Drinking water quality monitoring and surveillance for safe water supply in Gangtok, India.

摘要: To ascertain the quality of drinking water being supplied, monitoring and surveillance was conducted in Gangtok city at various treatment stages, service reservoirs, distribution network, public standposts, households. No significant change raw observed on day-to-day basis. Residual chlorine found range nil to 0.2 mg/l sump water/finished water. Throughout year (i.e., during summer, winter, monsoon seasons), total coliform fecal counts were ranged from 7 CFU/100 ml 3 ml, respectively, Selep VIP complex plant; however, consumer end, those as 210 90 respectively. These variations bacterial among different reservoirs ends may be attributed general management practices for maintenance possibility enroute contamination. Evaluation indicates that is suitable after conventional followed by disinfection. The finished meets level standards described per Bureau Indian Standard specifications (BIS:10500 1991) potability terms its physicochemical characteristics.