I wonder if your experience also resulted from changes in use of road salt? I found this work done around the early 2000s: https://www.canada.ca/en/environment-

I wonder if your experience also resulted from changes in use of road salt? I found this work done around the early 2000s: https://www.canada.ca/en/environment-climate-change/services/pollutants/road-salts/code-practice-environmental-management.html https://www.canada.ca/en/environment-climate-change/services...