The four common sources of unwanted chemical pollution
1. Agricultural runoff
The soil does not always absorb rain or snowmelt. It runs through rivers, lakes and streams, or into the earth’s splits.
2. Urban and industrial runoff
Rainwater is urban and industrial. It flows over roads, buildings and plants. Transport pollutants to nearby waterways from built-up areas.
3. Lead pipes
Ageing infrastructure and outdated public plumbing networks are to blame. The piping and fixtures in homes and offices are leaching lead into the water.
4. Open-pit coal mining
Some Canadians believe that water is ‘mining’s most common casualty.’ That could be the case in Canada.