My impression around here (southern Ontario) is that when this happens (high e.coli counts after heavy rain) this is mostly due to runoff from farms and from se

My impression around here (southern Ontario) is that when this happens (high e.coli counts after heavy rain) this is mostly due to runoff from farms and from seagull, goose etc feces, not human sewer overflows. Areas with high waterfowl populations are the worst for it.