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Potential Effects of Contaminants on Fraser River Sockeye Salmon

Potential Effects of Contaminants on Fraser River Sockeye Salmon

Potential Effects of Contaminants on Fraser River Sockeye Salmon

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Table 5.13. Frequency <str<strong>on</strong>g>of</str<strong>on</strong>g> exceedance <str<strong>on</strong>g>of</str<strong>on</strong>g> the selected toxicity threshold for surface water in spawning and incubati<strong>on</strong> areas in the <strong>Fraser</strong> <strong>River</strong> Basin.C<strong>on</strong>taminant <str<strong>on</strong>g>of</str<strong>on</strong>g>C<strong>on</strong>cernAreas <str<strong>on</strong>g>of</str<strong>on</strong>g> Interest (AoIs)Nechako <strong>River</strong>Bowr<strong>on</strong> <strong>River</strong>Reference<strong>Fraser</strong> <strong>River</strong> BasinPre-1990 Post-1990 Pre-1990 Post-1990 Pre-1990 Post-1990 Pre-1990 Post-1990C<strong>on</strong>venti<strong>on</strong>als (mg/L)Residue: N<strong>on</strong>filterable(TSS)NutrientsNitrogen - Nitrite,dissolved (NO 2 )14% (14) 0% (1) ND ND ND ND 15% (542) 16% (823)0% (73) 0% (49) ND ND ND ND 0% (461) 0% (433)Major I<strong>on</strong>sChloride, dissolved 0% (36) 0% (25) ND ND ND ND 0% (505) 0% (902)Sulfate, dissolved 0% (2) ND ND ND ND ND 0% (524) 0% (624)MetalsAluminum, total 14% (21) ND ND ND ND ND 43% (129) 62% (510)Arsenic, total ND ND ND ND ND ND 0% (76) 0% (371)Cadmium, total 100% (3) ND ND ND ND ND 5% (120) 3% (451)Chromium, total ND ND ND ND ND ND 84% (43) 24% (466)Cobalt, total ND ND ND ND ND ND 3% (31) 0% (537)Copper, total ND ND ND ND ND ND 18% (133) 5% (447)Ir<strong>on</strong>, total 10% (21) ND ND ND ND ND 29% (291) 53% (515)Lead, total ND ND ND ND ND ND 0% (120) 0% (395)Mercury, total ND ND ND ND ND ND 30% (115) 100% (37)Nickel, total ND ND ND ND ND ND 0% (80) 0% (451)Selenium, total ND ND ND ND ND ND 2% (63) 3% (286)Silver, total ND ND ND ND ND ND ND 5% (354)OtherPhenols ND ND ND ND ND ND 0% (18) NDND = no data; TSS = total suspended solids.T-227

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