|
|
Contaminants
|
Violation
(Yes/No)
|
Date of
Sample
|
Level Detected
(Maximum) (Range)
|
Unit
Measurement
|
MCLG
|
Regulatory Limit
(MCL or AL)
|
Likely Source
of Contaminant
|
|
|
|
Inorganic Contaminants
|
|
Copper
|
No
|
July
/ August 2017
|
0.01 - 0.088
0.072 (1)
|
mg/L
|
1.3
|
AL
= 1.3
|
Corrosion of
household plumbing systems; Erosion of natural deposits
|
|
Lead
|
No
|
July / August 2017
|
ND - 5.6
1.7 (1)
|
ug/L
|
0
|
AL
= 15
|
Corrosion of
household plumbing systems; Erosion of natural deposits
|
|
Manganese
|
No
|
07/30/18
|
ND -
0.62
|
ug/L
|
n/a
|
MCL = 300
|
Naturally occurring
|
|
Barium
|
No
|
11/14/18
|
0.013 - 0.028
|
mg/L
|
2.0
|
MCL =
2.0
|
Naturally
occurring
|
|
Ammonia
|
No
|
01/17/18
|
ND - 0.33
|
mg/L
|
n/a
|
NONE
|
Naturally
occurring
|
|
Sodium
|
No
|
02/05/18
|
18.2 - 39.9
|
mg/L
|
n/a
|
No MCL(2)
|
Naturally
occurring
|
|
Iron
|
No
|
02/05/18
|
ND - 39
|
ug/L
|
n/a
|
MCL = 300
|
Naturally occurring
|
|
Fluoride
|
No
|
06/04/18
|
ND -
0.11
|
mg/L
|
50
|
MCL = 2.2
|
Naturally occurring
|
|
Zinc
|
No
|
01/17/18
|
ND - 0.066
|
mg/L
|
n/a
|
MCL =
5
|
Naturally
occurring
|
|
Nickel
|
No
|
01/17/18
|
ND -
5.7
|
ug/L
|
n/a
|
No MCL
|
Naturally occurring
|
|
Magnesium
|
No
|
06/04/18
|
9.5 - 17.7
|
ug/L
|
n/a
|
No MCL
|
Naturally
occurring
|
|
Chloride
|
No
|
02/05/18
|
ND -51.0
|
mg/L
|
n/a
|
MCL = 250
|
Naturally
occurring
|
|
Calcium
|
No
|
06/04/18
|
16.4 - 28.9
|
mg/L
|
n/a
|
No MCL
|
Naturally
occurring
|
|
Nitrate
|
No
|
08/20/18
|
2.1
- 8.3
|
mg/L
|
10
|
MCL = 10
|
Runoff from
fertilizer and leaching from septic tanks and sewage
|
|
Nitrite
|
No
|
09/10/18
|
ND - 0.46
|
mg/L
|
n/a
|
MCL = 1.0
|
Runoff from fertilizer and leaching from
septic tanks and sewage
|
|
Calcium
Hardness
|
No
|
06/04/18
|
37.7 -72.2
|
mg/L
|
n/a
|
No MCL
|
Naturally
occurring
|
|
Total Hardness
|
No
|
06/04/18
|
74.4 -145.0.2
|
mg/L
|
n/a
|
No MCL
|
Naturally occurring
|
|
Total Alkalinity
|
No
|
06/04/18
|
15.5 -101.0
|
mg/L
|
n/a
|
No MCL
|
Naturally occurring
|
|
Total Dissolved Solids (TDS)
|
No
|
06/04/18
|
140.0 -287.0
|
mg/L
|
n/a
|
No MCL
|
Naturally occurring
|
|
Turbidity
|
No
|
06/04/18
|
ND - 1.0
|
NTU
|
n/a
|
MCL = 5
|
Naturally occurring
|
|
Sulfate
|
No
|
11/14/18
|
25.5 - 48.6
|
mg/L
|
n/a
|
MCL = 250
|
Naturally occurring
|
|
Volatile Organic Contaminants
|
|
Tetrachloroethene
|
No
|
11/06/18
|
ND
- 0.62
|
ug/L
|
0
|
MCL
= 5
|
Industrial/Commercial
Discharge
|
|
MTBE
|
No
|
11/14/18
|
ND
- 1.3
|
ug/L
|
0
|
MCL
= 10
|
Gasoline
Additive
|
|
Disinfection
By-Products
|
|
Total Trihalomethanes (TTHMs)
|
No
|
08/14/18
|
ND - 7.0
|
ug/L
|
n/a
|
MCL = 80
|
Disinfection By-Products
|
|
Radionuclides
|
|
Gross Alpha
|
No
|
08/02/17
|
ND - 2.31
|
pCi/L
|
0
|
MCL = 15
|
Naturally occurring
|
|
Gross Beta
|
No
|
08/02/17
|
2.92 - 3.95
|
pCi/L
|
0
|
MCL = 50
|
Naturally occurring
|
|
Radium 226 &
228
|
No
|
08/02/17
|
1.04 - 2.25
|
pCi/L
|
0
|
MCL = 5(3)
|
Naturally occurring
|
|
Uranium
|
No
|
08/02/17
|
ND - 1.16
|
ug/L
|
n/a
|
MCL = 30
|
Naturally occurring
|
|
Unregulated Contaminant Monitoring Rule (4)
|
|
1,4 Dioxane
|
No
|
01/24/18
|
0.013 - 9.9
|
ug/L
|
n/a
|
HA = 35
|
Industrial Discharge
|
|
Chromium
|
No
|
09/02/14
|
ND - 1.0
|
ug/L
|
100
|
MCL = 100
|
Naturally deposits
|
|
Hexavalent
Chromium
|
No
|
05/27/14
|
ND - 1.1
|
ug/L
|
n/a
|
No MCL
|
Naturally deposits and Industrial
Discharge
|
|
Strontium
|
No
|
05/27/14
|
77.8 - 86.7
|
ug/L
|
n/a
|
HA =
4000
|
Naturally occurring
|
|
Chlorate
|
No
|
04/17/14
|
ND - 140
|
ug/L
|
n/a
|
No MCL
|
Naturally occurring
|
|
Bromide
|
No
|
07/30/18
|
72.6 - 265.0
|
ug/L
|
n/a
|
No MCL
|
Naturally occurring
|
Definitions:
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
Disinfection 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
Disinfection 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.
Health Advisory
(HA) - An estimate of acceptable drinking water levels
for a chemical substance based on health effects information; a health
advisory is not a legally enforceable Federal standard, but serves as
technical guidance to assist Federal, State and local officials.
Action Level
(AL) - The concentration of a contaminant which, if
exceeded, triggers treatment or other requirements which a water system
must follow.
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).
Non-Detects (ND)
- Laboratory analysis indicates that the
constituent is not present.
pCi/L -
pico Curies perLiter is a measure of radioactivity in water.
(1)- During 2017, we collected and
analyzed 30 samples for lead and copper. The action levels for both lead
and copper were not exceeded at any
site tested. The values reported for lead and copper represent the 90th
percentile.
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 lead and copper values detected at your water system. In our
sampling program, the 90th percentile value is the 4th highest result.
(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.
(3)- MCL for Radium
226 and 228 is a combined total Radium = 5 pCi/L.
(4)- UCMR3 -
Unregulated Contaminant Monitoring Rule 3 is a Federal
|