AN INVESTIGATION INTO THE SANITARY CONDITION OF THE CENTRALIZED WATER SUPPLY IN THE TOWNS OF LULIANG PREFECTURE.

Objective:To know the sanitary situation of the centralized water supply in the towns of Luliang prefecture.Method:To investigate the sanitation of the centralized water supply in the towns of Luliang prefecture.Results:Only in 3 water supply units in which drinking water is contaminated,the drinking water sterile procudure has been carried out.Among the water sources within 30 metres investigated,the drinking water contamination makes up 27 59%;within 100 metres,the sewage irrigation 10 35%;and the farmland using chemical fertilizer 44 83%;and within 1000 metres,the industrial pollution 24 14%.After examining and determining the water quality in the area,water on grade A makes up 34 88%,while grade C or lower is 33 72%.The condition in the dry season is superior to that of the abundant period( P 0 05).The results show that the factors which limit the water quality refer to bacteriological index.Conclusion:The primary problems of centralized water supply in the towns of Luliang are the drinking water sterilization and the protection of water supply sanitation.