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Hands-On Water Quality Assessment For Everyone!

Hands-On Water Quality Assessment For Everyone!. By Dr. Birgit Hagedorn University of Alaska Anchorage & Edda Mutter University of Alaska Fairbanks. Water Quality. Different levels: Drinking - Potable Water None-Potable Water Recreational Water Environmental Protection Agency (EPA)

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Hands-On Water Quality Assessment For Everyone!

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  1. Hands-On Water Quality Assessment For Everyone! By Dr. Birgit Hagedorn University of Alaska Anchorage & Edda Mutter University of Alaska Fairbanks

  2. Water Quality • Different levels: • Drinking - Potable Water • None-Potable Water • Recreational Water Environmental Protection Agency (EPA) • Drinking Water Standards

  3. Water Monitoring • Seasonal Changes • Snowmelt • Droughts • Summer Rain Events • Freeze-up

  4. Water Sources • Surface Water • Stream • Lakes • Groundwater • Rain & Snowmelt Water

  5. Water Characteristics • Physical, Chemical, and Biological • Natural and Anthropogenic

  6. Physical Characteristics • Temperature • Chemical and biological Implication • Odor-Taste • Particulate and Sediment Load • Glacial & Sediment-Rich Water • Burn and Road Dust • Surface and Rainwater • Filtration

  7. Chemical Characteristics • pH • Salt Content • Oxygen Concentration • Alkalinity - Hardness • Within specific range for drinking water standard • Implication of other chemical and biological processes

  8. Biological Characteristics • Biological Oxygen Demand • Microorganisms such as bacteria • Plants and Algae • Macroorganisms such as larvae, fish and clams

  9. Contaminants • Natural Contaminants - Geology Metals • Anthropogenic • Mining • Solid Waste • Honey Bucket Waste

  10. pH - Values • Tells you how acidic or basic water is • Range 0-14 pH • Acidic water < pH 7 • Basic water > pH 7 • Natural water range of pH is 5-8 • pH 5.5 common for rainwater • ~ pH 8 in limestone water • Drinking water range of pH is 6 to 8.5

  11. Alkalinity • Ability of a solution to neutralize acids • Measurements • Total Alkalinity (EPA regulated in terms of total dissolved solids 500 mg/L) • Phosphorus • Nitrate

  12. Alaska (DEC) Water Quality Standards • Iron 0.3 mg/L • pH 6.0-8.5 • Temperature < than 15 degrees Celsius • Total Dissolved Solids 500 mg/L • Chloride 250 mg/L • Dissolved Oxygen (D.O.) > than 7 mg/L • Ammonia 30 mg/L • Copper 1.0 mg/L

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