the residual lead effect in cows milk was studied in the Governant of Tartous. For this end,135 dairy cows in different milking seasons and from three different farm stationes (Zahed cow station,Cement factory farm station and Banias refinery cow station) were used. The objective of the study was to accurately determine lead concectrations in cows milk in the three different farms. Samples of milk,soil,water and feedstuff were collected and lead concentration was determined then statistically analyzed.