THE chaos which broke out in Tuen Mun after its water pumping station broke down was because of a lack of co-ordination between departments, the area's district board said yesterday. A special meeting of the Tuen Mun District Board said the Government's contingency plans were inadequate and called for them to be immediately revised. District Board member Tso Chiu-wau said that the response to the crisis was confused and badly managed. ''Some people were waiting for five hours for water because the tankers were late,'' he said. ''And because messages were not properly broadcast about when water would arrive, some residents siphoned it from fire hydrants and others became agitated and aggressive.'' Mr Tso said officers from the Water Supplies Department did not seem to be working with the police or housing estate authorities. ''There was little police presence and no-one took care of order . . . there was no planning about the distribution [of water],'' he said. A Water Supplies Department spokesman said the slow distribution of water was due to the fact 70 tankers had to be called in from all over the territory. The district board also attacked the Government for failing to properly investigate a road construction site as a cause of the flood. Mr Tso said work on the road linking Tuen Mun to Yuen Long had raised an area of land about four metres, filling in a stream. ''A channel had been built to replace the stream but it was blocked with debris from the construction, plastic bags and tree branches,'' he said. A Water Supplies Department spokesman said the investigation team was looking into the construction site as a possible cause.