Table 4.3
Top ten substances released to water according to
the National Pollutant Release Inventory, 2009
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Releases to water Note 1 | Share of total | |
---|---|---|
tonnes | percent | |
Nitrate (ion in solution at pH >= 6.0) |
55,724 | 47.1 |
Ammonia (total) Note 2 | 51,210 | 43.3 |
Phosphorus (total) | 6,053 | 5.1 |
Methanol | 1,544 | 1.3 |
Manganese (and its compounds) | 1,256 | 1.1 |
Ethylene glycol | 762 | 0.6 |
Chlorine | 303 | 0.3 |
Zinc (and its compounds) | 219 | 0.2 |
Total Reduced Sulphur (TRS) | 195 | 0.2 |
Benzene | 136 | 0.1 |
Includes direct discharges, spills and leaks.
Refers to the total of both ammonia (NH
3) and ammonium ion (NH4+) in solution.
Source(s):
Environment Canada, Pollutant Inventories and Reporting Division, 2011,
National Pollutant Release Inventory (NPRI) Downloadable Datasets, www.ec.gc.ca/inrp-npri/default.asp?lang=en&n=0EC58C98- (accessed
February 14, 2012).
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