Definitions
for Contaminant Tables
The
following definitions are provided to assist you in understanding
our water quality test results presented in the tables on the next
two pages.
Action Level (
AL
) - The concentration of a contaminant which, if exceeded,
triggers treatment or other requirements which a water system must
follow.
Maximum Contaminant Level (MCL) -
The “Maximum Allowed” 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 (MCLG) - The “Goal” 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.
N/A – Not Applicable
ND – Not Detected
**Optimum Fluoride Level – 1.2
MCL’s
are set at very stringent levels.
To understand the possible health effects described for many
regulated constituents, a person would have to drink 2 liters of
water every day at the MCL level for a lifetime to have a
one-in-a-million chance of having the described health effect.
The
following tables list the drinking water contaminants we detected
during the 2005 calendar year.
In specific instances, the state allows us to test for some
substances less than once per year because the concentrations of
these sub-stances do not change significantly from year to year.
In these cases, where the last sample was taken prior to
2005, the sample date has been provided.
As
you can see by the table, we had no violations in any of the three
geographic areas that comprise our system.
We’re proud that your drinking water meets or exceeds all
Federal and State requirements.
2005
WATER QUALITY RESULTS
|
Kingbrook Phase I – Bruce
Water Treatment Plant
|
|
Substance
|
Sample
Date
|
Highest
Level Detected
|
Range
of
Detection
|
Ideal Goals (MCLG)
|
Highest Level Allowed (MCL)
|
Units
|
Likely source of substance
|
Inorganic
Substances
|
|
Barium
|
10-15-02
|
0.056
|
N/A
|
2
|
2
|
ppm
|
Erosion
of natural deposits
|
|
Chromium
|
10-15-02
|
1.6
|
N/A
|
100
|
100
|
ppb
|
Erosion
of natural deposits
|
|
Fluoride
|
11-23-05
|
1.4
|
.92-1.4
|
**
4
|
4
|
ppm
|
Water
additive to promote strong teeth
|
|
Nitrate
(as Nitrogen)
|
3-21-05
|
1.3
|
N/A
|
10.0
|
10.0
|
ppm
|
Fertilizer
runoff; leaking septic tanks; erosion of natural deposits
|
|
Water Quality Tests taken throughout the Distribution System
|
|
Haloacetic
Acids
|
8-11-04
|
6.4
|
N/A
|
0
|
60
|
ppb
|
By-products
of drinking water chlorination
|
|
Total
Trihalomethanes
|
8-11-04
|
36.2
|
14.0-36.2
|
0
|
80
|
ppb
|
By-products
of drinking water chlorination
|
Radioactive
Substances
|
|
Alpha
emitters
|
3-24-03
|
0.3
|
N/A
|
0
|
15
|
pCi/l
|
Erosion of natural deposits
|
|
Water Quality Tests taken at the Consumer's Tap Located within
Kingbrook Phase I
|
|
Substance
|
Sample Date
|
Level Detected
(90th Percentile)
|
# of Samples above the
AL
|
MCLG
|
MCL
|
Likely source of substance
|
|
Lead
|
8-11-03
|
7.4
|
0
|
0
|
AL
= 15
|
Corrosion
of household plumbing systems
|
|
Copper
|
8-9-03
|
1.14
|
0
|
0
|
AL
= 1.3
|
Corrosion
of household plumbing systems
|
|
Kingbrook Phase II – De Smet
Water Treatment Plant
|
|
Substance
|
Sample
Date
|
Highest
Level Detected
|
Range
of
Detection
|
Ideal Goals (MCLG)
|
Highest Level Allowed (MCL)
|
Units
|
Likely source of substance
|
Inorganic
Substances
|
|
Arsenic
|
11-16-05
|
3
|
N/A
|
N/A
|
50
|
ppb
|
Erosion
of natural deposits, runoff from orchards
|
|
Barium
|
11-19-03
|
0.019
|
N/A
|
2
|
2
|
ppm
|
Erosion
of natural deposits
|
|
Chromium
|
11-19-03
|
15.4
|
N/A
|
100
|
100
|
ppb
|
Erosion
of natural deposits
|
|
Fluoride
|
11-16-05
|
1.56
|
.95-1.56
|
|
