drinking water corrosivity and sediment in the distribution network of kuhdasht, iran

background: corrosivity is one of the factors affecting the water quality. not controlling the chemical quality of water in the distribution network causes corrosion, sedimentation and economical and health damages. the aim of this study was to determine the drinking water corrosivity and sediment of kuhdasht, iran by using the corrosivity index. methods: in this study, 12 predetermined areas located in kuhdasht were regularly sampled in two stages. index values of langelier, ryznar, corrosivity and puckorius were calculated by using parameters such as temperature, calcium hardness, alkalinity, total dissolved solids, and ph. findings: the calculated index values was -0.47 (langelier), 7.86 (ryznar), 11.43 (corrosivity), and 6.49 (puckorius). conclusion: the results indicated that kuhdasht city water is tend to be corrosive. therefore, city authorities' interventions should be used to adjust ph and stabilize the water.