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Volume : I, Issue : VIII, September - 2011 HYDROCHEMISTRY AND GROUND WATER QUALITY WITH SPECIAL REFERENCE TO NITRATE: A CASE STUDY FROM IPPATLA, KADAPA DISTRICT, ANDHRA PRADESH L. Chandra Sekhar Reddy, and K.V. Ramana Reddy Published By : Laxmi Book Publication Abstract : In order to understand the nitrate contamination in ground waters of Ippatla village, Kadapa (Dist), 20 ground
water samples were collected and analyzed for different parameters like, pH, electrical conductivity (EC), total
dissolved solids (TDS), hardness, K, Ca, Na, Mg, Cl and NO3.The main objective of this study is to know about the
ground water quality especially nitrate in the study area. In the study area the pH of water varies from 6.7 to 8.4
indicating alkaline in nature. The electrical conductivity ranging from 450 to 4500 micromhos/cm, total hardness
varies from 150 to 780 mg/l, TDS varies from 220 to 1200 mg/l, calcium values ranges from 45 to 280 mg/l,
magnesium ranges from 32 to210 mg/l, sodium ranges from 32 to 210 mg/l and potassium ranges from 0.3 to 12
mg/l. In the study area, the analysis of ground water shows that the concentration of nitrate (as NO3) varies from
5 mg/l to 390 mg/l. The average nitrate concentration in ground water of the study area is 148.7 mg/l, which are
significantly high as compared with guideline recommended by WHO. The concentration of nitrate is more than
permissible limit (45 mg/l) in 15 water samples out of 20 samples in the study area. 60% of samples in the study
area exceeded the upper limits 45 mg/l. Deeper wells have more NO3 concentration than shallow ones. Scatter plot
shows the positive correlation between nitrate and chloride emphasizes that fertilizers are the probable source for the
high values of nitrate and chloride. Nitrate and chloride concentrations in ground water were found to be lower in
areas where the land had remained fallow for longer period. However, NO3 and Cl concentrations were found high in
wells located in agricultural fields and where the land is in continual use. Thus, increased irrigation and fertilizer
use caused increased nitrate and chloride concentrations in ground water of the study area. Hence there is a need to
work out the optimum quantity of fertilizers that should be used for a particular crop in a particular area and to
educate the farmers on this aspect Keywords : Article : Cite This Article : L. Chandra Sekhar Reddy, and K.V. Ramana Reddy, (2011). HYDROCHEMISTRY AND GROUND WATER QUALITY WITH SPECIAL REFERENCE TO NITRATE: A CASE STUDY FROM IPPATLA, KADAPA DISTRICT, ANDHRA PRADESH. Indian Streams Research Journal, Vol. I, Issue. VIII, http://oldisrj.lbp.world/UploadedData/486.pdf References : - APHA (1985). Standard Methods for the Examination of water and waste water, 16th edition, American Public Health Association, USA.
- APHA (1992).Standard method for the examination of Water and Waste water, American Public Health Association. 18th ed.
- Bharatiya, K.G. and Agarawal (2004). High values of Nitrate and Chloride in Ground water and their possible source in parts of Chhotanagpur Granite Gneissic Complex : A Case Study from East and West Singhbhum and Saraikela Districts, Jharkhand. Proceedings: Workshop on Medical
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