measured or estimated from occupancy and process data, with an allowance for peaks and future growth.

Do you provide operation and maintenance?

Yes. We commission the plant, train your operators and offer maintenance contracts to keep the plant within its discharge or quality limits.