Abstract
Many jurisdictions around the globe have well-developed regulatory frameworks for the derivation and implementation of water quality guidelines (WQGs) or their equivalent (e.g. environmental quality standards, criteria, objectives or limits). However, a great many more still do not have such frameworks and are looking to introduce practical methods to manage chemical exposures in aquatic ecosystems. There is a potential opportunity for learning and sharing of data and information between experts from different jurisdictions in order to deliver efficient and effective methods to manage potential aquatic risks, including the considerable reduction in the need for aquatic toxicity testing and the rapid identification of common challenges. This paper reports the outputs of an international workshop with representatives from 14 countries held in Hong Kong in December 2011. The aim of the workshop and this paper was to identify ‘good practice’ in the development of WQGs to deliver to a range of environmental management goals. However, it is important to broaden this consideration to cover often overlooked facets of implementable WQGs, such as demonstrable field validation (i.e. does the WQG protect what it is supposed to?), fit for purpose of monitoring frameworks (often an on-going cost) and finally how are these monitoring data used to support management decisions in a manner that is transparent and understandable to stakeholders. It is clear that regulators and the regulated community have numerous pressures and constraints on their resources. Therefore, the final section of this paper addresses potential areas of collaboration and harmonisation. Such approaches could deliver a consistent foundation from which to assess potential chemical aquatic risks, including, for example, the adoption of bioavailability-based approaches for metals, whilst reducing administrative and technical burdens in jurisdictions.
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Acknowledgments
This work and the EQSPAE-2011 Conference are largely supported by Environment and Conservation Fund of the Government of the Hong Kong Special Administrative Region of the People’s Republic of China (ECF Project 5/2011 to KMY Leung), and partially supported by the State Key Laboratory in Marine Pollution (based at City University of Hong Kong), and School of Biological Sciences of the University of Hong Kong (HKU). The authors specially thank the following workshop participants, who had joined the discussion and shared their valuable views on the scientific derivation and application of WQGs, included Put Ang, Tae-Seob Choi, Kevin K. Y. Ho, Ryan H. L. Ip, Edward T. C. Lau, Hai-Yan Li, Myung-Sook Jung, Jing-Li Mu, Sunny Sun, Greta Tam, Thiyagarajan Vengatesen, Zhen Wang, Feng-Chang Wu, Elvis G. B. Xu, Jie Xu, Andy X. L. Yi and Jian-Gang Zhu. The authors are also thankful to the staff of HKU, in particular, Helen Leung and Janet Chan for their great assistance for making the conference and workshop a great success. Apart from the first and the last authors, the order of authorships follows an alphabetical order.
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Merrington, G., An, YJ., Grist, E.P.M. et al. Water quality guidelines for chemicals: learning lessons to deliver meaningful environmental metrics. Environ Sci Pollut Res 21, 6–16 (2014). https://doi.org/10.1007/s11356-013-1732-8
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DOI: https://doi.org/10.1007/s11356-013-1732-8