drinking water, wastewater & water quality
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Drinking Water, Wastewater & Water Quality. Special emphasis on NC streams. http://www.charlestonwater.com/water_trt_process.htm. Indicators of Water Quality -NC Streams. 1-Chemical Ammonia Nitrates/NitritesAgricultural & Domestic Sources Phosphorus - PowerPoint PPT PresentationTRANSCRIPT
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Drinking Water, Wastewater & Water Quality
Special emphasis on NC streams
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http://www.charlestonwater.com/water_trt_process.htm
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Indicators of Water Quality -NC Streams
1-Chemical• Ammonia•Nitrates/Nitrites Agricultural & Domestic Sources• Phosphorus• pH of natural waters = 5.6, lower means impairment• Dissolved O2-cold temps mean high D.O.• Conductivity•Metals; Arsenic, Mercury, Iron, Copper, Zinc, Lead. Some
are from natural mineral deposits.
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2-Physical• Stream Velocity• Runs• Riffles• Pools
• Turbidity• Total Dissolved Solids
3-Biotic Index•High Diversity = Good Water Quality• Low Diversity (lots of one or two organisms) means
poor water quality
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Benthic Macroinvertebrates
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Non-point source pollution•Sedimentation•Agricultural sites•Animal feedlots•Croplands
•Stormwater runoff•Contains oil, gas, pesticides, salt
•Metals-Even small amounts can be harmful• EPA limit for Arsenic = 10 parts per billion (ppb)
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Stormwater Runoff
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Sedimentation in Streams