|
Contaminant |
Violation
Y/N
|
Highest
No. of dections
|
No.
of months in violation |
Unit
Measurement
|
MCL in CCR units
|
PHG
|
MCLG
|
Likely
Source of Contamination
|
|
Total Coliform Bacteria
|
N |
0
|
0 |
0
|
For
systems that collect less than 40 samples per month,
no more than 1 positive sample
|
0
|
0
|
Naturally
present in the environment |
|
Fecal
coliform and E.coli |
N
|
0
|
0
|
0
|
a
routine sample and repeat sample are total coliform
positive, and one is also fecal coliform or E.
coli positive
|
0
|
0
|
Human and animal fecal waste |
|
Turbidity
|
N
|
0.2 |
0.1/0.4
|
TT
|
5
|
N/A
|
N/A
|
Soil
runoff' |
RADIOACTIVE CONTAMINANTS
| Contaminant |
Violation
Y/N
|
Level
Detected
|
Range |
Unit
Measurement
|
MCL in CCR units
|
PHG
|
MCLG
or MRDLG |
Likely
Source of Contamination
|
| Gross
Alpha |
N
|
5.6
|
N/D/11.3 |
pCi/L
|
15
|
N/A
|
N/A
|
Erosion
of natural deposits |
|
Uranium
|
N
|
5.1 |
N/D/10.4 |
pCi/L
|
20
|
0.43 |
N/A
|
Erosion
of natural deposits |
|
Radon
|
N
|
268 |
256/524
|
pCi/L
|
N/A
|
N/A
|
0*
|
Naturally occurring in soil
|
INORGANIC CONTAMINANTS
|
Contaminant |
Violation
Y/N
|
Level
Detected
|
Range |
Unit
Measurement
|
MCL in CCR units
|
PHG
|
MCLG
or MRDLG |
Likely
Source of Contamination
|
| Arsenic
|
N
|
1.8
|
N/D/4.1
|
ppb
|
10
|
0.004 |
0.004
|
Erosion
of natural deposits; runoff from orchards; glass and
electronics production wastes
|
|
Fluoride
|
N
|
0.4
|
0.26/1.0
|
ppm
|
2.0
|
1
|
1
|
Erosion
of natural deposits; water additive which promotes strong
teeth; discharge from fertilizer and aluminum factories |
|
Nitrate
(as No3)
|
N
|
12 |
8.4/23 |
ppm
|
45
|
45
|
45 |
Runoff
and leaching from fertilizer use; leaching from septic
tanks and sewage; erosion of natural deposits
|
|
Nitrate
+ Nitrite as Nitrogen
|
N
|
2495
|
1800/6800 |
ppm
|
10,000
|
10,000
|
10,000
|
Runoff
and leaching from fertilizer use; leaching from septic
tanks and sewage; erosion of natural deposits
|
DISTRIBUTION SYSTEM - DISINFECTION BYPRODUCTS,
DISINFECTANT RESIDUALS
|
Contaminant |
Violation
Y/N
|
Level
Detected
|
Range |
Unit
Measurement
|
MCL in CCR units
|
PHG
|
MCLG
|
Likely
Source of Contamination
|
|
TTHMs
- Total Trihalomethanes |
N
|
2.5 |
2.5/45.5
|
ppb
|
80
|
N/A
|
N/A
|
Byproduct
of drinking water chlorination |
|
Halocetic
Acids |
N
|
0.3 |
0.3/8.0 |
ppb
|
60
|
N/A
|
N/A |
Byproduct
of drinking water disinfection
|
|
Chlorine
|
N
|
0.52
|
0.36/0.57 |
ppm
|
4.0
|
4
|
4
|
Drinking
water disinfection added for treatment |
SECONDARY STANDARDS
| Constituent |
Violation
Y/N
|
Level
Detected
|
Range |
Unit
Measurement
|
MCL in CCR units
|
PHG
|
MCLG
or MLDRG |
Likely
Source of Contamination
|
|
Chloride
|
N
|
17
|
4.5/53 |
ppm
|
500
|
N/A
|
N/A
|
Runoff/leaching
from natural deposits; seawater influence
|
| Barium |
N |
0.12 |
ND/130 |
ppb |
1000 |
N/A |
N/A |
Discharge of oil drilling wastes and from metal
refineries, erosion of natural deposits |
|
Iron
|
N
|
0.14
|
ND/160
|
ppb
|
300
|
N/A
|
N/A
|
Leaching
from natural deposits, industrial wastes
|
|
Odor
|
N
|
1
|
1/1
|
TON
|
3
|
N/A
|
N/A
|
Naturally
occurring organic materials |
|
pH
|
N
|
7.4 |
6.9/7.7
|
STD
unit |
6.5/8.5
|
N/A
|
N/A
|
Comparison
of “Alkalinity” & “Acidity” of water
|
|
Specific
Conductance |
N
|
450 |
320/2560
|
US
|
1600
|
N/A
|
N/A
|
Substances
that form ions when in water; seawater influence
|
|
Sulfate
|
N
|
39 |
20/120 |
ppm
|
500
|
N/A
|
N/A
|
Runoff, leaching from natural
deposits; industrial waste |
|
Total
Dissolved Solids (TDS) |
N
|
284
|
210/610
|
ppm
|
1000
|
N/A
|
N/A
|
Runoff,
leaching from natural deposits |
|
Foaming
Agents (MBAS) |
N
|
0.0005 |
N/D/0.020 |
ppb
|
500
|
N/A
|
N/A
|
Municipal
and industrial waste discharges |
ADDITIONAL CONSTITUENTS ANALYZED
| Constituent |
Violation
Y/N
|
Level
Detected
|
Range |
Unit
Measurement
|
MCL in CCR units
|
PHG
|
MCLG
or MRDLG |
Likely
Source of Contamination
|
| Calcium
|
N
|
60 |
30/120
|
ppm
|
N/A
|
N/A
|
N/A
|
Natural
in limestone, marble, chalk |
| Total
Hardness
CA
C03 |
N
|
187 |
95/330
|
ppm
|
N/A
|
N/A
|
N/A
|
Total
concentration of calcium and magnesium |
| Total
Alkalinity |
N
|
125 |
120/320
|
ppm
|
N/A
|
N/A
|
N/A
|
Bicarbonate
sand
hydroxide components in raw water |
| Bicarbonate
|
N
|
222
|
140/390
|
ppm
|
N/A
|
N/A
|
N/A
|
Bicarbonate
components in water |
| Magnesium
|
N
|
9 |
5.0/22.0
|
ppm
|
N/A
|
N/A
|
N/A
|
Metallic
chemical element in soil |
| Potassium
|
N
|
3
|
2.8/4.6
|
ppm
|
N/A
|
N/A
|
N/A
|
Nutritional
element in soil for humans |
| Sodium
|
N
|
32
|
15/99
|
ppm
|
N/A
|
N/A
|
N/A
|
Alkaline
element industrial and chemical manufacturing
|
UNREGULATED CONTAMINANTS
Unregulated contaminant monitoring helps
the EPA and the California Department of Health Services to
determine where certain contaminants occur and whether the
contaminants need to be regulated.
| Chemical |
Action Level
ppb |
Level Detected |
Range |
Health
Effects |
| Boron |
1000
|
87
|
N/D/270 |
The
babies of some pregnant women who drink water containing
boron in excess of the notification level may have an
increased risk of development effects based on studies
in laboratory animals. |
|
Chromium VI
(Hexavalent chromium)
|
N/A |
0.3 |
N/D/1.7 |
N/A
|
|
Vanadium |
0
|
4.2
|
N/D/4.6 |
The
babies of some pregnant women who drink water containing
vanadium in excess of the notification level may have
an increased risk of development effects based on studies
in laboratory animals. |
LEAD & COPPER
Lead and Copper Rules became effective
in 1993. The Company has performed six rounds of testing.
The last round was performed in 2006. Another round
is scheduled for July 2009. All samples are taken from
first draw of morning water. The first two rounds were
from 40 single-family residences with copper pipe with
lead solder installed since 1982. Due to favorable results
in earlier rounds, the 1997, 2000 and 2003 rounds included
only 20 single-family residences.
Because of the increase in our customer base, the 2006
round of testing required us to sample 30 single-family
residences.
| Contaminant |
90TH
Percentile |
Unit
Measurement |
MCL
In CCR Units |
PHG |
MCLG |
Likely Source of Contamination |
|
Lead
|
N/D
|
Ppb
|
AL
15 |
2
|
0
|
Internal
corrosion of household plumbing system, discharge industrial
mfg. erosion of natural deposits |
|
Copper
|
0.36
|
Ppb
|
AL
1300 |
170
|
1300 |
Internal
corrosion of household system, erosion of natural deposits
|
|
