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Este informe contiene informaci6n
muy importante sobre su agua
potable. Traduzcalo 6 hable con
alguien que to entienda bien.
Customer Views Are Welcome
If you are interested in participating in the
decision -making process of the Truckee Donner
Public Utility District, you are welcome to at-
tend Board meetings.
The Board of Directors meet at 6:00 PM on
the first and third Wednesday of each month in
the TDPUD Board room located at 11570 Don-
ner Pass Road, Truckee, California. Agendas
for upcoming meetings may be obtained on our
website at ww.tdpud.org or from the Deputy
District Clerk's office, (530) 582-3909.
For More Information
• About this report or the water treatment pro-
cess, contact Truckee Donner Public Utility
District's Senior Water Quality Tech, Paul
Rose at (530) 582-3926.
About group or class presentations, contact
the Truckee Donner Public Utility District at
(530) 587-3896.
About water conservation and efficiency, the
TDPUD has new water conservation pro-
grams that will help customers save water
and save money. Information can be found
on the TDPUD's website at www.tdpud.org
or contact TDPUD's Conservation Depart-
ment at (530) 582-3931.
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2011 Water Quality
Report
HIRSCHDALE
WATER SYSTEM
# 2910010
I N DI DXKIJLTJ I MOO 1
The data presented in this table is from the most recent monitoring done in compliance with
regulations. Some data may be more than a year old.
Primary contaminants (PDWS)
MCL
PHG (MCLG)
Hirschdale Water
Average
Range of Detection
Violation
Major Origins in Drinking Water
Arsenic (ppb)
10
0.004
2.4
N/D - 5.1
NO
Barium (ppm)
1
2
0.11
1 0.11
NO
Erosion of natural deposits
Fluoride (ppm)
2
1
0.12
0.12
NO
Regulated Contaminants with Secondary MCLs (a) (SDWS)
Chloride (ppm)
500
500
8
8
NO
Sulfate (ppm)
500
500
14
14
NO
Total Dissolved Solids (ppb)
1000
1000
250
250
NO
Leaching from natural
deposits
Iron (ppm)
0.3
0.3
N/D
N/D
NO
Manganese (ppb)
50
50
N/D
N/D
NO
Color (ACU)
15
15
N/D
N/D
NO
Naturally -occurring organic
materials
Specific Conductance (µS/cm)
1600
1600
300
300
NO
Substances that form ions when in
water
pH
6.5 - 8.5
j 6.5 - 8.5
j 8
8
NO
Potassium (ppm)
N/A
N/A
5.5
5.5
N/A
Erosion of natural deposits
Unregulated General Minerals
Sodium (ppm)
N/A
N/A
29
29
N/A
Total Alkalinity (ppm)
N/A
N/A
130
130
N/A
Hardness as (CaCO3) (ppm)
N/A
N/A
89
89
N/A
Erosion of natural deposits
Calcium (ppm)
N/A
N/A
15
15
N/A
Magnesium (ppm)
N/A
N/A
13
13
N/A
Disinfection MRDL MRDLG
Chlorine (ppm)
4
4
0.66
0.28 - 0.86
NO
Drinking water disinfectant added for
treatment
Disinfection Byproducts MCL PHG (MCLG)
Sample Date
Total Trihalomethanes (ppb)
80
0
19
19
08/04/2011
NO
By-product of drinking water
Haloacetic Acids (ppb)
60
0
9.2
9.2
08/04/2011
NO
disinfection
Radionuclides MCL MCLG
Radon (pCi/L)
N/A
N/A
570
570
N/A
Erosion of natural deposits
Microbial Contaminants MCL
Total Coliform Bacteria
0
> Than 1 positive sample per month
NO
Naturally present in the environment
Copper / Lead
AL
MCLG
Hirschdale Water
90th percentile value
# of Sites
Sampled
# of Sites that Exceeded
Action Level
Violation
Copper (ppm)
1.3
0.17
0.074
5
0
NO
Corrosion of household plumbing
Lead (ppb)
15
2
1
5
1
NO
system. Flushing prior to use
recommended
Arsenic above 5 ppb up to and including 10 ppb: While your drinking water meets
the current USEPA standard for arsenic, it does contain low levels of arsenic. The arse-
nic standard balances the current understanding of Arsenic from drinking water. The
USEPA continues to research the health effects of low levels of arsenic, which is a min-
eral known to cause cancer in humans at high concentrations and is linked to other health
effects such as skin damage and circulatory problems.
GENERAL INFORMATION:
The sources of drinking water (both tap water and bottled water) include rivers, lakes,
streams, ponds, reservoirs, springs and wells. As water travels over the surface of the
land or through the ground, it dissolves naturally occurring minerals and, in some cases,
radioactive material, and can pick up substances resulting from the presence of animals
or from human activity.
Contaminants that may be present in source water:
• Microbial contaminants, such as viruses and bacteria, that may come from sewage
treatment plants, septic systems, agricultural livestock operations and wildlife.
• Inorganic contaminants, such as salts and metals, that can occur naturally or result
from urban storm -water runoff, industrial or domestic wastewater discharges, oil and
gas production, mining or farming.
• Pesticides and herbicides, which may come from a variety of sources such as agri-
culture, urban Storm -water runoff and residential uses.
• Organic chemical contaminants, including synthetic and volatile organic chemi-
cals, that are byproducts of industrial processes and petroleum production, and can
also come from gas stations, urban storm -water runoff and septic systems.
• Radioactive contaminants, which can be naturally occurring or be the result of oil
and gas production and mining activities.
In order to ensure that tap water is safe to drink, the U.S. Environmental Protection
Agency (USEPA) and the State Department of Public Health (Department) prescribe
regulations that limit the amount of certain contaminants in water provided by public
water systems. Department regulations also establish limits for contaminants in bottled
water that must provide the same protection for public health.
Drinking water, including bottled water, may reasonably be expected to contain at least
small amounts of some contaminants. The presence of contaminants does not necessari-
ly indicate that water poses a health risk. More information about contaminants and po-
tential health effects can be obtained by calling the USEPA's Safe Drinking Water Hot-
line at 1-800-426-4791 or at http://water.epa.gov/drink/indgx.cfm.
TABLE DEFINITIONS:
Detected Compounds: The State allows us to monitor for some contaminants less than
once per year because the concentrations of these contaminants do not change fre-
quently. Some of our data, though representative, are more than one year old. Not
listed are the hundreds of other compounds for which we tested that were not detected.
Regulated Contaminants with Secondary MCLs (a) - There are no PHGs, MCLGs,
or mandatory standard health effects language for these constituents because secondary
MCLs are set on the basis of aesthetics.
Maximum Contaminant Level (MCL) - The highest level of a contaminant that is
allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as
is economically and technologically feasible. Secondary MCLs are set to protect the
odor, taste and appearance of drinking water.
Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drink-
ing water below which there is no known or expected risk to health. MCLGs are set by
the U.S. Environmental Protection Agency.
Public Health Goal (PHG) - The level of a contaminant in drinking water below
which there is no known or expected risk to health. PHGs are set by the California
Environmental Protection Agency.
Primary Drinking Water Standards (PDWS)- MCLs and MRDLs for contaminants
that affect health along with their monitoring and reporting requirements, and water
treatment requirements.
Maximum Residual Disinfectant Level (MRDL) - The level of a disinfectant added
for water treatment that may not be exceeded at the consumer's tap.
Maximum Residual Disinfectant Level Goal (MRDLG) - The level of a disinfectant
added to water treatment below which there is no known or expected risk to health.
MRDLGs are set by the U.S. Environmental Protection Agency.
Secondary Drinking Water Standards (SDWS): MCLs for contaminants that affect
taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not
affect the health at the MCL levels.
Radiochemical Parameters —Compounds found in drinking water which emit radia-
tion.
Microbial Parameters —Disease -causing organisms that, at certain levels, may be
harmful. Additional information about Cryptosporidium and Giardia is supplied in this
report.
Unregulated Compounds Analyzed— Unregulated compounds that the Truckee
Donner Public Utility District has tested for. These compounds are not known to be
associated with adverse health effects.
TABLE KEY
ppm—Parts per million, or milligrams per liter (mg/L) pCi/L (Picocuries per Liter) - A measure of radioactivity.
ppb—Parts per billion, or micrograms per liter (ug/L) > - Greater than
µS/cm—Micro Siemens per centimeter N/A —Not Applicable
ACU (Apparent Color Unit) - A measure of color in drinking water.