Managing CECs and deriving WQS for major Korean rivers
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The monitoring program has a goal of managing contaminants of emerging concern and deriving water quality standards from 2007-present with a budget of $11 million. It monitors 375 substances nationwide at 115 points each season, focusing on substances like metals, volatile organic compounds, pharmaceuticals, pesticides, and more. Standards have been derived for 1,4-Dioxane, Formaldehyde, and Hexachlorobenzene based on a process that selects candidate substances, monitors them nationwide, performs risk assessments, and derives standards while building a database and establishing a monitoring system. Issues around aligning water quality standards with drinking water standards and balancing scientific and stakeholder criteria remain.
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Managing CECs and deriving WQS for major Korean rivers
- 2. An outline of monitoring program Goal: Managing CECs and deriving WQS Duration: 2007- Budget: $ 11 million The number of substances monitored: 375 substances Derived pollutants as WQS • 1,4-Dioxane (2013) • Formaldehyde (2014) • Hexachlorobenzene (2015) NIER
- 3. Han river Nakdong river Geum river Yeongsan river Water quality monitoring Monitoring system Organization Duration Site 4 Water Environmental Research Centers 2007 ~ (by season) Focused on 115 points nationwide NIER MetalsVOCsPharmaceuticals PPCP Pesticides Monitoring substances ETCs 19 % 10 % 38 % 24 % 7 % 2 %
- 4. The number of candidate substances monitored 98 130 195 36 76 29 14 12 25 14 1612 35 37 30 34 31 23 15 25 14 16 0 50 100 150 200 250 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 Thenumberofsubstances Budget 1 Budget 2 NIER
- 5. 1st derivation of WQS for the protection of human health (2012) 275 substances 33 substances 13 substances 3 substances Detected or not Detection frequency (at least 4 times for 2 years) PEC-PNEC Ratio > 1.0 Selection of substances for criteria (2007-2011) Comparing derived criteria with drinking water standards or guideline in Korea and other countries. 1,4–Dioxane(0.05mg/L, Japan), Formaldehyde (0.5mg/L,Australia),Hexachlorobenzene (0.04 ug/L, NewYork) NIER
- 6. 1st year 2nd year 3rd year 4th year 5th year Selecting candidate substances Monitoring nationwide Risk assessment Derivation of standard Management improvement plan Building a database for results of monitoring Establishingamonitoringsystemwhichenablesregularmonitoring Legalizing a process to set WQS NIER
- 7. Thorny issues When we set water quality standard, how can we cope with drinking water standards? How can we narrow down the gap between criteria derived from scientific evidence and criteria taken into account stakeholders? NIER
- 8. Thank you for your attention. 경청해 주셔서 감사합니다. NIER