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Water Pollution

Water Pollution. Nashua River. Types of Pollution Sewage. Nutrients Sediments Disease Causing Agents Inorganic Chemicals Organic Compounds Radioactive Substances Thermal Pollution. Eutrophication. Vocabulary and Concepts: Nutrient Enrichment Natural and Cultural Oxygen Sag Curve

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Water Pollution

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  1. Water Pollution

  2. Nashua River

  3. Types of Pollution Sewage • Nutrients • Sediments • Disease Causing Agents • Inorganic Chemicals • Organic Compounds • Radioactive Substances • Thermal Pollution

  4. Eutrophication Vocabulary and Concepts: Nutrient Enrichment Natural and Cultural Oxygen Sag Curve Dissolved Oxygen Biological Oxygen Demand Hypoxia Dead Zones Causes

  5. Controlling Water Pollution • Identifying Sources • Point and Nonpoint Sources • Treatment Technologies • Point Source • Eliminate Pollutants from Waste Stream • RCRA and other laws • Individual Wastewater Treatment • Municipal Wastewater Treatment • Nonpoint Source • Agriculture • Mining and Forestry • Urban Runoff

  6. Individual Sewage Disposal Systems (ISDS) Requires Sufficient Area for treatment Management of Wastes Septic Tank Settling of solids Requires Pumping Leaching Field or Drainfield

  7. Municipal Wastewater Treatment

  8. Municipal Sewage Treatment • Primary • Secondary • Tertiary or Advanced

  9. Packaged Waste Water Treatment

  10. Nonpoint Sources • Urban Runoff • Agriculture • Mining (largely controlled by SMCRA) • Forestry

  11. Urban Runoff • Urbanization increases the variety and amount of pollutants carried into our nation's waters. In urban and suburban areas, much of the land surface is covered by buildings, pavement and compacted landscapes with impaired drainage. These surfaces do not allow rain and snowmelt to soak into the ground which greatly increases the volume and velocity of stormwater runoff. In addition to these habitat-destroying impacts, pollutants from urban runoff include: • Sediment • Oil, grease and toxic chemicals from motor vehicles • Pesticides and nutrients from lawns and gardens • Viruses, bacteria and nutrients from pet waste and failing septic systems • Road salts • Heavy metals from roof shingles, motor vehicles and other sources • Thermal pollution from dark impervious surfaces such as streets and rooftops http://www.epa.gov/owow_keep/NPS/urban.html

  12. Urban Runoff Control Technologies Retention Ponds Catch Basins Education

  13. Agriculture Buffer strips Erosion Control Integrated Pest Management (IPM)

  14. Forestry and Mining

  15. Clean Water Act • Criteria • Point Sources • NPDES Permits • Funding for WWT • Protection of Wetlands • Section 404 • Research and Control of non-point sources

  16. Safe Drinking Water Act • 1974 (amended 1986, 1996, • Requires EPA to determine Maximum Contaminant Level

  17. International Water Pollution Issues • Access to clean water • Reduction of contamination • Competition for scarce resources http://video.pbs.org/video/2203388630

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