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Village
of Waterville ________________________________________________________
Annual Drinking Water Quality Report for 2008
Village of Waterville Water System
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Table of Detected Contaminants |
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Contaminant |
Violation Yes/No |
Date of Sample |
Level Detected (Avg/Max) (Range) |
Unit Measurement |
MCLG / MRDLG |
Regulatory Limit (MCL, MRDL, TT or AL) |
Likely Source of Contamination |
| Radioactive Contaminants | |||||||
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Gross alpha activity (including radium – 226 but excluding radon and uranium) |
No |
2008 |
0.74 |
pCi/l |
0 |
MCL=15 |
Erosion of natural deposits. |
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Radium – 226 |
No |
2008 |
0.12 |
pCi/l |
0 |
MCL=5 |
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Radium – 228 |
No |
2008 |
2.14 |
pCi/l |
0 |
MCL=5 |
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| Inorganic Contaminants | |||||||
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Barium |
No |
10/06 |
0.210 |
mg/l |
2 |
MCL = 2 |
Erosion of natural deposits. |
| Copper |
No |
9/06 |
0.116 (1) (range = 0.011 - 0.164) |
mg/l |
1.3 |
AL = 1.3 |
Corrosion of household plumbing systems; Erosion of natural deposits. |
| Lead |
No |
9/06 |
2.29 (2) (range = ND - 5.18) |
ug/l |
0 |
AL = 15 |
Corrosion of household plumbing systems; Erosion of natural deposits. |
| Inorganics – Nitrate and Nitrite | |||||||
| Nitrate |
No |
11/08 |
1.5 |
mg/l |
10 |
MCL = 10 |
Runoff from fertilizer use; Erosion of natural deposits. |
| Disinfectants | |||||||
| Chlorine Residual |
No |
Daily / Monthly |
0.45 (3) (range = 0.3 - 0.6) |
mg/l |
N/A |
MRDL = 4 (4) |
Water additive used to control microbes. |
| Disinfection Byproducts | |||||||
| Total Trihalomethanes (TTHMs – chloroform, bromodichloromethane, dibromochloromethane and bromoform) |
No |
8/07 |
12.8 |
ug/l |
N/A |
MCL = 80 |
By-product of drinking water chlorination needed to kill harmful organisms. TTHMs are formed when source water contains large amounts of organic matter |
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Notes: |
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1 - The level presented represents the 90th percentile of the ten (10) sites tested. A percentile is a value on a scale of 100 that indicates the percent of a distribution that is equal to or below it. The 90th percentile is equal to or greater than 90% of the copper values detected at your water system. In this case, ten (10) samples were collected at your water system and the 90th percentile value was the ninth highest value. The action level for copper was not exceeded at any of the sites tested. |
| 2 - The level presented represents the 90th percentile of the ten (10) samples collected. The action level for lead was not exceeded at any of the sites tested. |
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3 - The levels presented represent the average and range of the levels reported on the microbiological sampling reports for the distribution samples. |
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4 - Value presented represents the Maximum Residual Disinfectant Level (MRDL) which is a level of disinfectant added for water treatment that may not be exceeded at the consumer’s tap without an unacceptable possibility of adverse health effects. MRDLs are currently not regulated but in the future they will be enforceable in the same manner as MCLs. |
| Definitions: |
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| Action Level |
AL |
The concentration of a contaminant that, if exceeded, triggers treatment or other requirements that a water system must follow. |
| 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. |
| 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. |
| 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. |
| 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 contamination. |
| Milligrams per liter |
mg/l |
Corresponds to one part of liquid in one million parts of liquid (parts per million - ppm). |
| Micrograms per liter |
ug/l |
Corresponds to one part of liquid in one billion parts of liquid (parts per billion - ppb). |
| Nephelometric Turbidity Unit |
NTU |
A measure of the clarity of water. Turbidity in excess of 5 NTU is just noticeable to the average person. |
| Non-Detected |
ND |
Laboratory analysis indicates that the constituent is not present. |
| Picocuries per liter |
pCi/l |
A measure of the radioactivity in water. |
| Treatment Technique |
TT |
A required process intended to reduce the level of a contaminant in drinking. |
As you can see by the table, our system had no violations. We have learned through our testing that some contaminants have been detected; however, all of these contaminants were detected below the level allowed by the State.
During 2008, our system was in compliance with applicable State drinking water operating, monitoring and reporting requirements.
Some people may be more vulnerable to disease causing microorganisms or pathogens 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 from their health care provider about their drinking water. EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium, Giardia and other microbial pathogens are available from the Safe Drinking Water Hotline (800-426-4791).
Although our system has an adequate amount of water to meet present and future demands, there are a number of reasons why it is important to conserve water:
Saving water saves energy and some of the costs associated with both of these necessities of life;
Saving water reduces the cost of energy required to pump water and the need to construct costly new wells, pumping systems and water towers; and
Saving water lessens the strain on the water system during a dry spell or drought, helping to avoid severe water use restrictions so that essential fire fighting needs are met.
You can play a role in conserving water by becoming conscious of the amount of water your household is using, and by looking for ways to use less whenever you can. It is not hard to conserve water. Conservation tips include:
Automatic dishwashers use 15 gallons for every cycle, regardless of how many dishes are loaded. So get a run for your money and load it to capacity.
Turn off the tap when brushing your teeth.
Check every faucet in your home for leaks. Just a slow drip can waste 15 to 20 gallons a day. Fix it up and you can save almost 6,000 gallons per year.
Check your toilets for leaks by putting a few drops of food coloring in the tank - watch for a few minutes to see if the color shows up in the bowl. It is not uncommon to lose up to 100 gallons a day from one of these otherwise invisible toilet leaks. Fix it and you save more than 30,000 gallons a year.
Thank you for allowing us to continue to provide your family with quality drinking water this year. In order to maintain a safe and dependable water supply we sometimes need to make improvements that will benefit all of our customers. The costs of these improvements may be reflected in the rate structure. Rate adjustments may be necessary in order to address these improvements. We ask that all our customers help us protect our water sources, which are the heart of our community. Please call our office if you have questions.
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