2010 Progress Report - International Joint Commission

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Progress Report 2010 Monitoring trends in these indicators make it possible to determine whether conditions in acid-sensitive lakes and streams are improving and heading towards recovery or whether conditions are degrading. Movement toward recovery of an aquatic ecosystem is indicated by increases in ANC levels and decreases in sulphate and nitrate concentrations. Table 4 presents the sulphate, nitrate, and ANC trends (μeq/L/yr) represented by the long-term monitoring sites sampled in lakes and streams from 1990 to 2007 for four acid-sensitive regions of the eastern United States. These regional trends were calculated using data from all the sites that were located within the region and had a complete data record for the time period considered. Trends are statistically signifi cant at the 95 percent confi dence interval (p
Declines in sulphate deposition levels are the likely result for many of the improving trends in ANC, but ANC levels still lag declining sulphate concentrations in many of the monitoring sites. From 1990 to 2007, monitoring sites that showed increasing ANC levels (statistically signifi cant improving trend) were in the Figure 34. Trends in Lake and Stream Water Chemistry at LTM Sites, 1990–2007 – Sulphate Ion Concentrations Adirondacks and Catskills (50% of sites). Only a few sites (12% of sites) in New England had statistically signifi cant increasing trends in ANC. Streams in the Appalachian Plateau and Blue Ridge showed few statistically signifi cant trends in ANC (Figure 36). Figure 35. Trends in Lake and Stream Water Chemistry at LTM Sites, 1990–2007 – Nitrate Ion Concentrations Scientific and Technical Cooperation and Research Source: US EPA 2010 Source: US EPA 2010 Figure 36. Trends in Lake and Stream Water Chemistry at LTM Sites, 1990–2007 – ANC Levels Source: US EPA 2010 65
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Canada • United States Air Qualit
Page 3 and 4:
TABLE OF CONTENTS INTRODUCTION . .
Page 5 and 6:
LIST OF FIGURES AND TABLES FIGURES
Page 7 and 8:
Progress Report 2010 Introduction B
Page 9 and 10:
3 Progress Report 2010
Page 11 and 12:
Figure 1. Total Canadian Emissions
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y power plants and other sources (s
Page 15 and 16:
Acid Deposition Monitoring, Modelli
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y 2007 the regions receiving greate
Page 19 and 20: The United States has various progr
Page 21 and 22: Following guidelines approved by th
Page 23 and 24: The Off-Road Compression-Ignition E
Page 25 and 26: Regulation 194/05 (Industry Emissio
Page 27 and 28: The NO x Budget Trading Program (NB
Page 29 and 30: Figure 13. Affected Units in CAIR N
Page 31 and 32: In addition, the EPA had previously
Page 33 and 34: The proposed reductions in air poll
Page 35 and 36: The compilation of the comprehensiv
Page 37 and 38: Figure 18. U.S. NO x Emission Trend
Page 39 and 40: Commitments Figures 20 and 21 show
Page 41 and 42: Ozone Concentration (ppb) 100 90 80
Page 43 and 44: Figure 26. Network of Monitoring Si
Page 45 and 46: (86% of electric utility emissions)
Page 47 and 48: emissions have also been successful
Page 49 and 50: The Transportation and Air Quality
Page 51 and 52: • VOC emissions are the most dive
Page 53 and 54: In the United States, there is an o
Page 55 and 56: As of 2008, over 300 NAPS air monit
Page 57 and 58: Table 3 (continued) MAJOR ROUTINE O
Page 59 and 60: Health Effects CANADA Health Canada
Page 61 and 62: Canadian Health and Exposure Tools
Page 63 and 64: such as premature mortality, hospit
Page 65 and 66: information and the risks posed by
Page 67 and 68: Ecological Effects Aquatic Effects
Page 69: Reduction in surface water calcium
Page 73 and 74: etained within their catchments (la
Page 75 and 76: Environment (CDPHE) and the EPA to
Page 77 and 78: Figure 40. Lake and Stream Exceedan
Page 79 and 80: Figure 44. Ammonia Monitoring Netwo
Page 81 and 82: Figure 46. Major Atmospheric Transp
Page 83 and 84: APPENDIX A Canada-U.S. Air Quality
Page 85 and 86: APPENDIX B Appendix B: List of Acro
Page 87 and 88: PCB polychlorinated biphenyl SLAMS
Page 89 and 90: Notes Progress Report 2010 83
Page 91: To obtain additional information, p
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2010 Progress Report - International Joint Commission

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