Pockets of groundwater of Payakapuram, Ajitsighnagar, Kandrika, and Christurajapuram are highly saline and therefore not potable, according to a study made on the groundwater quality in the city.

Groundwater Deputy Director A. Varaprasada Rao told The Hindu that in the first phase 81 samples from different wells in and around the city were collected and in the second phase the number was restricted to 31.The water samples had been collected from the existing private owned wells. The samples were collected twice a year along with the samples from wells in the rural areas.

Analysis

The samples were tested for pH (acidity), electrical conductivity, total dissolved solids (TDS), the quantity of Cations such as Calcium, Sodium, Magnesium, and Potassium, Anions such as sulphates, chlorides, and nitrates, and the hardness of the water.

Mr. Varaprasad said the chemical analysis of the water samples in the city indicated that by and large the water was suitable for drinking and other domestic purposes. The groundwater in a few pockets in Payakpuram, Singhnagar, Kandrika, Christhurajapuram, and Autonagar were highly saline and were not fit for drinking and other domestic purposes.

For easier understanding, the quality of water with regard to different parameters has been categorised into desirable limits and permissible limits.

The TDS of groundwater in Rajiv Nagar, Collector’s Camp Office, Ramalingeswaranagar, Kamaiahthopu was near “desirable limits.” In rest of the city, except the places where the water was not potable, the TDS in the groundwater was near the “permissible limits.”

Calcium limits

Calcium was within desirable limits in the city and permissible in the groundwater of Vidhyadharapuram, Kothapeta, K. Kandrika, Machavaram, Christhurajapuram, and Autonagar areas.

Magnesium was above permissible limits in the groundwater of K. Kandrika, Christhurajapuram, and Autonagar.

In the analysis for Anions, nitrates were very high in the groundwater of Brahmin Street and Machavaram and this was because of local contamination, Mr. Prasada Rao said.

The groundwater all over the city was hard. But it was moderately soft in Gollapudi, Brahmin Street, Gandhinagar, Rajivnagar, and the Collector’s Camp Office.

The groundwater was hard in Wynchipet, S.N. Puram, Gunadala, Kamaiathopu, and Ramalingeswaranagar.

It was categorised as “very hard” in Vidyadharapuram, Kothapeta, Chittinagar, Nainavaram, Kedareswarapet, Madhunagar, Machavaram, Executive Club, Vijayanagar colony, Sanathnagar, New Sanathnagar, Benz Circle, Governorpet, and Suryaraopet.

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