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Water Quality

Water Quality. What is polluting our water?. Cities require a very large input of freshwater and in turn have a huge impact on freshwater systems. Solid waste disposal is a growing threat to health and the environment. 93% of the urbanization occurs in poor or developing countries

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Water Quality

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  1. Water Quality What is polluting our water?

  2. Cities require a very large input of freshwater and in turn have a huge impact on freshwater systems. • Solid waste disposal is a growing threat to health and the environment. • 93% of the urbanization occurs in poor or developing countries • 789 million in total, lives without access to improved sanitation facilities. • The urban poor pay up to 50 times more for a liter of water than their richer neighbors, since they often have to buy their water from private vendors.

  3. Water on Earth

  4. 30% groundwater • MWD serves 18 million people in Southern California (Colorado River) • State water project

  5. Watershed: an area of land where all water that drains from it goes to the same place What does your watershed look like?

  6. CCHS is located in Ballona Creek Watershed • Concerns in Ballona • Urban runoff • Trash & debris • High nutrients • Bacterial levels • Heavy metals & toxins

  7. Marine Ecosystems Brown Pelican • Concerns in Malibu • Tapia Treatment Plant • Septic discharges • High nutrients • Bacterial levels California least tern Tidewater goby Steelhead Trout

  8. Santa Monica: Concerns in Santa Monica Canyon Channel

  9. How are pollutants transported?

  10. Fecal Pollution • Dogs • Livestock • Birds • People • WWTP discharges • Septic systems • Anthropogenic pollution • Surfactants • Nutrients • Oil and grease

  11. Nutrient Pollution

  12. Methods : Fecal indicator bacteria • Fecal indicator bacteria are generally not harmful bacteria that reside in the gut of animals • FIB are released into the environment with feces and used to indicate water quality • Limitations: • Method requires 24hr to get a result. • Does not give you information on the source www.idexx.com

  13. Data: Enterococci bacteria • Water quality standards • Enterococci: 104MPN/100mL • E. coli: • 400MPN/100mL • Which beach had highest levels? • Which watershed is most contaminated?

  14. Water Quality and Public Health Swimming related illness • Acute Respiratory disease • Gastrointestinal illness • Diarrhea • Vomiting • Nausea • Fever • Sore throat • Runny nose • Ear or Eye infection • Skin rash Bacteria • Escherichia coli • Salmonella typhi • Vibrio Cholerae • Campylobacter jejunji Viruses • Adenovirus • Enterovirus • Hepatitis A • Rotavirus

  15. Urban Runoff Source:http://geoscape.nrcan.gc.ca/

  16. Stormwater treatment Legacy Park in Malibu

  17. Point-of-use Treatment • Metal salts such as alum and iron sulfate can transform contaminated source waters into clear, safe drinkable water. Turbid river water treated with a flocculant-disinfectant powder in Borneo.

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