Lead in drinking water Flashcards
where did drinkign water come for flint before 2014
Lake Huron
Where is new supply now
Flint River
where is new supply treated
flint water plant
main aspects of treatment of drinking water at flint
sediment particles removed by adding a coagulant, particles
sink to bottom on tanks, filtered through sand and then carbon,
fluorine and chlorine added
what bacteria was found in flint after switch
E.coli
how was bacteria killed
adding more chlorine
maximum contaminant level goal for lead in water
is 0
what does lead trick body into thinking it is
calcium, mineral for communication of neurons
Volume loss in the brain from lead poisoning is in which lobe
Frontal lobe
decision-making, focus, planning, judgement
what part of the drinking water supply system in Flint were potential sources of lead
- service lines made of Pb
- within a house: lead in brass (faucets and valves),
lead in galvanized iron, lead solder in household pipes
what chemicals did Flint not add to the water?
- corrosion control
- lead to corrosion of iron water mains, and break down of protective scale on lead service lines
outbreak of Legionnaire’s disease in Flint, relation to drinking water supply
- no corrosion control, so iron leached into the water in the water mains and reacted with chlorine
- not enough chlorine left to kill legionnaire’s bacteria
how long did Flint people drink contaminated water for
18 months
why was lead used instead of iron in pipes
- resistant to corrosion
- easy to shape
is lead found in our water source in calgary
no
- our lead pipes have been replaced
