|
Contaminants |
Violation (Yes/No) |
Date of Sample |
Level Detected (Maximum) (Range) |
Unit Measure-ment |
MCLG |
Regulatory Limit (MCL or |
Likely Source of Contaminant |
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Inorganic Contaminants |
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|
Copper |
No |
June, July, Aug. 2005 |
ND - 0.1(1) |
mg/l |
1.3 |
|
Corrosion of household
plumbing; erosion of natural deposits |
|
Lead |
No |
June, July, Aug. 2005 |
ND - 1.14(1) |
ug/l |
0 |
|
Corrosion of household
plumbing; erosion of natural deposits |
|
Iron |
No |
09/12/07 |
ND |
ug/l |
N |
MCL = 300 |
Naturally occurring |
|
Sodium |
No |
12/05/07 |
16.4 - 32.4 |
mg/l |
n/a |
No MCL(2) |
Naturally occurring |
|
Magnesium |
No |
01/03/07 |
8.5 - 15.5 |
mg/l |
n/a |
None |
Naturally occurring |
|
Chloride |
No |
12/05/07 |
29.2 - 79.8 |
mg/l |
n/a |
MCL = 250 |
Naturally occurring |
|
Calcium |
No |
01/03/07 |
15.8 - 24.4 |
mg/l |
n/a |
No MCL |
Naturally occurring |
|
Nitrate |
No |
12/03/07 |
3.4 - 5.3 |
mg/l |
10 |
MCL = 10 |
Runoff from fertilizer and
leaching from septic tanks and sewage |
|
Sulfate |
No |
01/09/07 |
5.9 - 39.8 |
mg/l |
n/a |
MCL = 250 |
Naturally occurring |
|
Perchlorate |
No |
05/17/06 |
ND - 1.4 |
ug/l |
n/a |
None(3) |
Fertilizer |
|
Radionuclides |
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|
Gross Alpha |
No |
01/24/07 |
ND - 3.2 |
pCi/L |
n/a |
MCL = 15 |
Naturally occurring |
|
Radium 228 |
No |
04/05/07 |
ND - 2.2 |
pCi/L |
None |
No MCL |
Naturally occurring |
|
Synthetic Organic Contaminants Including Pesticides
and Herbicides |
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|
None Detected |
-- |
-- |
ND |
-- |
-- |
-- |
-- |
|
Volatile Organic Contaminants |
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|
Tetrachloroethene |
No |
10/06/07 |
ND - 4.2 |
ug/l |
0 |
MCL = 5 |
Industrial/Commercial
Discharge |
|
Trichloroethene |
No |
08/07/07 |
ND - 2.6 |
ug/l |
0 |
MCL = 5 |
Industrial/Commercial
Discharge |
|
MTBE |
No |
05/01/07 |
ND - 1.2 |
ug/l |
0 |
MCL = 10 |
Gasoline Additive |
|
Total Trihalomethanes |
No |
01/08/07 |
ND - 2.5 |
ug/l |
na |
MCL = 80 |
Disinfection By-Product |
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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. |
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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. |
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Action Level ( |
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Milligrams per
liter (mg/l) - Corresponds
to one part of liquid in one million parts of liquid (parts per million - ppm). |
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Micrograms per
liter (ug/l) - Corresponds to one part of liquid in one billion
parts of liquid (parts per billion - ppb). |
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pCi/L - pico Curies per Liter
is a measure of radioactivity in water. |
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Non-Detects (ND) - Laboratory analysis indicates that the
constituent is not present. |
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(1) - During 2005 we collected and analyzed 30 samples
for lead and copper. The 90%
percentile level is presented in the table.
The action levels for both lead and copper were not exceeded at any site
tested. |
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(2) - No MCL has been established for sodium. However, 20 mg/l is a recommended guideline
for people on high restricted sodium diets and 270 mg/l for those on moderate
sodium diets. |
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(3) - Perchlorate is not
regulated by the USEPA. However, |
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