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Keoleian Associate Research Scientist, School of Natural Resources and Environment Co-Director , Center for Sustainable Systems University of MichiganContents: 2 Contents Air Pollution Impacts [slide 4] Sources of Air Toxics [slide 5-6] Criteria Air Pollutants [slide 7-9] Trends in National Emissions of Criteria Pollutants [slide 10] Comparison of 1970 and 1999 Emissions [slide 11-12] Comparison of Growth in Population, VMT, GNP with Emissions [slide 13] Percent Change in Air Quality [slide 14] Number of People Living in Nonattainment Areas[slide 15]Slide 3: 3 Trends in Sulfur Dioxide Emissions [slides 16] Water Pollution [slides 17- 18] Sources of Point and Nonpoint Source Pollution [slide 19-22] Water Quality of Assessed Rivers, Lakes and Estuaries [slide 23] Pollutants and Sources Causing Impairments of Assessed Rivers, Lakes and Estuaries [slide 24] Toxic Release Inventory [slide 25-28] TRI data [slides 29-31] Industrial Waste [slides 32-33] Municipal Solid Waste [slide 34-35] Additional Resources [slide 36-37]Air pollutant impacts: 4 Air pollutant impacts Greenhouse effect Ozone depletion acidification smog formation eutrophication human health ecosystem healthSlide 5: 5Slide 6: 6Criteria Air Pollutants: 7 Criteria Air Pollutants EPA uses six "criteria pollutants" as indicators of air quality EPA established for each of them a maximum concentration above which adverse effects on human health may occur.Criteria air pollutants: 8 Criteria air pollutants Nitrogen Dioxide: NO2 brownish gas irritates the respiratory system originates from combustion (N2 in air is oxidized); NOx sum of NO, NO2, other oxides of N Ozone: ground level O3 primary constituent of urban smog reaction of VOC + NOx in presence of heat +sun light Carbon monoxide: CO reduces bloods ability to carry O2 product of incomplete combustionSlide 9: 9 Lead: Pb cause learning disabilities in children , toxic to liver, kidney, blood forming organs tetraethyl lead – anti knock agent in gasoline leaded gasoline has been phased out Particulate Matter: PM10 (PM 2.5) respiratory disorders Sulfur Dioxide: SO2 formed when fuel (coal, oil) containing S is burned and metal smelting precursor to acid rain along with NOxSlide 10: 10Comparison of 1970 and 1999 Emissions: 11 Comparison of 1970 and 1999 EmissionsSlide 12: 12Slide 13: 13Slide 14: 14Number of People Living in Counties with Air Quality Concentrations Above the Level of the NAAQS in 1999 : 15 Number of People Living in Counties with Air Quality Concentrations Above the Level of the NAAQS in 1999Trends in Sulfur Dioxide Emissions Following Implementation of Phase I of the Acid Rain Program: Total State-level Utility SO2 (1980, 1990, 1999): 16 Trends in Sulfur Dioxide Emissions Following Implementation of Phase I of the Acid Rain Program: Total State-level Utility SO2 (1980, 1990, 1999)Water Pollution : 17 Water Pollution Based on current water quality standards, over 70 percent of our rivers, 68 percent of our estuaries and 60 percent of our lakes now meet legislatively mandated goals. Some of the risks include pollutant runoff from agricultural lands stormwater flows from cities About 40,000 times each year, sanitary sewers overflow and release raw sewage to streets and waterbodies.Water Pollution: 18 Water Pollution seepage into ground water from nonpoint sources the loss of habitats such as wetlands. we cannot always eat what we catch because fish flesh is contaminated by the remaining discharges and sources of toxic substances. Microbial contamination of drinking water still presents problems in many communities.Pollution Sources: 19 Pollution Sources Point sources are direct discharges to a single point; examples include discharges from sewage treatment plants, injection wells,and some industrial sources.Pollution Sources: 20 Pollution Sources Non-point sources are diffused across a broad area and their contamination cannot be traced to a single discharge point. Examples include runoff of excess fertilizers, herbicides, and insecticides from agricultural lands and residential areas; oil, grease, and toxic chemicals from urban runoff and energy production; and sediment from improperly managed construction sites, crop and forest lands, and eroding stream banks.Slide 21: 21Slide 22: 22Slide 23: 23Slide 24: 24US EPA Toxic Release Inventory: 25 US EPA Toxic Release Inventory Certain industrial facilities are mandated to annually report to US EPA specified toxic chemicals mandated under Emergency Planning & Community Right-to-Know Act (EPCRA) in 1986 and enacted under Superfund Amendments & Reauthorization Act in 1987 response to Bhopal (1984) and other accidentsWho reports: 26 Who reports Specified SIC (Standard Industrial Classification) codes, Have 10 or more equivalent full-time employees, and Exceed established thresholds for any chemical on the TRI list 25,000 lb/yr if chemical is manufactured and/or processed 10,000 lb/yr if chemical is otherwise usedSlide 27: 27Limitations of TRI: 28 Limitations of TRI 1) TRI does not cover all toxic chemicals that have the potential to adversely affect human health or the environment. 2) TRI does not require reporting from many major sources of pollution releases. 3) TRI does not require companies to report the quantities of toxic chemicals used or the amounts that remain in products. 4) TRI does not provide information about the exposures people may experience as a consequence of chemical use.1998 TRI Data: 29 1998 TRI Data On-site releases 6.9 billion pounds Off-site releases 0.4 billion pounds Transfers off-site for further waste management 3.0 billion pounds Total TRI chemicals in waste 30.5 billion poundsSlide 30: 30Slide 31: 31Industrial Waste: 32 Industrial Waste Industrial waste is process waste associated with manufacturing. This waste usually is not classified as either municipal waste or hazardous waste by federal or state laws. Regulatory programs for managing industrial waste vary widely among state, tribal, and some local governments. Each year, industrial facilities generate and manage 7.6 billion tons of nonhazardous industrial waste in land application units.Slide 33: 33Municipal Solid Waste: 34 Municipal Solid Waste EPA definition includes wastes such as durable goods, nondurable goods, containers and packaging, food scraps, yard trimmings, and miscellaneous inorganic wastes from residential, commercial, institutional, and industrial sources. Examples of waste from these categories include appliances, automobile tires, newspapers, clothing, boxes, disposable tableware, office and classroom paper, wood pallets, and cafeteria wastes.Slide 35: 35Additional Resources: 36 Additional Resources Air pollution US EPA http://www.epa.gov/oar/oaqps/ http://www.epa.gov/air/ Water pollution US EPA http://www.epa.gov/water/Slide 37: 37 Toxics Release Inventory US EPA http://www.epa.gov/tri/ Solid waste US EPA http://www.epa.gov/solidwaste/ You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.