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Water Quality Report for Village of Nashville

                                              June 2011

  This report covers the drinking water quality for the Village of Nashville for the calendar year 2010. This information is a snapshot of the quality of the water we provided to you in 2010. Included are details about where your water comes from, what it contains, and how it compares to Environmental Protection Agency (EPA) and state standards.

 

  The water we supply you comes from three groundwater wells located on Sherman Street and Water Alley. The state of Michigan will be performing an assessment of our source water by 2011. We will inform you how to get a copy of this assessment report when it becomes available.

 

*   Contaminants and their presence in water:

     Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not     necessarily indicate the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the EPA's Safe Drinking Water Hotline at 1-800-426-4791.

 

* Vulnerability of sub-populations:

     Some people may be more vulnerable to contaminants in drinking water than the     general population. Immuno-compromised persons such as persons with cancer     undergoing chemotherapy, persons who have undergone organ transplants, people with     HIV/AIDS or immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline at 1-800-426-4791.

 

* Sources of Drinking Water:

   The sources of drinking water (both tap water and bottled water) include    rivers, lakes, streams, ponds, reservoirs, springs, and wells. Our water comes from wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and in some cases, radioactive materials, and can pick up substances resulting from the presence of animals or from human activity.

 

* Contaminants that may be present in source water include:

  

    * Microbial contaminants, such as viruses and bacteria, which may come from        sewage treatment plants, septic systems, agricultural operations and wildlife.

    * Inorganic contaminants, such as salts and metals, which can be naturally-occurring        or result from runoff , industrial or domestic wastewater discharges, oil and gas        production, mining or farming.

    * Pesticides and herbicides, which may come from a variety of sources such as        agricultural and urban storm water run-off.

     * Radioactive Contaminants, which may be naturally occurring or the result of oil and gas production and mining activities.

    * Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can, also,               come from gas stations, urban storm water runoff, and septic systems.

 

  In order to ensure tap water is safe to drink, EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. Food and Drug Administration regulations establish limits for contaminants in bottled water which provide the same protection for public health.

 

  The attached table lists all drinking water contaminants that we detected during the 2010 calendar year. The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. Unless otherwise noted, the data presented in this table is from testing done January 1 - December 31, 2010. The state allows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. All of the data is representative of the water quality, but some are more than one year old. Over the past year our system did not collect the required number of samples for Halocetic Acid (HAA5) and Total Trihalomethanes (TTHMs)which are both disinfection byproducts resulting from the chlorine we add to your water to control microbial contaminants. The samples that were required in 2010 will be collected in 2011 and the results of those tests will be published in the 2011 Consumer Confidence Report. We are required to monitor your drinking water for specific contaminants on a regular basis. Results of regular monitoring are an indicator of whether or not your drinking water meets health standards. During 2010 we did not complete all monitoring for HAA5 and TTHMs and therefore cannot be certain of the levels of Halocetic Acid and Total Trihalomethanes in your drinking water at this time. However historic testing for those disinfection byproducts have indicated that our water has always been well below Maximum Contaminant Levels (MCL)and contain either non-detectible or very low levels of these contaminants. The results of prior year tests are included in the table in this report and as noted are well below the Maximum Contaminant Level (MCL) set by the EPA. Since the amount of chlorine added to your drinking water has remained consistent over the last several years, one might expect our levels of disinfection byproducts have remained consistently at very low to non-detectible levels also. This is not an immediate health risk. If it had been, you would have been notified immediately. We will monitor for disinfection byproducts in June 2011 and return to compliance. The results of those samples will be available upon request and will also be published in the 2011 Consumer Confidence Report. For more information, please contact Scott Decker at 517-852-9571 or 269-818-7826.

 

 

Terms and abbreviations used in the table:

 

Maximum Contaminant Level Goal (MCLG) :  The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLG's allow for a margin of safety.

Maximum Contaminant Level (MCL):  The highest level of contaminant that is allowed in drinking water. MCL's are set as close to the MCLG's as feasible using the best available treatment technology.

N/A: Not applicable

ND: Not detectable at testing limit

ppb: parts per billion or micrograms per liter

ppm: parts per million or milligrams per liter

pCi/l: Pico curies per liter ( a measure of radiation)

Action level: The concentration of a contaminant, which if exceeded, triggers treatment or other requirements which water systems must follow.

 Maximum Residual Disinfectant Level(MRDL): The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of disinfectant is necessary for the control of microbial contaminants.

Maximum Residual Disinfection Level Goal (MRDLG):The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLG’s do not reflect the benefits of the use of disinfectants to control microbial contaminants.

 

Regulated Samples Collected from the Wells or Plant Tap
ContaminantOur Highest Water ResultsMCLMCLGDate Violation Yes or NoLikely Source of Contaminant
Fluoride (mg/l)0.18449/8/2010NoWater additive which promotes strong teeth; Erosion of natural deposits.
Arsenic * (ug/l)3 ppb10108/5/2009NoErosion of natural deposits; Runoff from orchards, and glass & electronics production waste.
Barium (mg/l)0.18228/5/2009NoErosion of natural deposits; Discharge of drilling waste, and from metal refineries.
NitrateN/D10109/8/2010No Erosion of natural deposits; Leaching of septic tanks, run off from fertilizer.
*  These arsenic values are effective January 23, 2006.  Until then, the MCL is 50 ppb and there is no MCLG.
Radiological Contaminants Sampled from the Wells or Plant Tap
Gross Alpha      (IRP # 1 & # 2)  pCi/l<31507/28/2003NoErosion of natural deposits from certain minerals that are radioactive.
Radium 226/228 (IRP # 1 & # 2)  pCi/l<1507/28/2003NoErosion of natural deposits.
** Unregulated Samples Collected from the Wells or Plant Tap
Sodium (mg/l)0.27NANA8/5/2009NAErosion of natural deposits.
          
       
** Unregulated contaminants are those for which EPA has not established drinking water standards.  Monitoring helps EPA to determine where certain contaminants occur and whether it needs to regulate those contaminants.
Regulated Samples Collected from the Distribution System
Maximum Residual Disinfectant (Chlorine) Level (mg/l)2.2442010NoWater additive used to control microbes.
Total Trihalomethanes (ug/l)21 ppb80NA8/30/2007N/AByproduct of drinking water disinfection.*
Haloacetic Acids (ug/l)N/D60NA8/30/2007N/AByproduct of drinking water disinfection.**
More Regulated Samples Collected from the Distribution System
Contaminant90th Percentile of Our WaterAction Level (AL)# of sites over the Action Level (AL)DateTypical source of contaminant
Lead (ug/l)0.0021.3 mg/l06/24/2008Corrosion of Household plumbing; Erosion of natural deposits.
Copper (ug/l)0.35.015 mg/l06/24/2008
Bacteriological Samples Collected from the Distribution System
ContaminantOur # DetectedMCLMCLGViolation Yes or NoTypical source of contaminant
Total Coliform Bacteria01 positive monthly sample (or 5% of monthly samples positive)0NoNaturally present in the environment.
*Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience 
problems with their liver,kidneys, or central neurvous system, and may have an increased risk of getting cancer.
** Some people who drink water containing haloacetic acids in excess of the MCL over many years may have an 
increased risk of getting cancer