HomeMy WebLinkAbout16-1 Attachments2014 WATER QUALITY REPORT
Este informe
contiene
información muy
importante sobre
su agua
potable.
Tradúzcalo ó hable
con alguien que lo
entienda bien.
Where Does
Our Water
Come From?
Drinking water served
to Truckee Donner Public
Utility District customers in
the Truckee system is
groundwater from 12 deep
wells.
Each week the system
is sampled for microbial
quality. Because of natu-
ral filtration, the ground-
water aquifer is protected
from surface contamina-
tion. This gives us high
quality water.
Truckee Donner Public Utility District (TDPUD) vigilantly safeguards its mountain groundwater supplies
Last year, your tap water met all EPA and State drinking water
health standards. This brochure is a snapshot of the quality of wa-
ter provided to customers for the 2014 calendar year. Included in
this pamphlet are details about where your water comes from, what
it contains, and how it compares to State and USEPA Standards.
TDPUD 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 neces-
sary to maintain the highest drinking water standards.
For More Information
About this report or the water treatment process, contact Truck-
ee Donner Public Utility District’s Senior Water Quality Techni-
cian, Julie Nelson at (530) 582-3926.
About water conservation and efficiency, the TDPUD has new
water conservation programs that will help customers save wa-
ter and save money. Information can be found on the TDPUD’s
website at www.tdpud.org or by calling (530) 582-3931.
Customer Views Are Welcome
If you are interested in participating in the decision-making pro-
cess 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, Califor-
nia. Agendas for upcoming meetings may be obtained on our web-
site at www.tdpud.org or from the Deputy District Clerk ’s office,
(530) 582-3980.
Truckee Main Water System #2910003
Truckee Donner Public Utility District
TERMS USED IN THIS REPORT
Detected Compounds: The State allows us to monitor for some contaminants less than once per year because the concen-
trations of these contaminants do not change frequently. 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 lan-
guage 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 t he
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.
Public Health Goal (PHG): The level of a contaminate 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 monitor-
ing and reporting requirements, and water treatment requirements.
Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water. There is con-
vincing 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 of health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contam inants.
Secondary Drinking Water Standards (SDWS): MCLs for contaminants that affect taste, odor, or appearance of the drink-
ing water. Contaminants with SDWSs do not affect the health a the MCL levels.
Regulatory Action Level (AL) : The concentration of a contaminant which, if exceeded, triggers treatment or other requirements
which a water system must follow.
Radiochemical Parameters—Compounds found in drinking water which emit radiation.
Microbial Parameters—Disease-causing organisms that, at certain levels, may be harmful. Additional information about Cryptos-
poridium and Giardia is supplied in this report.
Unregulated Compounds Analyzed—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
N/D– not detectable at testing limit ppm—Parts per million, or milligrams per liter (mg/L)
ppb—Parts per billion, or micrograms per liter (ug/L) μS/cm—Micro Siemens per centimeter
> - Greater than pCi/L (Picocuries per Liter) - A measure of radioactivity.
N/T– not tested N/A—Not Applicable
ACU (Apparent Color Unit) - A measure of color in drinking water.
Arsenic above 5 ppb up to 10 ppb: While
your drinking water meets the current Federal
and State standards it does contain low levels
of arsenic. The standard balances the current
understanding of arsenic’s possible health ef-
fects against the costs of removing arsenic from
drinking water. The USEPA continues to re-
search the health effects of low levels of arse-
nic, which is a mineral known to cause cancer
in humans at high concentrations and is linked
to other health effects such as skin damage and
circulatory problems.
* Glenshire Drive Well: The Arsenic test
results shown for the Glenshire Drive Well is a
seasonal weighted average. The Glenshire
Drive Well water is blended with the Prosser
Village Well and the Old Greenwood Well prior
to any connection to the consumer. The well
was in use from May to November in 2014.
The Arsenic test results at the blending point
ranged from a low of 5.0 ppb to a high of 6.0
ppb with an average of 5.7 ppb.
What is the Third Unregulated Contaminant Monitoring Rule (UCMR3)?
The TDPUD 2014 Water Quality Report includes a new group of water qual-
ity testing data. This data represents the results of water quality sample collec-
tion and testing for contaminants that are currently unregulated by the EPA and
are not known to pose risks to public health.
Under the 1996 amendments to the Federal Safe Drinking Water Act, the
U.S. Environmental Protection Agency is required once every five years to is-
sue a new list of up to 30 unregulated contaminants for which public water sys-
tems must monitor.
The Third Unregulated Contaminant Monitoring Rule was signed by former
EPA Administrator Lisa P. Jackson on April 16, 2012. The EPA, the State of
California, independent laboratories and public water systems are all participat-
ing in the testing for UCMR3 in various capacities.
The intent of this rule is to provide baseline occurrence data that the EPA
can combine with toxicological research to make decisions about potential fu-
ture drinking water regulations. We are currently going through the third round
of this contaminant testing. This current round of testing helps determine
whether or not these contaminants are found in drinking water, at what levels
they are found, and in which parts of the country. Depending on how prevalent
the contaminants are and at what levels they are found, EPA may conduct fur-
ther research to determine whether or not to begin regulating some or all of
them.
The TDPUD Water Utility, along with all public water systems serving more
than 10,000 people is participating in some portion of the testing. The testing is
taking place between January 2013 and December 2015.
You can contact the TDPUD Senior Water Quality Technician/Inspector to
ask about our participation in UCMR3. Additional information and helpful links
to water quality information can be found on our website: www.TDPUD.org
Source Water
Assessment
A source water assessment was prepared in
2002 for the wells serving the Truckee area. The
wells are considered most vulnerable to the fol-
lowing activities not associated with any detected
contaminants: sewer collection systems, utility
stations, railroads, and herbicide use. A copy of
the complete assessment may be viewed at the
Truckee Donner Public Utility District office locat-
ed at 11570 Donner Pass Road, Truckee, CA or
by calling Brian Wright at (530) 582-3957.
Some people may be more vulnerable to con-
taminants in drinking water than the general pop-
ulation. 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, and infants can be par-
ticularly 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 Cryptos-
poridium and other microbial contaminants are
available from the Safe Drinking Water Hotline at
1-800-426-4791.
Drinking water, including bottled wa-
ter, may reasonably be expected to contain at
least small amounts of some contaminants. The
presence of contaminants does not necessarily
indicate that water poses a health risk. More
information about contaminants and potential
health effects can be obtained by calling the
USEPA’s Safe Drinking Water Hotline at 1-800-
426-4791 or at http: water.epa.gov/drink/
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 show-
ering, 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. Lead in drinking water is primarily from ma-
terials 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 cook-
ing. If you 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 Safe Drinking Water Hotline or at http://
www.epa.gov/safewater/lead.
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, Cryptosporidium and Giardia can cause diarrhea, fever and other
gastro-intestinal symptoms. Because the 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.
GENERAL INFORMATION
The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs a nd 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 live-
stock 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 agricultural, urban storm -water 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
storm-water 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.
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 sys tems. Depart-
ment regulations also establish limits for contaminants in bottled water that must provide the same protection for public health.
Primary Contaminants (PDWS) MCL PHG (MCLG) Airport Well Northside Well Martis Valley Well Southside Well #2 “A” Well Glenshire Dr Well Sanders Well Prosser Annex Well Prosser Heights Well Well 20 Prosser Village Well Old Greenwood Well Violation Major Origins in Drinking Water Year Sampled 2014 2012 2014 2013 2012 2014 2012 2014 2013 2012 2011 2012 Arsenic (ppb) 10 0.004 9.9 N/D 9.9 N/D N/D 5.7* 8.9 N/D N/D N/D N/D 2.5 NO Erosion of Natural Deposits Year Sampled 2014 2014 2011 2007 2006 2011 2009 2008 2007 2006 2010 2012 Flouride (ppm) 2 1 <0.1 N/D N/D N/D N/D N/D N/D N/D N/D N/D 0.11 N/D NO Year Sampled 2014 2013 2014 2014 2014 2014 2014 2014 2014 2014 2014 2014 Nitrate (asNO,) (ppm) 45 45 1.9 N/D 0.44 4.9 N/D 1.6 0.87 N/D 0.55 0.17 0.96 0.9 NO Leaching of natural deposits, sewage, runoff from fertilizer use Radionuclides Year Sampled 2004 2004 Radon (pCi/L) N/A N/A 560 530 N/A Erosion of natural deposits Regulated Contaminants with Secondary MCLs (a) (SDWS) Year Sampled 2008 2014 2011 2007 2006 2011 2009 2008 2007 2006 2010 2012 Color (ACU) 15 15 N/D N/D N/D N/D N/D N/D N/D N/D 3 N/D 5 1 NO Natural-occurring organic materials Odor 3 3 2 N/D N/D 1 1 N/D 1 1 1 1 N/D 1 NO Iron (ppb) 300 300 N/D 49 6 N/D N/D N/D N/D N/D N/D N/D N/D N/D NO Leaching from natural deposits Chloride (ppm) 250 250 5.5 1.3 7.1 5.7 N/D 12 53 N/D N/D N/D 6.4 3.5 NO Copper (ppm) 1 1 N/D 0.0025 87 0.04 N/D N/D 0.28 0.02 N/D N/D N/D 3.5 NO Manganese (ppb) 50 50 N/D N/D 6.4 N/D N/D N/D N/D N/D N/D N/D N/D N/D NO Total Dissolved Solids (ppm) 1000 1000 126 120 120 112 68 140 230 112 110 110 120 93 NO Sulfate (ppm) 500 500 4.1 N/D 3.5 1.3 N/D 6.7 16 N/D N/D N/D 1.4 1.9 NO Specific Conductance (µS/cm) 1600 1600 187 180 160 160 107 200 360 166 166 166 180 167 NO Substances that form ions when in water pH N/A N/A 8.1 8.3 8.1 7.1 7.4 8.3 8 8.1 8.3 8.1 8.2 8 N/A Leaching of natural deposits Unregulated General Minerals Year Sampled 2008 2014 2011 2007 2006 2011 2009 2008 2007 2006 2010 2012 Hardness (ppm) N/A N/A 67 77 57 92 44 72 97 41 72 56 55 62 N/A Leaching of natural deposits Sodium (ppm) N/A N/A 10 7.7 9.3 4.9 3.5 12 29 15 6.4 12 16 9 N/A Unregulated Contaminant Monitoring Rule 3 2nd Round—April 2014 Chromium (total) (ppb) 1 N/D 0.76 0.77 N/D 0.73 1.4 0.31 076 0.31 0.71 0.7 N/A Cobalt (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A DETECTED COMPOUNDS The data presented in this table is from the most recent monitoring done in compliance with regulations. Some data is more than a year old.
Cobalt (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Molybdenum (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Stronitium (ppb) 140 87 110 370 100 120 240 120 170 160 130 120 N/A Vanadium (ppb) 5.4 1 5.4 1.2 1.3 4.7 3.5 4.0 4.0 2.0 2.4 3 N/A Chromium-6 (ppb) 1.1 1.4 0.95 0.8 0.089 0.53 0.53 0.43 0.95 0.37 0.82 .76 N/A Chlorate (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A 1, 4-dioxane (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A 1, 1-dichloroethane (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A 1, 2, 3-trichloropropane (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A 1, 3-butadiene (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Bromochloroethane (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Bromoethane (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Chlorodifluoromethane (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Chloromethane (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Perfluoro-1 butanesulfonic acid (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Perfluoroheptanoic acid (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Perfluoro-1 hexanesulfonic acid (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Perfluoro-n-nonanoic acid (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Perfluorooctanoic acid (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Perfluoro octanesulfonic acid (ppb) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/A Microbial Contaminants MCL TDPUD System Highest Month Violation Major Origins in Drinking Water Total Coliform Bacteria > Than 2 positive samples or more than 5% positive samples per month 0.00% NO Naturally present in the environment Lead/Copper AL MCLG TDPUD Water System 90th Percentile Value # of Sites Sampled # of Sites that Exceeded Action Level Lead (ppb) 15 2 2 30 0 NO Corrosion of household plumb-ing systems. Flushing prior to use recommended Copper (ppm) 1.3 0.3 0.054 30 0 NO Disinfection Residual MRDL MRDLG Average Range for TDPUD Water System Chlorine (ppm) 4 4 0.41 0.35 — 0.72 NO Drinking Water Disinfectant added for treatment Disinfection Byproducts MCL PHG (MCLG) Average Range for TDPUD Water System Sample Date Total Trihalomethanes (ppb) 80 N/A 4.6 2.6-6.6 NO By-product of drinking water disinfection 8/5/2014
Water Quality Truckee Donner Public Utility District vigilantly safe-guards its mountain groundwater supplies. We are able to report that the District has met the California Department of Public Health drinking water standards. This brochure is a snapshot of the quality of water provided to customers for the 2014 calendar year. Includ-ed in this pamphlet 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 sup-ply because customers who are well informed are the District’s best allies in supporting improvements that are necessary to maintain the highest drinking water stand-ards. Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer under-going chemotherapy, people who have undergone organ transplants, people with HIV/AIDS or other immune sys-tem 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 microbiologi-cal 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 from a well drawing from a deep aquifer. We filter this water to remove iron, manga-nese, and arsenic before delivering it to your tap. Addi-tionally, 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. Visit Our Website www.tdpud.org
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, Julie
Nelson at (530) 582-3926.
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.
Truckee Donner Public Utility District
11570 Donner Pass Road
Truckee, CA 96161
No Cryptosporidium or Giardia in District Water You may have seen or heard news reports about Cryptosporidium and Gi-ardia, microscopic organisms that can enter surface waters from run-off con-taining animal wastes. If ingested, Cryptospridium and Giardia can cause diar-rhea, 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 contami-nants 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 prob-lem 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). Truckee Donner Public Utility District 11570 Donner Pass Road Truckee, CA 96161 TRUCKEE DONNER
Public Utility District
2014 Water Quality
Report
HIRSCHDALE
WATER SYSTEM
# 2910010
Este informe contiene información
muy importante sobre su agua
potable. Tradúzcalo ó hable con
alguien que lo entienda bien. 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 high-er than at the other homes in the communi-ty as a result of materials used in your home’s plumbing. Lead in drinking water is primarily from materials and compo-nents 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 com-ponents. 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. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, test-ing methods, and steps you can take to minimize exposure is available from the USEPA Safe Drinking Water Hotline (1-800-426-4791) or at http://www.epa.gov/safewater/lead.
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 nec-
essarily indicate that water poses a health risk. More information about contaminants
and potential health effects can be obtained by calling the USEPA’s Safe Drinking Water
Hotline at 1-800-426-4791 or at http://water.epa.gov/drink/index.cfm.
DETECTED COMPOUNDS 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.
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. N/D—Not detectable at testing limit
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
frequently. 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 contami-
nants 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 disinfect-
ant 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.
Primary contaminants (PDWS) MCL PHG
(MCLG)
Hirschdale Water
Average Range of Detection Violation Major Origins in Drinking Water Most Recent
Monitoring Date
Arsenic (ppb) 10 0.004 3.1 N/D - 9.0 NO
Erosion of natural deposits
2014
Barium (ppm) 1 2 0.11 0.11 NO 2011
Fluoride (ppm) 2 1 0.12 0.12 NO 2011
Radionuclides MCL MCLG
Radon (pCi/L) N/A N/A 570 570 N/A Erosion of natural deposits 2005
Regulated Contaminants with Secondary MCLs (a)
(SDWS)
Chloride (ppm) 500 500 8 8 NO
Leaching from natural deposits
2011
Sulfate (ppm) 500 500 14 14 NO 2011
Total Dissolved Solids (ppb) 1000 1000 250 250 NO 2011
Iron (ppb) 300 300 N/D N/D NO 2014
Manganese (ppb) 50 50 0.26 N/D—3.2 NO 2014
Color (ACU) 15 15 N/D N/D NO Naturally-occurring organic
materials 2011
Specific Conductance (μS/cm) 1600 1600 300 300 NO Substances that form ions when in
water 2011
pH 6.5 - 8.5 6.5 - 8.5 8 8 NO Erosion of natural deposits 2011
Potassium (ppm) N/A N/A 5.5 5.5 N/A 2011
Unregulated General Minerals
Sodium (ppm) N/A N/A 29 29 N/A
Erosion of natural deposits
2011
Total Alkalinity (ppm) N/A N/A 130 130 N/A 2011
Hardness as (CaCO3) (ppm) N/A N/A 89 89 N/A 2011
Calcium (ppm) N/A N/A 15 15 N/A 2011
Magnesium (ppm) N/A N/A 13 13 N/A 2011
Disinfection MRDL MRDLG
Chlorine (ppm) 4 4 0.58 0.42-0.75 NO Drinking water disinfectant added
for treatment 2014
Disinfection Byproducts MCL PHG
(MCLG) Sample Date
Total Trihalomethanes (ppb) 80 0 25 25 8/21/14 NO By-product of drinking water disin-
fection
2014
Haloacetic Acids (ppb) 60 0 10 10 8/21/14 NO 2014
Microbial Contaminants MCL
Total Coliform Bacteria 0 > Than 1 positive sample per month NO Naturally present in the environment 2014
Lead / Copper AL MCLG Hirschdale Water 90th
percentile value
# of Sites
Sampled
# of Sites that
Exceeded Action
Level
Violation
Lead (ppb) 15 2 N/D 5 0 NO 2012 Corrosion of household plumbing
system. Flushing prior to use
recommended Copper (ppm) 1.3 0.17 0.054 5 0 NO 2012