Public Water Supply District No. 2 of Jefferson County
2008 Annual Water Quality Report
(Consumer Confidence Report)

This report is intended to provide you with important information about your drinking water and the efforts to provide safe drinking water.

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

Our water source comes from the Big River.
Type: Surface 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 and potential health effects can be obtained by calling the EPA's Safe Drinking Water Hotline (800-426-4791).  Contaminants that may be present in source water include:

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 waste 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 basis to ensure its safety.  Our system has been assigned the identification number MO6024293 for the purpose of tracking our 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 affects drinking water quality or if you have any further questions about your drinking water report, please call us at 636-326-0200 or 636-938-5909 to inquire about scheduled meetings or contact persons.

Do I need to take special precautions?
Some people may be more vulnerable to contaminants in drinking water than the general population. Immune-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).

Contaminants Report Definitions
MCLG: Maximum Contaminant Level Goal, or 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 Contaminate level, or the highest level of contaminate that is allowed in drinking water. MCL's 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 microgram per liter
PPM: parts per million or milligrams per liter
n/a: not applicable
NTU: Nephelometric Turbidity Unit, used to measure the 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.

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