• Ragini Kumari

Selected physico-chemical parameters of Manika Lake water were studied from January 2016-Decebmer 2016, to evaluate the purity of water of the Lake water. Here Temperature ranged between 100C to 360C, pH 7.5 to 8.3, Turbidity 38.0 NTU to 54.0 NTU, Alkalinity 124 mg/l to 158 mg/l, Hardness 118.0 mg/l to 158 mg/l, Dissolved Oxygen 4.3 mg/l to 8.7 mg/l, BOD 2.0 to 4.38, COD 22.6 to 48.4, Concentration of Potassium 3.2 mg/l to 4.6 mg/l, Nitrogen 0.21 mg/l to 0.41 mg/l, Phosphorus 0.14 to 0.42 mg/l and Electrical Conductivity from 248.62µS/cm to 560.36µS/cm respectively. From the data obtained here, it was noted that except few parameters such as Dissolved Oxygen was below the standard as given by WHO for fresh water during summer. Similarly, the value of Electrical Conductivity was above the given standard value from the month of June to December. Other parameters were within the limits.

Manika Lake Water, Monthly Variations, Physico-Chemical Parameters, Purity of water, Standard Value

"Study of Monthly Variations in Selected Physico-Chemical Parameters of Manika Lake Water at Muzaffarpur, Bihar (India)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 6, page no.i126-i135, June-2025, Available :http://www.jetir.org/papers/JETIR2506817.pdf

"Study of Monthly Variations in Selected Physico-Chemical Parameters of Manika Lake Water at Muzaffarpur, Bihar (India)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 6, page no. ppi126-i135, June-2025, Available at : http://www.jetir.org/papers/JETIR2506817.pdf