National Water Quality Assessment Program (NAWQA) National Liaison Committee Meetings of the NAWQA National Liaison Committee held in FY 2002-2003 March 15, 2002 - Focus on Wastewater Contaminants Detections: most chemicals in common use were detected Health and environmental effects Significance of low level contamination findings November 14, 2002 - Focus on Mercury Mercury deposition and methylation Health effects of Mercury NAWQA Topical Study of Mercury Participants identified need for additional information on mercury: Capabilities and costs of mercury emission control technology Specifics of legislative and regulatory options March 14, 2003 - Focus on Nutrient Enrichment EPA's Criteria for Mercury NAWQA's Topical Study on Mercury November 21, 2003 - Focus on Atmospheric Deposition Nitrogen Sulphates Home