The Plant

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 WPCA Site

 

The Stamford Water Pollution Control Facility is designed to treat an average wastewater flow of 24 million gallons per day (MGD) from the City of Stamford and the Town of Darien.

There are four steps to the treatment of wastewater at the Stamford WPCA. They are Preliminary, Primary, Advanced Nitrogen Removal, and Ultraviolet Disinfection.

  • The Preliminary Process removes large objects from the water after it first enters the facility. These are materials that cannot be treated and are called screenings.
  • The Primary process removes easily settled materials from the wastewater.
  • Advanced Nitrogen Removal is a biological process which removes organic pollutants and nitrogen.
  • Ultraviolet Disinfection is the final step in the process where the water is disinfected before exiting the facility into the East Branch of Stamford Harbor.
Preliminary Treatment
Primary Treatment
Biological Treatment
Ultraviolet Disinfection
Sludge Processing

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