Microbial contamination of source water is a major environmental and health concern with drinking water in British Columbia (BC), Canada, and worldwide. Non-point sources of fecal contamination is difficult to determine. This project investigated concentrations and sources of fecal bacteria over 2 years from 4 watersheds with drinking water intakes. Over 48 E. coli isolates were classified to source using ribotyping. Results of this study showed that the concentration of fecal coliforms (FC) varied by year, month, and site, for each of the watersheds sampled.