The British Columbia Environmental Management Act defines pollution as the presence in the environment of substances that substantially alter or impair the environment. Pollution can result from naturally occurring events such as forest fires and floods, or from anthropogenic1 activities such as land development, industrial/municipal waste discharges, stormwater runoff, agriculture and forest harvesting. Pollution sources are generally classified as being either "point source" or "non-point source". A point source pollutant enters the receiving environment from a specific outlet such as a pipe, while a non-point source pollutant enters the receiving environment from a diffuse source that is not easily identifiable (1).Non-point source (NPS) water pollution is the release of pollutants to surface/ground water from activities that occur over a large area, and results from water flowing over (and through) the land surface and transporting contaminants (e.g. pathogens, oxygen depleting substances, suspended mate
Shead, Rod. 2004. Summary of Surface Water Quality Sampling on Sumas River and Tributaries. BC Ministry of Water Land and Air Protection
Keywords: Environmental Management Act, EMA
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