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Nitrates in the Water Around Us. Katrina Seykora Grade 9. Problem. How much nitrate is found in local creeks? Does location affect the amount of nitrate found? How does this impact our health?. Research. Nitrate-compound that is formed naturally when nitrogen combines with oxygen or ozone

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nitrates in the water around us

Nitrates in the Water Around Us

Katrina Seykora

Grade 9

problem
Problem
  • How much nitrate is found in local creeks?
  • Does location affect the amount of nitrate found?
  • How does this impact our health?
research
Research
  • Nitrate-compound that is formed naturally when nitrogen combines with oxygen or ozone
  • If large amount is ingested
    • Decreases the ability of the blood to carry oxygen
    • Causes methemoglobinemia“blue baby syndrome”
      • Fatalities are rare
  • Toxicity level-U.S. Public Health Service Drinking Water Safety Standard for nitrate levels is 40 ppm
research1
Research
  • Crum Creek flows into the Springton Reservoir (24 miles)-residential area
    • Trolley lines (SEPTA)
    • 700,000 gallons per day
  • Darby Creek empties into Delaware River(26.1 miles)-residential area
    • Helicopter factory, western border of Haverford Township, 2 miles from Philadelphia International Airport
  • Ridley Creek empties into Delaware River (23 miles)-flows into a preserved area
    • Ridley Creek State Park, Tyler Arboretum
    • 2.7 million gallons per day
hypothesis
Hypothesis
  • If a creek is located near a reservoir, then the amount of nitrates found there will be lower because of the location and contribution to drinking water.
materials
Materials
  • 8 30 mL containers
  • Distilled water
  • ChemKit nitrate test kit (cadmium)
procedure
Procedure
  • 1 .traveled to the following creeks: Darby Creek, Crum Creek, and Ridley Creek
  • 2. sampled 30 mL of creek water from each creek
  • 3. acquired 30 mL of distilled water (control)
  • 4.used the nitrate test kit to find the amount of nitrate contained in the samples and distilled water (3 trials for each sample)
  • 5. observed the difference in the amounts of nitrates found in the water based on the location of where the water sample was taken
variables
Variables
  • Independent: creeks, development in area
  • Dependent: concentration of nitrates
  • Control: distilled water
  • Constants: test tubes, nitrate kit, weather, day
slide9
Data

Water Source

conclusion
Conclusion
  • Not harmful
  • No specific trend in data based on location
  • Consistent with the amount of development in the surrounding areas
  • Location was not a factor
    • Sources of error
      • Not all of the cadmium powder was emptied into container
      • Did not shake solution for full 3 min.
    • Extending the experiment
      • test bodies of water from primarily urban and rural areas
thank you
Thank You!
  • Questions?
  • http://www.ext.colostate.edu/pubs/crops/00517.html
  • http://www.idph.state.il.us/envhealth/factsheets/NitrateFS.htm
  • http://water.epa.gov/drink/contaminants/basicinformation/nitrate.cfm
  • http://www.cdc.gov/healthywater/drinking/private/wells/disease/nitrate.html
  • http://www.bfhd.wa.gov/info/nitrate-nitrite.php
  • http://dnr.wi.gov/org/water/dwg/nitrate.htm
  • http://www.chemetrics.com/index.php?Page=News&Action=news&newsid=35
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