alexa SEASONAL VARIATION AND ASSESSMENT OF WQI OF RAW WATER Q
ISSN: 1204-5357

Journal of Internet Banking and Commerce
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Research Article

SEASONAL VARIATION AND ASSESSMENT OF WQI OF RAW WATER QUALITY IN WATER TREATMENT PLANTS AT DELHI, INDIA

Priyanka Saxena*, Swantantra Kumar Dubey and Jagdish Kumar Bassin
National Environmental Engineering Research Institute (CSIR), NEERI Zonal Laboratory, Naraina Industrial Area, New Delhi-110028
Corresponding Author: Priyanka Saxena, National Environmental Engineering Research Institute (CSIR), NEERI Zonal Laboratory, Naraina Industrial Area, New Delhi-11002,E-mail:[email protected]
Received: 11 April 2014 Accepted: 30 April 2014
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Abstract

In the present study seasonal variation of physicochemical parameters of three types of raw water sources for the WTPs in Delhi has been studied. The sources of raw water for producing potable water in Delhi are Yamuna River, Ganga water from Uttar Pradesh, water from Bhakra through Haryana, Ranney wells and tube wells. Raw water samples for one year study (2011-2012) were collected from WTPs located at Wazirabad, Haiderpur and Bhagirathi in Delhi fortnightly. The samples were subjected to physicochemical analysis like pH, TDS, EC, Total Alkalinity, Total hardness, Ca hardness, Mg hardness, nitrate, chloride, sulphate, fluoride, sodium and potassium for various seasons; summer, monsoon, autumn, winter and spring. The results showed that most of the parameters exceeded the norms in winter season as compared to other seasons. Water Quality Index (WQI) was also calculated for all three sampling locations in different seasons. The results revealed that the water quality was excellent in monsoon and very poor in winter. The water is safe to use only after boiling and filtering or by Reverse Osmosis treatment for drinking purpose by the individuals.

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