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Microbial contamination of drinking water in Miami-Dade County
Transcript of Microbial contamination of drinking water in Miami-Dade County
13,000 miles of pipes
6 water treatment plants
12-year, $12 billion overhaul to fix corroding water and sewer lines and decaying water treatment facilities Contaminants That May Be Present In
Source Water Include: E .Coli: bacterium that lives in the digestive tract of humans and animals.
Symptoms: bloody diarrhea, stomach cramps, nausea,vomiting
Cryptosporidium: a protozoan, gastrointestinal parasite.
Symptoms: watery diarrhea, dehydration,weight loss, stomach cramps/ pain, fever, nausea,vomiting Microbial contaminants: viruses, bacteria,from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
Inorganic contaminants: salts,metals, can be naturally-occurring or from urban storm water runoff, industrial or domestic wastewater discharges, oil and gas production, mining, farming.
Pesticides and herbicides contaminants: agriculture, urban stormwater runoff, and residential uses.
Radioactive contaminants: naturally occurring,oil and gas production, mining activities.
Organic chemical contaminants: synthetic and volatile organic chemicals,which are by-products of industrial processes,petroleum production, gas stations, urban stormwater runoff, and septic systems. By: Glori Nieves Microbial Contamination of Drinking Water in Miami-Dade County Where Does Our Drinking
Water Come From? Rivers, lakes, well water, natural springs and reservoirs.
Miami-Dade’s source of water is groundwater from wells.
The wells withdraw solely from the Biscayne Aquifer. A little History
In 1854, British scientist John Snow found cholera disease was spread through contaminated water. Snow used chlorine to kill the cholera bacteria in the water, leading to the rise of water chlorination as an effective disinfection process. His work also revolutionized the prevalent theory that good-tasting and odorless water naturally meant it was healthful and safe.
As a result of increased water treatment and chlorination within several U.S. cities and around the world, the outbreak of such waterborne diseases as cholera and typhoid rapidly decreased in the early twentieth century. Health Effects- Microbial Contaminants Health Effects-Inorganic Contaminants Health Effects- Pesticides and Herbicides Contaminants Atrazi
Cyanazine Health Effects-Organic Chemical Contaminants Benzene: colorless volatile liquid hydrocarbon, present in coal tar,petroleum. Where is Miami-Dade's Drinking Water Treated? How is Drinking Water Treated in Miami-Dade County? Statistics Water and Sewer Dep't (WASD) treatment facilities
The Alexander Orr, Jr. Plant serves customers who live south of SW 8 Street to about SW 264 Street.
The Hialeah and John E. Preston Plants treat water that is supplied to residents who live north of SW 8 Street up to the Miami-Dade/ Broward Line.
South Dade Water Supply System is comprised of five smaller water treatment plants that serve residents south of SW 264 Street in the unincorporated areas of the county.
Miami Dade's water is at the very least disinfected through chlorination.
Alexander Orr, Jr. Plant: lime treatment to reduce hardness, disinfected and filtered.
Hialeah treated same as Alexander plus fluoridation,air stripping- removes volatile organic compounds.
John E. Preston plant: higher levels of naturally organic materials than water at other plants. softening process, disinfected, fluoridated,filtered, air stripping towers. Are there Contaminants left in My Drinking Water After It's Treated? Where Can I Get More Information About My Drinking Water ? Environmental Protection Agency (EPA) water.epa.gov
Safe Drinking Water Hotline 1-800-426-4791
Department of Environmental Protection www.dep.state.fl.us/water (DEP)
Contact your local water utility company
Florida Department of Health (DOH)
Center for Disease Control and Prevention www.cdc.gov Lead: is an increasing problem in cities with older water systems. Water slowly corrodes the lead in municipal water systems and can cause a wide range of developmental difficulties for children and high blood pressure and kidney ailments in older adults.
Symptoms: (mainly in kids) Irritability,loss of appetite,weight loss, fatigue,abdominal pain,vomiting,constipation,learning difficulties. Adults: Kidney problems; high blood pressure Yes but........
the EPA sets regulations and standards to ensure our tap water is safe to drink. They limit the amount of certain contaminants in water provided by public water systems, called maximum contaminant level (MCL). The amounts allowed have been studied and determined to pose minimal health risks. can cause: Cardiovascular problems, cancer,anemia,impaired function of the eyes, liver, kidney, and spleen, reproductive problems,gastrointestinal problems,premature births More Microbial Contaminants Found in Drinking Water? Cholera
Giardia Symptoms: vomiting, irritation of the stomach,dizziness, convulsions, rapid or irregular heartbeat,death (at very high levels) Anemia; decrease in blood platelets; increased risk of cancer.
In Dec. 2009, tap water contaminants found in
Environmental Working Group’s (EWG) study.
In Case of Emergency
(Pipe Break, Hurricane etc.) Boil water
Test trips-if you suspect a problem by taste,color,odor.
Invest in good home Filter *References* Radium: targets bones, can cause cancers
Uranium: can cause cancer in bones, toxic on kidneys Health Effects-Radioactive Contaminants Copper
Arsenic Herbicides Miami-Dade County Being Sued? -Clean Water Act Aging Water and Sewage System Issues with our Water Infrastructure In Miami-Dade County, year 2005: Benzene was found at a county water treatment facility. The Northwest Wellfield, which supplies most of the county's drinking water.
1 of 15 wells there had registered benzene levels five times the limit established by the Environmental Protection Agency. , dangerous amounts of the benzene chemical entered the water supply. www.miaminewtimes.com http://www.miamiherald.com/2012/09/24/3014261/public-meetings-start-monday-on.html Miami-Dade Water and Sewer Department (WASD) 2011 Water Quality Report. In 2011, Dep't of Environmental Protection identified 68 potential sources of contamination in our system, low-mod. susceptibility levels. * bottled water = tap water?
*whoa, plastic bottles made from crude oil?
* plastic water bottles leak toxins back into the groundwater. Miami, FL Ranked #46 (2004-2008)
(Miami-Dade Water & Sewer Department serves 2,100,000 people) Disinfectant and Byproducts Chlorine trihalomethanes: mixing of chlorine/water high in organic acids. Chemical found in Miami-Dade county due to high total organic carbon in our groundwater. can cause: kidney/liver problems, increase risk of cancer.