The entire Lam Tin area is served by both tap water and flushing sea water supplies. The tap water is piped either from surface water or Dongjiang River into two service reservoirs and then pumped to individual households. The two service reservoirs that serve Lam Tin are Lam Tin Low Level Fresh Water Service Reservoir and Lam Tin High Level Service Reservoir. Built together with Lam Tin Estate, the low level reservoir is covered with a concrete-surfaced football field. The reservoir is now located between Kai Tin Estate and Tak Tin Estate. The high level reservoir, on the other hand, is farther away from residential estates. It is located near Lam Tin Park, on the slope of Black Hill.