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Do You Know What You are Drinking?

Do You Know What You are Drinking?. Kelly Mannion. Background Information. Bacteria : dangerous microbes found in the environment Lead : a metal found in natural deposits Pesticides : deadly chemicals used to kill harmful elements in crops.

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Do You Know What You are Drinking?

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  1. Do You Know What You are Drinking? Kelly Mannion

  2. Background Information • Bacteria: dangerous microbes found in the environment • Lead: a metal found in natural deposits • Pesticides: deadly chemicals used to kill harmful elements in crops. • Nitrates and Nitrite: harmful pollutants resulting from animal or human wastes coming in contact with water. • pH: the measure of acidity • Hardness: caused by magnesium and calcium compounds • Chlorine: a drinking water disinfectant

  3. Question What is the quality of ice in local convenient stores?

  4. Hypothesis There will be variances in the quality of ice in local convenient stores depending on the results of the tests performed.

  5. Variables • Independent: the source of the ice • Dependent: the water quality of the ice • Constants: the collection process, the container the ice is stored in, the testing methodology, the time between collection and testing, and the temperature of the water when tested • Control: the amount of water taken as samples, and the testing procedure

  6. Procedure I • Collect ice from local convenient stores (label the cups accordingly) • Allow all ice to melt completely • Bacteria test: fill bacteria test vial with water and shake for 20 seconds. Let stand for 48 hours then observe the results. • Lead/Pesticide test: place two dropper-fuls of the water sample into the test vial, swirl, and place both test strips into the test vial. Let stand for 10 minutes then observe. • Nitrate/Nitrite test: immerse testing pads into the water sample for 2 seconds, then observe results after 1 minute

  7. Procedure II • pH/Hardness/Chlorine test: immerse testing pad into water sample and remove immediately. Hold the strip level for 15 seconds, then observe results. • Repeat tests for all water samples.

  8. Data I Pesticide Test: Lead Test:

  9. Data II Nitrate/Nitrite Test: Nitrite Test:

  10. Data III pH Test: Hardness Test:

  11. Data IV Chlorine Test: Bacteria Test:

  12. Limitations • Possible cross contamination • Exposed to open air • Only one sample was tested from each ice location

  13. Conclusion • The ice collected from local convenient stores is clean and free of harmful contaminants • All ice was at a healthy level for bacteria, lead, pesticides, nitrates/nitrites, pH, harness, and chlorine • The results rejected the hypothesis in the sense that there was no variation between the different ice sources. All ice sources were clean.

  14. Works Cited • “Get Ahead of Lead! Get the Lead Out of Drinking Water.” Department of Health. New York State, Jan. 2009. Web. 3 Dec. 2010. <http://www.health.state.ny.us/‌publications/‌2508/>. • Harrison, Steve. “Health Effects of Chlorine in Drinking Water.” Pure Earth Technologies Inc. Pure Earth Technologies, 2 Feb. 2000. Web. 3 Dec. 2010. <http://www.pure-earth.com/‌chlorine.html>. • Hart, Anna. “Science Fair Project on Testing Drinking Water.” Ezine Articles. N.p., 2 Mar. 2007. Web. 3 Dec. 2010. • New York State Department of Health. “Coliform Bacteria in Drinking Water Supplies.” Department of Health. New York State, Mar. 2005. Web. 3 Dec. 2010. <http://www.health.ny.gov/‌environmental/‌water/‌drinking/‌coliform_bacteria.htm>. • Washington State Department of Health. “Nitrate in Drinking Water.” Division of Enviornmental Health Office of Drinking Water. Washington State Department of Health, 28 Sept. 2010. Web. 3 Dec. 2010. <http://www.doh.wa.gov/‌ehp/‌dw/‌Programs/‌nitrate.htm>. • WaterSafe. “WaterSafe Science Project Kit.” N.d. HTML file.

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