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4
AGENDA ITEM # 413
APRIL 25, 2011
WATER QUALITY DATA
2010
4
4
1.3
0.2 -3.5
Water additive used to
control microbes
N
226 +228 or
MCL
60
Sample
Maximum
Goal
Highest
Range
Typical Source of
Viola -
Substance
Date
Level
(MCLG or
Level
of
Contaminant
tion
—Units
Allowed
MRDLG)
Detected
Results
(pci/L)
(Y/N)
80
N/A
(MCL or
0 of 60
(IH.D)
N
(tap water)
7/08-
8/08
AL =15
0
MRDL)
53.24
53.24
(Max.)
N
(TTHMs)
INORGANIC CONTAMINANTS:
Results in the HLD
column are the highest detected level at any sam lin point)
the AL
of natural deposits
(ppb)
Discharge of drilling wastes;
Barium
2/08
2
2
0.03
0.027 —
discharge from metal
N
(ppm)
0.03
refineries; erosion of natural
deposits
Erosion of natural deposits;
discharge from fertilizer and
Fluoride
0.76—
aluminum factories. Water
(ppm)
2/08
4.0
4
0.88
0.88
additive which promotes
N
strong teeth when at
optimum levels between 0.7
and 1.3 ppm.
Residue from man-made
Lead oint
pollution such as auto
of entry)
2/08
15
0
1.9
ND — 1.9
emissions and paint; lead
N
(ppb)
pipe, casing
and solder
Sodium
(pp
2/08
160
N/A
20
13— 20
Salt water intrusion,
leaching from soil
N
BADIOACTIN
CONTAMMANTC-
tPopiltc in the
FILL rnlumn
are the highest
detected level at anv sampling
point)
Radium
Monthly
2010
4
4
1.3
0.2 -3.5
Water additive used to
control microbes
N
226 +228 or
7/10
60
N/A
27.16
18.63 -
By- rodt of
N
combined
3/08
5
0
0.4
ND — 0.4
Erosion of natural deposits
N
radium
= 0.17
the AL
from wood preservatives
(pci/L)
7/10
80
N/A
46.99
0 of 60
By- product drinking
N
D1StNV'EC'l'lUN BY- IrKUllUU IN: (I ne result to me t1LU column Jor unlorine is the annum uveruKe vj the yuuroei v
averages of results from all sample sites. The result in the HLD column for HAASs and TTHMs is the average of samples
taken for compliance. The Range of Results for HAASs and TTHMs is the range of individual sample results - lowest to
hiohnct_ fnr nll mnnitnrina Inrntinn.c inrludina IDSF. results as well as Stage 1 compliance results.)
Chlorine
(ppm)
Monthly
2010
4
4
1.3
0.2 -3.5
Water additive used to
control microbes
N
alp tc c
s
7/10
60
N/A
27.16
18.63 -
By- rodt of
N
PP
8/08
results
38.51
water ism ection
Total
= 0.17
the AL
from wood preservatives
Trihalo-
metbanes
7/10
80
N/A
46.99
0 of 60
By- product drinking
N
(tap water)
7/08-
8/08
AL =15
0
percentile
results
53.24
53.24
n
water disinfection
N
(TTHMs)
= 2.6
the AL
of natural deposits
(ppb)
1 ■.N.\ M.101 s7Ya7 J J!N!A- FAIA1!W Y.\ J -Ir"I 41 J w ICI
___90
0 of 60
Corrosion of household
Copper
(tap water)
7/08-
AL =1.3
1.3
percentile
homes
plumbing systems; erosion
N
8/08
results
exceeded
of natural deposits; leaching
(ppm)
= 0.17
the AL
from wood preservatives
Lead
90
0 of 60
Corrosion of household
(tap water)
7/08-
8/08
AL =15
0
percentile
results
homes
exceeded
plumbing systems; erosion
N
(ppb)
= 2.6
the AL
of natural deposits