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.
May 2011
WATER QUALITY REPORT FOR 2010
FOR WYOMING, IOWA
This report contains important information regarding the water quality in our water system. The source of our water is groundwater. Our groundwater is drawn from the Silurian and Prairie du Chien aquifers. Our water quality testing shows the following results:
|
CONTAMINANT |
MCLG |
MCL |
DETECTED LEVEL |
DATE SAMPLED |
RANGE OF DETECTION |
VIOLATION |
SOURCE |
|
|
Lead (ppb) |
0 |
AL=15 |
0 90th percentile |
06/25/08 |
ND –3 |
No |
Corrosion of household plumbing systems; erosion of natural deposits |
|
|
Chlorine (ppm) |
MRDLG =4.0 |
MRDL=4.0 |
02.9 |
RAA |
0.5-5.0 |
No |
Water additive used to control microbes |
|
|
Copper (ppm) |
1.3 |
AL=1.3 |
0.393 |
06/25/08 |
0.021-0.46 |
No |
Corrosion of household plumbing systems; Erosion of natural deposits |
|
|
Nitrate [as N] (ppm) |
10 |
10 |
0.76 |
04/01/10 |
|
No |
Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits |
|
|
Sodium (ppm) |
N/A |
N/A |
13 |
03/24/09 |
|
No |
Erosion of natural deposits; Added to water during treatment process |
|
|
Toluene (ppm) |
1 |
1 |
.00065 |
10/28/10 |
No |
Discharge from petroleum factories. |
||
Note: Contaminants with dates indicate results from the most recent testing done in accordance with regulations.
DEFINITIONS
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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. |
|
|
ppb -- parts per billion. |
|
|
ppm -- parts per million. |
|
|
pCi/L – picocuries per liter |
|
|
N/A – Not applicable |
|
|
ND -- Not detected |
|
|
Treatment Technique (TT) – A required process intended to reduce the level of a contaminant in drinking water. |
|
|
Action Level (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. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants. |
MONITORING VIOLATIONS
Total Haloacetic Acids ( HAA5) and Trihalomethanes (TTHM) was not tested by 8/31/2010. Failure to monitor and report compliance date in accordance with law. Adverse health effects, if any, are not known. Monitoring and reporting procedures are being corrected. Tests will be performed in July 2011.
GENERAL INFORMATION
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 posed a health risk. More information about contaminants or potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline (800-426-4791).
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. 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).
Lead. Infants and children who drink water containing lead in excess of the action level could experience delays in their physical or mental development. Children could show slight deficits in attention span and learning abilities. Adults who drink this water over many years could develop kidney problems or high blood pressure.
SOURCE WATER ASSESSMENT INFORMATION
The City of Wyoming water supply obtains its water from one or more groundwater aquifers. Every aquifer has a degree of susceptibility to contamination because the characteristics of the aquifer, overlying materials, and human activity. Susceptibility to contamination generally increases with shallower aquifers, increasing permeability of the aquifer and overlying material, nearby development or agricultural activity, and abandoned or poorly maintained wells. There is a medium susceptibility in the Silurian aquifer. A detailed evaluation of your source water was completed by the IDNR, and is available from the City of Wyoming at 563-488-3970.
CONTACT INFORMATION
For questions regarding this information, please contact Sheri Tjaden at City Hall during the following hours: 8 a.m.-4 p.m.
Decisions regarding the water system are made at the Wyoming City Council meetings held on the second Monday of the month at 7 p.m. at City Hall, 141 W. Main St. and are open to the public.
Reports will be mailed with the June utility bills. Copies are available at City Hall.