Navi Mumbai: Fresh scientific tests have raised serious concerns over the deteriorating health of DPS Flamingo Lake at Nerul in Navi Mumbai with polluted creek water entering the wetland during high tides emerging as a major threat to the fragile ecosystem that forms part of the Ramsar-listed Thane Creek Flamingo Sanctuary (TCFS). The latest laboratory analysis of water collected from the tidal inflow channel has revealed contamination levels far exceeding permissible standar