Environmental Monitoring and Assessment

, Volume 168, Issue 1–4, pp 489–497 | Cite as

Trihalomethane formation potential in treated water supplies in urban metro city

  • Aziz Hasan
  • Neeta Pradip Thacker
  • Jagdish Bassin


Trihalomethane (THM) formation potential (TFP) is very useful test to assess the level of the formation of trihalomethanes in worst case scenario. Organics in water have the potential to generate harmful disinfection by-products (DBPs) such as THMs, as a result of their reaction with disinfectant chlorine used in drinking water. DBPs are increasingly recognized as cancerous agents. TFP of postchlorinated treated water were investigated at six water treatment plants (WTPs) in Delhi City (India). The present paper presents the current trends of TFP so that prevention and control measures can be initiated by the regulating agencies responsible for drinking water supply. Liquid–liquid extraction method, followed by qualitative and quantitative estimation by gas chromatograph equipped with electron capture detector, had been used for the determination of THMs in water samples collected at the outlet just before supplying to the consumers during 2000–2007. The TFP values from 2004 onward of all WTPs did not exceed the WHO guideline value of ≤1.


THM TFP DBP pH Temperature Residual chlorine 


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Aziz Hasan
    • 1
  • Neeta Pradip Thacker
    • 1
  • Jagdish Bassin
    • 2
  1. 1.Analytical Instruments DivisionNational Environmental Engineering Research InstituteNagpurIndia
  2. 2.Delhi Zonal LaboratoryNational Environmental Engineering Research InstituteNew DelhiIndia

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