HomeMy WebLinkAboutHirschdale 2016 CCR FinalTruckee Donner Public Utility District
2016 WATER QUALITY REPORT
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 attend
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 Donner
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- 3980.
For More Information:
➢ About this report or the water treatment
process, contact Truckee Donner Public
Utility District's Senior Water Quality
Technician, Julie Nelson at (530) 582-3926.
➢ About water conservation and efficiency, the
TDPUD has water conservation programs
that will help customers save water and save
money. Information can be found on the
TDPUD's website at www.tdpud.org or by
calling 530-587-3896.
TRUCKEE DONNER
Public Utility District
HIRSCHDALE
WATER SYSTEM
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For more information
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Este informe contiene informaci6n
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www.tdpud.org
Water Quality
Truckee Donner Public Utility District vigilantly
safeguards its mountain groundwater supplies. We are
able to report that the District has met the California
Department ofPublic Health drinking water standards.
This brochure is a snapshot of the quality of water
provided to customers for the 2016 calendar year.
Included in this document are details about where
your water comes from, what it contains, and how it
compares to State and USEPA Standards.
Truckee Donner Public Utility District is committed to
providing you with the information about your water
supply because customers who are well informed are
the District's best allies in supporting improvements
that are necessary to maintain the highest drinking
water standards.
Some people may be more vulnerable to
contaminants in drinking water than the general
population. Immuno-compromised persons such as
persons with cancer undergoing chemotherapy, people
who have undergone organ transplants, people with
HIV/AIDS or other immune system disorders, some
elderly individuals, and infants can be particularly at
risk from infections. These people should seek advice
about drinking water from their health care providers.
USEPA/Centers for Disease Control (CDC) guidelines
on appropriate means to lessen the risk of infection by
Cryptosporidium and other microbiological
contaminants are available from the Safe Drinking
Water Hotline at 1-800-426-4791.
Where Does Our Water Come From
The source of the drinking water served to our
Hirschdale customers comes froma well drawing from
a deep aquifer. We filter this water to remove iron,
manganese, and arsenic before delivering it to your tap.
Additionally, each month the system is sampled for
microbial quality. Because of natural filtration, the
groundwater aquifer is protected from surface water
contamination, giving us a high quality of drinking
water.
Source Water Assessment
A source water assessment has been completed for
the well serving the Hirschdale area. The well is
considered most vulnerable to the following activities
not associated with any detected contaminants: septic
systems, drinking water treatment plants, and
transportation corridors. A copy of the complete
assessment may be viewed at the Truckee Donner
Public Utility District located at 11570 Donner Pass
Road, Truckee, CA or by calling Brian Wright at (530)
582-3957.
No Cryptosporidium or Giardia
in District Water
You may have seen or heard news reports about Cryptosporidium and
Giardia, microscopic organisms that can enter surface waters from run-
off containing animal wastes. If ingested, Cryptospridium and Giardia
can cause diarrhea, fever and other gastro-intestinal symptoms. Because
Truckee Donner Public Utility District's water comes from deep wells
rather than surface water, it is almost impossible to have these
contaminants in the District's water supply.
Radon
Radon is a radioactive gas that you cannot see, taste, or smell. It is
found throughout the U.S. Radon can move up through the ground and
into a home through cracks and holes in the foundation. Radon can build
up to high levels in all types of homes. Radon can also get into indoor
air when released from tap water from showering, washing dishes, and
other household activities. Compared to radon entering the home through
soil, radon entering the home through tap water will in most cases be a
small source of radon in indoor air. Radon is a known human carcinogen.
Breathing air containing radon can lead to lung cancer. Drinking water
containing radon may also cause increased risk of stomach cancer. If you
are concerned about radon in your home, test the air in your home.
Testing is inexpensive and easy. You should pursue radon removal for
your home if the level of radon in your air is 4 picocuries per liter of air
(pCi/L) or higher. There are simple ways to fix a radon problem that are
not too costly. For additional information, call your State radon program
(1-800-745-7236), the EPA Safe Drinking Water Hotline (1-800-426-
4791), or the National Safety Council Radon Hotline (1-800-SOS-
RADON).
Lead
If present, elevated levels of lead can cause serious health problems,
especially for pregnant women and young children. Infants and young
children are typically more vulnerable to lead in drinking water than the
general population. It is possible that lead levels at your home may be
higher than at the other homes in the community as a result of materials
used in your home's plumbing. Lead in drinking water is primarily from
materials and components associated with service lines and home
plumbing. Truckee Donner Public Utility District is responsible for
providing high quality water, but cannot control the variety of materials
used in plumbing components. When your water has been sitting for
several hours, you can minimize the potential for lead exposure by
flushing your tap for 30 seconds to 2 minutes before using water for
drinking or cooking. Ifyou are concerned about lead in your water, you
may wish to have your water tested. Information on lead in drinking
water, testing methods, and steps you can take to minimize exposure is
available from the USEPA Safe Drinking Water Hotline (1-800-426-
4791) orathttp://www.epa.gov/safewater/lead.
The data in the tables on the following pages is from the most recent monitoring done in compliance
with California drinking water regulations. Some data maybe more than a year old.
TERMS USED IN THIS REPORT
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
drinking water below which there is no known
or expected risk to health. MCLGs are set by
the U.S. Environmental Protection Agency
(USEPA).
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.
Maximum Residual Disinfectant 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 Disinfectant 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.
Primary Drinking Water Standards (PDWS):
MCLs and MRDLs for contaminants that affect
health along with their monitoring and reporting
requirements, and water treatment requirements.
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.
Treatment Technique (TT): A required process
intended to reduce the level of a contaminant in
drinking water.
Regulatory Action Level (AL): The concentration
of a contaminant which, if exceeded, triggers
treatment or other requirements that a water system
must follow.
Variances and Exemptions: State Board
permission to exceed an MCL or not comply with a
treatment technique under certain conditions.
ND: not detectable at testing limit
ppm: parts per million or milligrams per liter (mg/L)
ppb: parts per billion or micrograms per liter (µg/L)
ppt: parts per trillion or nanograms per liter (ng/L)
ppq: parts per quadrillion or picogram per liter
(pg/L)
pCi/L: picocuries per liter (a measure of radiation)
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 include:
• 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 be naturally -occurring or result from
urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production,
mining, or farming.
• Pesticides and herbicides, that may come from a variety of sources such as agriculture, urban
stormwater runoff, and residential uses.
• Organic chemical contaminants, including synthetic and volatile organic chemicals, that are by-
products of industrial processes and petroleum production, and can also come from gas stations,
urban stormwater runoff, agricultural application, and septic systems.
• Radioactive contaminants, that can be naturally -occurring or be the result of oil and gas production
and mining activities.
TABLE
1 — SAMPLING
RESULTS SHOWING
THE DETECTION OF COLIFORM BACTERIA
Microbiological
Highest No.
No. of months in
MCL
MCLG
Typical Source of Bacteria
Contaminants
of Detections
violation
More than 1 sample in
Total Coliform Bacteria
0
0
a month with a
0
Naturally present in the environment
detection
— DISINFECTION
BY-PRODUCT
Contaminant
No. Samples,
Average
Range
MCL (MRDL)
MCLG
Typical Source of Contaminant
Frequency
Level
(MRDLG)
Chlorine Residual (ppm)
1 per month
0.52
0.43-
4
4
Drinking water disinfectant added for
0.58
treatment
Total Trihalomethanes
1 on
30
N/A
80
N/A
By-product of drinking water
(ppb)
8/10/16
disinfection
Haloacectic Acids (ppb)
1 on
9.6
N/A
60
N/A
By-product of drinking water
8/10/16
disinfection
SYSTEM CUSTOMER TAP
SAMPLING
FOR LEAD AND COPPER
90thNo.
No. of
sites
Lead and Copper
Date Last
samples
percentile
exceeding
AL
PHG
Typical Source of Contaminant
Sampled
level
collected
AL
detected
Internal corrosion of household water
Lead (ppb)
08/10/16
5
1.5
0
15
0.2
plumbing systems; discharges from
industrial manufacturers; erosion of
natural deposits
Internal corrosion of household
Copper (ppm)
08/10/16
5
0.074
0
1.3
0.3
plumbing systems; erosion of natural
deposits; leaching from wood
preservatives
TABLE
4 — SAMPLING RESULTS FOR SODIUM AND HARDNESS
Chemical or Constituent
Date Last
Level
Range of Detections
MCL
PHG
Typical Source of Contaminant
(reporting units)
Sampled
Detected
(MCLG)
Sodium (ppm)
2016
43
N/A
N/A
N/A
Salt present in the water and is generally
naturally occurring
Sum of polyvalent cations present
Hardness (as CaCO3) (ppm)
2016
91
N/A
N/A
N/A
in the water, generally magnesium and
calcium, and are usually naturally
occurring
NREGULATED COMPOUND
Chemical or Constituent
(reporting units)
Date Last
Sampled
Level Detected
Range of
Detections
MCL
PHG
(MCLG)
Typical Source of Contaminant
Alkalinity (as CaCO3) (ppm)
2016
150
N/A
N/A
N/A
Erosion of natural deposits
Bicarbonate Alkalinity (as
HCO3) (ppm)
2016
180
N/A
N/A
N/A
Leaching of natural deposits
Calcium (ppm)
2016
15
N/A
N/A
N/A
Erosion of natural deposits
Magnesium (ppm)
2016
13
N/A
N/A
N/A
Erosion of natural deposits
Potassium (ppm)
2016
7.4
N/A
N/A
N/A
Erosion of natural deposits
TABLE 6 — DETECTION OF CONTAMINANTS
WITH A PRIMARY DRINKING WATER STAND
Chemical or Constituent
Date Last
Range of
PHG
Level Detected
MCL
Typical Source of Contaminant
(reporting units)
Sampled
Detections
(MCLG)
Inorganic Contaminants
Arsenic (ppb)
2016
4.2
N/D-6.6
10
0.004
Erosion of natural deposits
Barium (ppm)
2016
74
N/A
1000
2000
Erosion of natural deposits
Fluoride (ppm)
2016
0.09
N/A
2
1
Erosion of natural deposits
Turbidity (NTU) 2016 2.30 N/A 5 5
Soil runoff
Radioactive Contaminants 66,
Gross Alpha Particle
2014
N/D
N/D
15
0
Erosion of natural deposits
Activity (pCi/L)
Radon (pCi/L)
2005
570
N/A
N/A*
N/A*
Erosion of natural deposits
*Note
The State of California does not have an MCL for Radon. The EPA has an advisory MCL of 4000 pCi/L
for Radon.
TABLE 7 —
DETECTION OF CONTAMINANTS WITH A SECONDARY DRINKING WATER STANDA
Chemical or Constituent
Date Last
Range of
PHG
Level Detected
MCL
Typical Source of Contaminant
(reporting units)
Sampled
Detections
(MCLG)
Chloride (ppm)
2016
6
N/A
250
N/A
Leaching of natural deposits
Iron (ppb)
2016
90
N/A
300
N/A
Leaching of natural deposits
Manganese (ppb)
2016
5.90
N/A
50
N/A
Leaching of natural deposits
pH
2O16
8.0
7.7 - 8.3
6.5 - 8.5
N/A
Erosion of natural deposits
Specific Conductance
Substances that form ions when in
2016
350
N/A
1600
N/A
(µS/cm)
water.
Sulfate
2016
14
N/A
250
N/A
Leaching of natural deposits
Total Dissolved Solids
2016
260
N/A
500
N/A
Leaching of natural deposits
(ppm)