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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 5.16. 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 adult upstream migrati<strong>on</strong> routes 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> InterestLower Thomps<strong>on</strong> <strong>River</strong> North Thomps<strong>on</strong> <strong>River</strong> South Thomps<strong>on</strong> <strong>River</strong>Chilko <strong>River</strong>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)NutrientsNitrogen - Nitrite,dissolved (NO 2 )10% (59) 32% (93) 27% (22) 17% (59) 0% (40) 4% (46) 0% (2) 8% (12)0% (97) 0% (51) 0% (13) 0% (15) 0% (109) 0% (15) 0% (1) 0% (1)Major I<strong>on</strong>sChloride, dissolved 0% (97) 0% (134) 0% (50) 0% (59) 0% (68) 0% (46) 0% (1) 0% (1)Sulfate, dissolved 0% (67) 0% (118) 0% (50) 0% (53) 0% (59) 0% (38) 0% (7) 0% (15)MetalsAluminum, total 67% (6) 60% (10) 100% (2) 61% (33) 71% (14) 57% (35) ND 92% (12)Arsenic, total 0% (3) 0% (8) 0% (3) 0% (13) 0% (2) 0% (14) ND 0% (15)Cadmium, total 0% (4) 100% (2) 0% (3) 95% (21) 0% (1) 100% (22) 0% (1) 0% (14)Chromium, total 80% (5) 100% (8) 67% (3) 100% (6) 100% (3) 100% (4) ND 0% (15)Cobalt, total 0% (2) 0% (10) 0% (2) 0% (33) ND 0% (35) ND 0% (15)Copper, total 10% (10) 100% (1) 0% (5) 60% (5) 0% (1) 80% (5) 67% (3) 0% (14)Ir<strong>on</strong>, total 31% (16) 60% (10) 60% (10) 52% (33) 11% (19) 26% (35) ND 100% (2)Lead, total 0% (11) ND 0% (5) 100% (2) 0% (1) 100% (1) 0% (3) 0% (14)Mercury, total 0% (14) ND 0% (5) ND 0% (4) ND ND NDNickel, total 0% (3) 0% (2) 0% (2) 0% (21) 0% (1) 5% (22) ND 0% (14)Selenium, total 0% (1) ND 0% (1) 100% (1) ND 100% (1) ND 0% (15)Silver, total ND ND ND ND ND ND ND 0% (15)OtherPhenols 9% (11) ND ND ND 0% (2) ND ND NDND = no data; TSS = total suspended solids.T-235

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