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Get out Obj #9 &10 for a stamp Review for today’s quiz Obj #1-10 Pass back the permission slip!. Where does your water come from?. Houston Water sources:. Lake Livingston (806 MGD) Lake Conroe (60 MGD) Lake Houston (150 MGD) Evangeline aquifer.
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Get out Obj #9 &10 for a stamp • Review for today’s quiz Obj #1-10 • Pass back the permission slip!
Houston Water sources: Lake Livingston (806 MGD) Lake Conroe (60 MGD) Lake Houston (150 MGD) Evangeline aquifer
1. Screening2. Coagulationalum3.Sedimentation4. Filtration5. disinfection:chlorineUV raysozone
Check out the 2012 water report • Identify: • Five radioactive particles. • One fat soluble herbicide • One heavy metal which causes brain damage • Three organic chemicals that probably come from petroleum refineries • How many of these contaminants were higher than the Maximum Containment Level? (MCL)
Overdraft – taking more water OUT of an aquifer than is recharging IN to the aquifer • (What would happen to your bank account if you did this?) Consequences of using our ground water
Houston is switching to just surface water to protect the city from further subsidence. • Overdraft leads to subsidence
What is the role of alum in water treatment? • What materials is the filtration system made out of ? • Why is chlorine added to our drinking water? • Why is fluoride added to our drinking water? • How are subsidence and overdraft related? • Why does it matter that our drinking water supplies are downstream of Dallas? Check for understanding