2007 Contaminant Testing Results for Crossville
*Note:
The state allows us to monitor for some conta-minants less than once per year because the concentrations of these contaminants do not  change frequently.  Some of our data though accurate may be more than one year old.
Turbidity is a measure of the cloudiness of the water.  We monitor it because it is a good indicator of the effectiveness of our filtration system.  The EPA has two requirements: (1) That the maximum level found must be less than 5 NTU; and (2) That the level must be under 0.3 NTU 95% of the time.
TTHMs: Some people who drink water containing Trihalomethanes in excess of the MCL of 100 parts per billion over many years may experience problems with liver, kidneys, or central nervous systems, and have an increased risk of getting cancer.
HAA5s: Some people who drink water containing Haloacetic Acids in excess of the MCL of 60 parts per billion over many years may have an increased risk of getting cancer.
Maximum Contaminant Level (MCL):  The highest level of a contaminant that is allowed in drinking water.  MCLs are set as close to the MCLGs as feasible using  the best available treatment technology.
Maximum Contaminant Level Goal (MCLG):  The level of a contaminant in drinking water below, which there is no known or expected risk to health.  MCLGs allow for a margin of safety
90th Percentile:  90% of samples are equal to or less than the number in the chart.
NTU or Nephelometric Turbidity Units:  A measure of clarity.
NA: Not applicable.
ND: Not detectable at testing limits.
Treatment Technique or TT:  A required process intended to reduce the level of a contaminant in drinking water.
Action Level or AL:  The concentration of a contaminant, which if exceeded, triggers treatment or other requirements, which a water system must follow.
Maximum Residual Disinfectant Level Goal (MRDLG): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water.
BDL: Below Detectable Limit
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
other 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.  IPA/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 (1-800-426-4791).  
Contaminant Unit MCLG MCL Level & Range Violation Year Potential Source of
  Health EPA's Detected (Yes/No) Sampled Contamination
  Goal Limits Holiday Hills Meadow Park    
           
Turbidity* NTU NA TT=5NTU 0.30 (highest) 0.15 (highest) NO 2007 The suspended matter in water.
      100% of samples below 0.3NTU    
Total Organic Carbon*   NA TT ave- 1.50 ave-1.60 NO 2007 Naturally present in the enviroment.
                 
Copper PPM 1.3 1.3 = AL 0.07 (90th percentile) NO 2006 Erosion of household plumbing systems; Erosion of natural deposits
        All 30 samples below AL    
Fluoride PPM 4 4 .83 (average) .92 (average) NO 2007 Erosion of natural deposits; Water additive to promote strong teeth
        0.46 - 1.22    
Lead** PPB 0 15 = AL 4 (90th percentile) NO 2006 Corrosion of household plumbing systems; Erosion of natural deposits
        93% below AL    
Nitrate PPM 10 10 BDL BDL NO 2007 Runoff from fertilizer use,leakage from septic tanks, sewage; Erosion of natural deposits
               
               
Chlorine Residual PPM MRDLG = 4   MRDL = 4 Distribution system NO 2007 Water additive used to kill disaese-
    Annual Average: 1.34     causing organisms such as viruses.
Total Trihalomethanes PPB NA 80 44 (average) 43 (average) NO 2007 Byproduct of drinking water chlorination.
(TTHMs)       35 - 55 37 - 57      
Haloacetic Acids PPB NA 60 23 (average) 32 (average) NO 2007 Byproduct of drinking water disinfection.
(HAA5s)       18 - 29 26 - 38      
Sodium PPM NA NA 19 18 NA 2007 Erosion of natural deposits
Hardness PPM NA NA 25 25 NA 2007 Erosion of natural deposits.
     *  We met the treatment technique requirement for total organic carbon and turbidity.                
Trihalomethanes & Haloacetic Acids: compounds formed when natural organic compounds from decaying vegetation and soil react with chlorine.
  * *ABOUT LEAD:
Infants and young children are typically more vulnerable to lead in drinking water than the general population. It is possible that lead levels at your home may be higher than at other homes in the community as a result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your home's water, you may wish to have your water tested and flush your tap for 30 seconds to 2 minutes before using your tap water. Additional Information is available from the Safe Drinking Water Hotline at (800-426-4791).
Cross Connections
Over the next few months, the warm weather will bring people outdoors to work in their yards and gardens and begin getting swimming
pools ready. The City of Crossville would like to ensure that our customers are aware of the dangers associated with these activities.
An ordinary garden hose is a common way to contaminate a water supply when the hose is submersed in any liquid or attached to
certain devices used to spray pesticides or herbicides. This forms a cross connection. A cross connection is a situation where a
possible source of contamination is directly linked to our public water system. If the end of your hose is connected to a chemical
container, swimming pool or other contaminent during a water main break or fire, the substance can be siphoned back into the
water system. This condition, known as back siphonage, could cause public health hazard. Devices are available to prevent this
problem; however the best solution is to always be careful how you use your water hose. Please help us provide a safe supply of
water to all of our customers. Remember, never place your water hose in anything you would not want to drink.