Community Water System routinely monitor for constituents in your drinking water according to Federal and State laws. This table shows the results of our monitoring for the period of January 1 st to December 31 st , 2003 . In this table you will find many terms and abbreviations you might not be familiar with. To help you better understand these terms we've provided the following definitions:
Parts per million (ppm) or Milligrams per liter (mg/l) - One part per million corresponds to one minute in two years or a single penny in $10,000.
Parts per billion (ppb) or Micrograms per liter - One part per billion corresponds to one minute in 2,000 years, or a single penny in $10,000,000.
Action Level - the concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
Maximum Contaminant Level - The "Maximum Allowed" (MCL) is 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 - The "Goal"(MCLG) is 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.
Nephelometric Turbidity Unit (NTU) - Nephelometric turbidity unit is a measure of the clarity of water. Turbidity in excess of 5 NTU is just noticeable to the average person.
Treatment Technique (TT) - A treatment technique is a required process intended to reduce the level of a contaminant in drinking water.
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 contaminants.
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TEST RESULTS | ||||||||||||
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MICROBIOLOGICAL CONTAMINANTS | ||||||||||||
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Contaminant |
Violation Y/N |
Level Detected |
Unit of Measurement |
MCLG |
MCL |
Major Sources in Drinking Water | ||||||
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Total Coliform Bacteria |
N |
1 |
Present |
0 |
> 1 positive monthly sample |
Naturally present in the environment | ||||||
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Turbidity |
N |
Highest yearly sample result: 0.29 |
NTU |
NA |
> .3NTU in > 5% of samples or any 1 sample > 1 NTU |
Soil runoff | ||||||
| Lowest monthly % of samples meeting the turbidity limit: 100% | ||||||||||||
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• Turbidity is a measure of the cloudiness of the water. We monitor it because it is a good indicator of the effectiveness of our filtration system | ||||||||||||
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INORGANIC CONTAMINANTS | ||||||||||||
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Contaminant |
Violation Y/N |
Level Detected |
Unit of Measurement |
MCLG |
MCL |
Major Sources in Drinking Water | ||||||
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Fluoride |
N |
0.62 |
ppm |
4 |
4 |
Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories | ||||||
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Nitrate [as Nitrogen] |
N |
0.19 |
ppm |
10 |
10 |
Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits | ||||||
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DISINFECTION BY-PROCUCT PRECURSORS | ||||||||||||||
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• The Total Organic Carbon (TOC) was routinely monitored in 2003, and because the source water TOC level was low, there was no requirement for TOC removal. Total organic carbon (TOC) has no health effects. However, total organic carbon provides a medium for the formation of disinfection by-products. These by-products include trihalomethanes (THMs) and haloacetic acids (HAAs). | ||||||||||||||
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REGULATED DISINFECTANTS | ||||||||||||||
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• Community Water System routinely monitors the disinfectant residual in your drinking water. In 2003, no samples exceeded the Maximum Residual Disinfection Level (MRDL) set by EPA. | ||||||||||||||
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VOLATILE ORGANIC CONTAMINANTS | ||||||||||||||
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Contaminant |
Violation Y/N |
Level Detected |
Unit of Measurement |
MCLG |
MCL |
Major Sources in Drinking Water | ||||||||
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HAA5 [Haloacetic Acids] |
N |
Highest running annual average: 57.5 |
ppb |
0 |
60 |
By-products of drinking water disinfection | ||||||||
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TTHM [Total trihalomethanes] |
N |
Highest running annual average: 37.7 Range: 19.4 - 58.9 |
ppb |
NA |
80 | |||||||||
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LEAD AND COPPER TAP MONITORING | ||||||||||||||
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Contaminant |
Number of Sites Over Action Level |
90 th Percentile Result |
95 th Percentile Result |
Unit of Measurement |
Action Level |
Major Sources in Drinking Water | ||||||||
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Lead |
0 |
0.003 |
0.007 |
ppm |
0.015 |
Corrosion from household plumbing systems; erosion of natural deposits. | ||||||||
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Copper |
0 |
0.05 |
0.05 |
ppm |
1.3 | |||||||||
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• Community Water System is on a reduced monitoring schedule and required to sample once per year for lead and copper at the customers' taps. Our last monitoring period was in 2003. Our next required monitoring period is the year 2004. | ||||||||||||||
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UNREGULATED CONTAMINANTS | ||||||||||||||
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Contaminant |
Level Detected |
Unit of Measurement |
MCLG |
Major Sources in Drinking Water | ||||||||||
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Chloroform |
10.9 |
ppb |
N/A |
By-products of drinking water disinfection | ||||||||||
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Bromodichloromethane |
2.56 |
ppb |
0 | |||||||||||
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Dibromochloromethane |
0.4 |
ppb |
60 | |||||||||||
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Bromoform |
0.1 |
ppb |
0 | |||||||||||
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• Unregulated contaminants are those for which EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulation is warranted. MCLs (Maximum Contaminant Levels) and MCLGs (Maximum Contaminant Level Goals) have not been established for all unregulated contaminants. | ||||||||||||||
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