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Potential Effects of Contaminants on Fraser River Sockeye Salmon

Potential Effects of Contaminants on Fraser River Sockeye Salmon

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Table 5.14. 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 juvenile rearing 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> InterestQuesnel <strong>River</strong> 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-1990 Pre-1990 Post-1990C<strong>on</strong>venti<strong>on</strong>als (mg/L)Residue: N<strong>on</strong>-filterable (TSS) ND ND ND 0% (17) ND 0% (44) ND ND 2% (102) 1% (86)NutrientsNitrogen - Nitrite, dissolved(NO 2 )ND 0% (318) ND 0% (12) ND 0% (48) ND ND 0% (200) 0% (592)Major I<strong>on</strong>sChloride, dissolved ND ND ND 0% (12) ND ND ND ND 0% (203) 0% (681)Sulfate, dissolved ND ND ND 0% (12) ND ND ND ND 0% (222) 0% (595)MetalsAluminum, total ND ND ND 0% (6) ND ND ND ND 19% (32) 20% (49)Arsenic, total ND ND ND 0% (15) ND ND ND ND 0% (1) 0% (58)Cadmium, total ND ND ND 47% (17) ND ND ND ND 9% (33) 24% (41)Chromium, total ND ND ND 33% (12) ND ND ND ND 100% (3) 35% (26)Cobalt, total ND ND ND 0% (17) ND ND ND ND 100% (1) 0% (61)Copper, total ND ND ND 0% (9) ND ND ND ND 2% (43) 0% (32)Ir<strong>on</strong>, total ND ND ND 0% (17) ND ND ND ND 6% (89) 17% (59)Lead, total ND ND ND 6% (16) ND ND ND ND 0% (33) 5% (21)Mercury, total ND ND ND ND ND ND ND ND 0% (47) NDNickel, total ND ND ND 0% (17) ND ND ND ND 0% (29) 0% (41)Selenium, total ND ND ND 0% (15) ND ND ND ND ND 0% (24)Silver, total ND ND ND 0% (9) ND ND ND ND ND 5% (22)OtherPhenols ND ND ND ND ND ND ND ND 0% (14) NDND = no data; TSS = total suspended solids.T-230

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