Download
1 / 14
140 likes | 295 Vues
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/Nitrites Agricultural & Domestic Sources Phosphorus
E N D
Drinking Water, Wastewater & Water Quality Special emphasis on NC streams
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.
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
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)
