powerpoint water supply
TRANSCRIPT
How much water do we really have to drink?
By Luis Vazquez
The Water’s Fine…
There is roughly 332.5 million cubic miles of water on earth….
The USGS Water Science School 5/23/2013
96% is saltwaterOf the remaining 4%:
• 30% is in the ground.
• Which leaves us with about 300 cubic miles of fresh surface water.
• 68% is locked in ice and glaciers.
however
• That’s approximately 1/10000th of one percent of fresh water is for our everyday use.
How many water systems are there in the U.S.? http://water.epa.gov/infrastructure/drinkingwater/pws/factoids.cfm
As of 2010, the EPA listed 155K public water systems in the U.S.
Community Water System (CWS): A public water system that supplies water to the same population year-round.
Non-Transient Non-Community Water System (NTNCWS): A public water system that regularly supplies water to at least 25 of the same people at least six months per year, but not year-round. Some examples are schools, factories, office buildings, and hospitals which have their own water systems.
Transient Non-Community Water System (TNCWS): A public water system that provides water in a place such as a gas station or campground where people do not remain for long periods of time.
52,873 CWS served 300.2 million people 19,400 NTNCWS served 6.4 million people 87,672 TNCWS served 13.1 million people
What could be in my water?
Heavy MetalsHuman & Animal
Waste
Household products & Fertilizers
How is my water made safe to drink?Coagulation & Flocculation using cationic
polymer and alum to make tiny particles in the water stick together to form larger particles, which can be better trapped in filters.
Direct Filtration – This removes particles from the water using a charcoal and sand filter.
Disinfection with Chlorine to kill bacteria and other microorganisms.
Water TriviaCan you guess how much water was treated for
Worcester County in 2012?A. 840,000 gallonsB. 8,400,000 gallonsC. 8,400,000,000 gallons
That’s 2.3 million gallons of water per day for only 806,163 people!
http://www.worcesterma.gov/uploads/ee/65/ee652dd4088a6d00f23c3756f13d7d87/water-quality-report.pdf
What can I do to help?Use more energy efficient, low-water, appliances
such as dishwashers or washing machines.
Use low-water toilets and low-flow showerheads to save on the amount of water that goes down the drain.
Water gardens only when needed and use more drought resistant grass seeds.
Never dump hazardous materials (motor oil, leftover paint) down the drain or in an open sewer.
In conclusion…Do not take your water for granted.
Make sure you know what’s in your water.
Do your part to conserve.
Thank You