Source Name	Type
WELL # 5   1956	Ground Water
WELL # 6   1969	Ground Water
WELL # 7	Ground Water

Source Water Assessment:

The Department of Natural Resources conducted a source water assessment to determine the susceptibility of our water source to potential contaminants.  This process involved the establishment of source water area delineations for each well or surface water intake and then a contaminant inventory was performed within those delineated areas to assess potential threats to each source.  Assessment maps and summary information sheets are available on the internet at http://maproom.missouri.edu/swipmaps/pwsid.htm.  To access the maps for your water system you will need the State-assigned identification code, which is printed at the top of this report.  The Source Water Inventory Project maps and information sheets provide a foundation upon which a more comprehensive source water protection plan can be developed.

Why are there contaminants in my 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 that water poses a health risk.  More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline (800-426-4791).

Contaminants that may be present in source water include:
 A. Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock  
      operations, and wildlife.

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

  C. Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.

  D. 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 stormwater runoff, and septic systems.

  E. Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.

In order to ensure that tap water is safe to drink, the Department of Natural Resources prescribes regulations which limit the amount of certain   contaminants in water provided  by public water systems.  Department of Health regulations establish limits for contaminants in bottled water which  must provide the same protection for public health.

  Is our water system meeting other rules that govern our operations?

The Missouri Department of Natural Resources regulates our water system and requires us to test our water on a regular basis to ensure it's safety. Our system has been assigned the identification number MO6010213 for the purposes of tracking our test results.  Last year, we tested for a variety of contaminants.  The detectable results of these tests are on the following pages of this report.  Any violations of state requirements or standards will be further explained later in this report.

  How might I become actively involved?
If you would like to observe the decision-making process that affect drinking water quality or if you have any further questions about your drinking water report, please call us at 636-586-3326 to inquire about scheduled meetings or contact persons.

  Do I need to take any special precautions?
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 trans-plants, 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. 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 (800-426-4791).

Definitions:

  MCLG: Maximum Contaminant Level Goal, or 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.

  MCL:  Maximum Contaminant Level, or 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.

  AL:  Action Level, or the concentration of a contaminant which, when exceeded, triggers treatment or other requirements which a water system must follow..

   TT: Treatment Technique, or a required process intended to reduce the level of a contaminant in drinking water.

   90th percentile: For lead and Copper testing.  10% of test results are above this level and 90% are below this level.

   Level Found: is the average of all test results for a particular contaminant.

  Range of Detections: Shows the lowest and highest levels found during a testing period, if only one sample was taken, then this number equals the Level Found.

  MRLDG: Maximum Residual Disinfectant Level Goal, or the level of a drinking water disinfectant below which there is no known or expected risk to health.

  MRDL: Maximum Residual Disinfectant Level, or the highest level of a disinfectant allowed in drinking water.

  Abbreviations:

  PPB: parts per billion or micrograms per liter.

  ppm: parts per million or milligrams per liter.

  n/a: not applicable.

  NTU: Nephelometric Turbidity Unit, used to measure cloudiness in drinking water.

  MFL: million fibers per liter, used to measure asbestos concentration.

   nd: not detectable at testing limits.

The state has reduced monitoring requirements for certain contaminants to less often than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year.  Records with a sample year more than one year old are still considered representative.

 

Regulated Contaminants

Regulated Contaminants	Collection Date	Highest Value	Range	Unit	MCL	MCLG	Typical Source
ARSENIC	6/10/2008	2.35	1.02 - 2.35	ppb	10.000		Erosion of natural deposits
BARIUM	8/20/2008	0.136	0.0878 - 0.136	ppm	2	2	Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits
CADMIUM	8/20/2008	3.97	2.76 - 3.97	ppb	5	5	Corrosion of galvanized pipes; Erosion of natural deposits; Discharge from metal refineries; Runoff from waste batteries  and paints
CHROMIUM	6/10/2008	3.68	2.64 - 3.68	ppb	100	100	Discharge from steel and pulp mills
FLUORIDE	2/28/2008	0.11	0.1 - 0.11	ppm	4.0	4	Natural deposits; Water additive which promotes strong teeth.
TOLUENE	8/20/2008	0.00083	0.00083	ppm	1	1	Discharge from petroleum factories
XYLENES	8/20/2008	0.00103	0.00103	ppm	10	10	Discharge from petroleum factories; Discharge from chemical factories

 

Lead and Copper	Date	90TH Percentile	Range	Unit	AL	Sites Over AL	Typical Source
COPPER	2005 - 2007	0.178	0.0174 - 0.372	ppm	1.3	0	Corrosion of household plumbing systems
LEAD	2005 - 2007	4.7	1.03 - 24.7	ppb	15	2	Corrosion of household plumbing systems

 

Microbiological	Result	MCL	MCLG	Typical Source
No Detected Results were Found in the Calendar Year of 2008

DESOTO                                                                      MO6010213
2008 Annual Water Quality Report
(Consumer Confidence Report)

Radionuclides	Collection Date	Highest Value	Range	Unit	MCL	MCLG	Typical Source
GROSS ALPHA PARTICLE ACTIVITY, TOTAL	3/12/2007	8.2	6 - 8.2	pCi/l			Erosion of natural deposits
RADIUM, COMBINED (226, 228)	3/12/2007	1.4	0.9 - 1.4	pCi/l	5		Erosion of natural deposits
RADIUM-226	3/12/2007	1.4	0.9 - 1.4	pCi/l	5	0

 

Violations and Health Effects Information

During the 2008 calendar year, we had the below noted violation(s) of drinking water regulations.

 

Type	Category	Analyte	Compliance Period
No Violations Occurred in the Calendar Year of 2008

 

Any Additional Required Health Effects Language or Violation Notices

Additional Required Health Effects Language:

 

Infants and 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 tap water.  Additional information is available from the Safe Drinking Water Hotline (800-426-4761).

There are no additional required health effects violation notices.

 

Optional Monitoring (not required by EPA)

Optional Contaminants

Monitoring is not required for optional contaminants.

Secondary Contaminants	Collection Date	Highest Value	Range	Unit	MCL	MCLG	Typical Source
ALKALINITY, CACO3 STABILITY	8/20/2008	392	281 - 392	MG/L
ALKALINITY, TOTAL	5/24/2006	343	280 - 343	MG/L
CALCIUM	6/10/2008	70.9	63.8 - 70.9	MG/L
CHLORIDE	6/10/2008	7.68	6.69 - 7.68	MG/L	250
HARDNESS, CARBONATE	8/20/2008	342	299 - 342	MG/L
IRON	8/20/2008	0.0917	0.0127 - 0.0917	MG/L	0.3
MAGNESIUM	8/20/2008	40.2	34 - 40.2	MG/L
MANGANESE	8/20/2008	0.00618	0.00118 - 0.00618	MG/L	0.05
PH	8/20/2008	7.87	7.45 - 7.87	PH

                                                               

 

                                                          DESOTO                                                MO6010213  

2008 Annual Water Quality Report

(Consumer Confidence Report)

POTASSIUM	6/10/2008	1.35	1.24 - 1.35	MG/L
SODIUM	6/10/2008	5.58	2.22 - 5.58	MG/L		20
SOLIDS, TOTAL DISSOLVED (TDS)	6/10/2008	341	306 - 341	MG/L	500
SULFATE	2/28/2008	41	20.2 - 41	MG/L	250
XYLENE, META AND PARA	8/20/2008	0.75	0.75	UG/L
ZINC	8/20/2008	0.503	0.0232 - 0.503	MG/L	5