Improvements in fish polychlorinated biphenyl and other contaminant levels in response to remedial actions in Hamilton Harbour, Ontario, Canada
Keywords:
Area of Concern, mercury, Great Lakes, temporal trends, fish consumptionAbstract
Hamilton Harbour, located in Ontario, Canada at the western end of Lake Ontario, is recognized as one of the most anthropogenically-impacted regions within the Great Lakes and is currently listed as an Area of Concern. One of the Beneficial Use Impairments for the harbour has been restrictions on fish consumption due to elevated contaminant levels. In this study, we examined past and recent fish contaminant data collected by the Ontario Ministry of the Environment and Climate Change in partnership with other agencies to evaluate temporal trends in fish contaminant concentrations. Measurements for both resident and migratory sport fish as well as juvenile/forage fish were considered, with analysis focused on polychlorinated biphenyls, the group of chemicals identified as the major contaminant of concern. Current contaminant levels were evaluated against fish consumption advisory benchmarks used by Ontario Ministry of the Environment and Climate Change, and compared with corresponding observations for other locations across the Great Lakes, including other Areas of Concern. The results show statistically significant improvements in fish contaminant levels within Hamilton Harbour, with recent fish mercury concentrations below the first advisory benchmarks for all species included in this study. Polychlorinated biphenyl concentrations declined by 59–82% from historical levels, although this decline was not statistically significant in Brown Trout, Common Carp, Freshwater Drum and White Sucker. Further, all species exhibit recent polychlorinated biphenyl concentrations above the first consumption advisory benchmark of 105 ng g−1. Compared to other Great Lakes locations, including other areas of concern, Hamilton Harbour polychlorinated biphenyl concentrations remain amongst the highest. The results suggest that recovery of Hamilton Harbour is still on-going.
References
Awad, E., Zhang, X., Bhavsar, S.P., Crozier, P.W., Reiner, E.J., Fletcher, R., Tittlemier, S.A., Braekevelt, E., 2011. Long-term environmental fate of perfluorinated compounds after accidental release at Toronto airport. Environ. Sci. Technol. 45, 8081–8089.
Bhavsar, S.P., Awad, E., Fletcher, R., Hayton, A., Somers, K.M., Kolic, T., MacPherson, K., Reiner, E.J., 2008. Temporal trends and spatial distribution of dioxins and furans in lake trout or lake whitefish from the Canadian Great Lakes. Chemosphere 73, S158–S165.
Bhavsar, S.P., Awad, E., Mahon, C.G., Petro, S., 2011. Great Lakes fish consumption advisories: is mercury a concern? Ecotoxicology 20, 1588–1598.
Bhavsar, S.P., Gewurtz, S.B., Helm, P.A., Labencki, T.L., Marvin, C.H., Fletcher, R., Hayton, A., Reiner, E.J., Boyd, D., 2010a. Estimating sediment quality thresholds to prevent restrictions on fish consumption: Application to polychlorinated biphenyls and dioxins-furans in the Canadian Great Lakes. Integr. Environ. Assess. Manag. 6, 641–652.
Bhavsar, S.P., Gewurtz, S.B., McGoldrick, D.J., Keir, M.J., Backus, S.M., 2010b. Changes in mercury levels in Great Lakes fish between 1970s and 2007. Environ. Sci. Technol. 44, 1–15.
Bhavsar, S.P., Jackson, D.A., Hayton, A., Reiner, E.J., Chen, T., Bodnar, J., 2007. Are PCB Levels in fish from the Canadian Great Lakes still declining? J. Great Lakes Res. 33, 592–605.
Bhavsar, S.P., Zhang, X., Guo, R., Braekevelt, E., Petro, S., Gandhi, N., Reiner, E.J., Lee, H., Bronson, R., Tittlemier, S.A., 2014. Cooking fish is not effective in reducing exposure to perfluoroalkyl and polyfluoroalkyl substances. Environ. Int. 66, 107–114.
Dermott, R., Johannsson, O., Munawar, M., Bonnell, R., Bowen, K., Burley, M., Fitzpatrick, M., Gerlofsma, J., Niblock, H., 2007. Assessment of lower food web in Hamilton Harbour, Lake Ontario, 2002 - 2004. Can. Tech. Rep. Fish. Aquat. Sci. 2729.
Environment Canada, Ontario Ministry of the Environment, 2010. Hamilton Harbour Area of Concern: Status of Beneficial Use Impairments. Queen's Printer, Toronto, Ontario.
Gandhi, N., Bhavsar, S.P., Tang, R.W.K., Drouillard, K.G., Arhonditsis, G.B., 2014. Significance of toxaphene in Great Lakes fish consumption advisories. J. Great Lakes Res. 40, 71–79.
Gewurtz, S.B., Bhavsar, S.P., Fletcher, R., 2011. Influence of fish size and sex on mercury/PCB concentration: importance for fish consumption advisories. Environ. Int. 37, 425–434.
Gewurtz, S.B., Bhavsar, S.P., Petro, S., Mahon, C.M., Zhao, X., Morse, D., Reiner, E.J., Tittlemier, S.A., Braekevelt, E., Drouillard, K.G., 2014. High levels of perfluoroalkyl acids in sport fish species downstream of a firefighting training facility at Hamilton International Airport, Ontario, Canada. Environ. Int. 67, 1–11.
Hall, J.D., O'Connor, K., Ranieri, J., 2006. Progress towards delisting a Great Lakes Area of Concern: the role of integrated research and monitoring in the Hamilton Harbour Remedial Action Plan. Environ. Monit. Assess. 113, 227–243.
Health Canada, 2005. It's Your Health: PCBs [WWW Document]. URL www.hc-sc.gc.ca/hl-vs/iyh-vsv/environ/pcb-bpc-eng.php (accessed 6.18.13).
Holm, E., Mandrak, N.E., Burridge, M.E., 2009. The ROM Field Guide to Freshwater Fishes of Ontario. Royal Ontario Museum, Ottawa, Ontario, Canada.
International Joint Commission, 2012. Great Lakes Water Quality Agreement [WWW Document]. URL http://www.ijc.org/en_/Great_Lakes_Water_Quality (accessed 12.3.13).
Labencki, T., 2008. An assessment of polychlorinated biphenyls (PCBs) in the Hamilton Harbour Area of Concern (AOC) in support of the Beneficial Use Impairment (BUI): Restrictions on Fish and Wildlife Consumption.
Morrison, H.A., Gobas, F.A.P.C., Lazar, R., Whittle, D.M., Haffner, G.D., 1998. Projected changes to the trophodynamics of PCBs in the western Lake Erie ecosystem attributed to the presence of zebra mussels (Dreissena polymorpha). Environ. Sci. Technol. 32, 3862–3867.
Morrison, H.A., Whittle, D.M., Haffner, G.D., 2002. A comparion of transport and fate of polychlorinated biphenyl congeners in three Great Lakes food webs. Environ. Toxicol. Chem. 21, 683–692.
Neff, M.R., Robinson, J.M., Bhavsar, S.P., 2013. Assessment of fish mercury levels in the upper St. Lawrence River, Canada. J. Great Lakes Res. 39, 336–343.
Ontario Ministry of the Environment, 2005. The determination of polychlorinated biphenyls (PCBs), organochlorines (OCs) and chlorobenzenes (CBs) in fish, clams and mussels by gas liquid chromatography-electron capture detection (GLC-EC). Labratory Services Branch Method PFAOC-E3136. Toronto, Ontario, Canada.
Ontario Ministry of the Environment, 2006. The determination of mercury in biomaterials by cold vapour-flameless atomic absorption spectroscopy (CV-FAAS), Method HGBIO-E3057. Toronto, Ontario, Canada.
Ontario Ministry of the Environment, 2012. The determination of polychlorinated dibenzo-p-dioxins, polychlorinated dibenxofurans, dioxin-like polychlorinated biphenyls (DLPCBs), polychlorinated napthalenes (PCNs) and polybrominated diphenyl ethers (PBDEs) in biota samples by automated sample extra. Toronto, Ontario, Canada.
Ontario Ministry of the Environment, 2013. Guide to Eating Ontario Sport Fish, 27th ed. Queen's Printer for Ontario, Toronto, Ontario, Canada.
Ontario Ministry of the Environment, 2014. The determination of perfluoroalkyl acids (PFAAs) in biota saples by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Laboratory Services Branch Method E3507. Toronto, Ontario, Canada.
R Core Team, 2013. R: A language and environment for statistical computing.
Salmi, T., Anttila, P., Ruoho-Airola, T., Amnell, T., 2002. Detecting trends of annual values of atmospheric pollutants by the Mann-Kendall test and Sen's slope estimates - the Excel template application MAKESENS.
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