Drinking Water, Wastewater & Water Quality Special emphasis on NC streams.

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Presentation transcript:

Drinking Water, Wastewater & Water Quality Special emphasis on NC streams

Indicators of Water Quality -NC Streams 1-Chemical Ammonia Nitrates/NitritesAgricultural & Domestic Sources Phosphorus pH of natural waters = 5.6, lower means impairment Dissolved O 2 -cold temps mean high D.O. Conductivity Metals; Arsenic, Mercury, Iron, Copper, Zinc, Lead. Some are from natural mineral deposits.

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

Benthic Macroinvertebrates

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)

Stormwater Runoff

Sedimentation in Streams