TY - GEN AU - Soorya, M. AU - Shibu, K. TI - Water quality analysis of vellayani lake in Thiruvananthapuram, Kerala- Using national sanitation foundation water quality index PY - 2021/// CY - Mumbai PB - Indian Water Works Association KW - Civil Engineering N2 - Vellayani lake is the largest fresh water lake in Thiruvanthapuram. The water quality of the lake was affected by the activities occurring in the surrounding places. Here the water quality monitoring of vellayani lake was carried out for seven months from September 2019 to March 2020. The wate quality parameters pH, DO, BOD and fecal coliform are determined by a laboratory test ER -