Public Water Supply District No. 2 of Jefferson
County
2007 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.
Attencion!
Este informe contiene informacion muy importante. Traduscalo o
prequntele a alguien que lo entienda bien.
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
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:
 |
Microbial contaminants such as viruses and
bacteria, which may come from sewage treatment plants, septic
systems, agricultural livestock operations and wildlife. |
|
Inorganic contaminants such as salts and metals,
which can be naturally occurring or result from urban storm water
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 agriculture, urban storm water runoff
and residential uses. |
|
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. |
|
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
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.
|
Regulated Contaminants |
| Disinfection
By-products |
Monitoring
Period |
Units |
MCL |
MCLG |
RAA |
Range of
Detection |
Sources |
| Total
Haloacetic Acids (HAA5) |
2007 |
ppb |
60 |
0 |
22.03973 |
17-49 |
By-product of drinking water
disinfection |
| Total
Trihalomethanes (TTHM) |
2007 |
ppb |
80 |
0 |
37.57842 |
8.87-83.4 |
By-product of drinking water
chlorination |
| |
|
Regulated Contaminates |
Collection
Date |
Units |
MCL |
MCLG |
Highest Value |
Range |
Typical
Source |
| Barium |
4/26/2007 |
ppm |
2 |
2 |
0.0489 |
0.0489 |
Discharge of drilling wastes;
Discharge from Metal refineries; Erosion of natural deposits |
| Carbon, Total
Organic (TOC) |
1/15/2007 |
ppm |
|
|
6.74 |
0.85-6.74 |
Naturally present in the
environment |
| Chromium |
4/26/2007 |
ppb |
100 |
100 |
1.84 |
1.84 |
Discharge from steel and pulp
mills; erosion of natural deposits |
| Fluoride |
1/22/2007 |
ppm |
4 |
4 |
1.19 |
0.58-1.19 |
Erosion of natural deposits;
Water additive which promotes strong teeth; Discharge from
fertilizer and aluminum factories |
| Nitrate +
Nitrate (as N) |
1/15/2007 |
ppm |
10 |
10 |
0.3 |
0.3 |
Runoff from fertilizer use;
Leaching from septic tanks, sewage; Erosion of natural
deposits |
| |
| Lead and Copper |
| Units |
Action level |
Range |
90th Percentile |
Sites Over
AL |
Sources |
| ppm |
1.3 |
0.00115-0.0111 |
0.0032 |
0 |
Corrosion of household plumbing
systems |
|
Collection Period: 2005 - 2007 |
Turbidity
Turbidity is the measure of the cloudiness of water.
We monitor for turbidity because it is a good indicator of
the effectiveness of our filtration system. |
| % of samples
in compliance with standard |
Month
Occurred |
Violation |
Highest
Single Measurement for the Year |
Month
Occurred |
Sources |
| 99 |
6 |
No |
0.35 |
June |
Soil Runoff |
| Microbiological |
| Results |
MCL |
MCLG |
Typical Source |
|
No Detected Results were Found in
the Calendar Year of 2007 |
Corrosion of household plumbing systems |
|
Unregulated Contaminant Notice |
| Our water system participated
in the Unregulated Contaminant monitoring required by the
Environmental Protection Agency (EPA). This special monitoring
helps EPA decide if new contaminants of concern are found in
drinking water at levels that need to be controlled. We did
not detect any of these unregulated contaminants in our water.
If you want to review the individual results of the
monitoring, please contact us at the phone number listed under
"How might I become actively involved?". |
|
Violations and Health Effects
Information |
| There were no MCL, Monitoring,
or treatment technique violations for this report. |
