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Report Date: |
May 2009 |
We test the drinking water quality for many constituents as required by
state and federal regulations. This
report shows the results of our monitoring for the period of January 1 -
December 31, 2008.
Este informe contiene información
muy importante sobre su agua potable.
Tradúzcalo ó hable con alguien que lo entienda bien.
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Type of water source(s) in use: |
Springs |
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Name & location of source(s): |
McKenzie Spring and West Stream located
to the westerly property boundary. |
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Drinking Water Source Assessment
information: |
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A source water assessment has been completed for
the McKenzie Creek-raw water serving the Whitehawk Ranch Mutual Water
Company. The source is considered most vulnerable to the following activities
not associated with contaminants detected in the water supply: Surface Water – streams / lakes / rivers |
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Time and place of regularly scheduled board meetings for public
participation: |
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Board Meetings are held on the Monday
before the second Tuesday of each month at 4:30 p.m. at the Whitehawk Ranch
Community Center, 1127 Whitehawk Drive Clio, CA 96106 (November through April
meeting time changes to 11:30 a.m.) |
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For more information, contact: |
Tom Vannoy, Manager |
Phone: |
(530) 836-4066 |
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TERMS USED IN THIS REPORT: |
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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 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 for water
treatment below which there is no known or expected risk to health. MRDLGs are set by the U.S. 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. 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: Department
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 (ug/L) ppt: parts per trillion or nanograms per liter (ng/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 byproducts 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.
In order to ensure that tap water is safe to drink, the 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 provide the same protection for public
health.
Tables 1, 2,
3, 4, and 5 list all of the drinking water contaminants that were detected
during the most recent sampling for the constituent. The presence
of these contaminants in the water does not necessarily indicate that the water
poses a health risk. The Department
allows us to monitor for certain contaminants less than once per year because
the concentrations of these contaminants do not change frequently. Some of the data, though representative of
the water quality, are more than one year old.
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Table 1 - sampling results showing the detection of coliform bacteria |
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Microbiological Contaminants (to be completed only if there was a detection of
bacteria ) |
Highest No. of detections |
No. of months in violation |
MCL |
MCLG |
Typical Source of Bacteria |
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Total Coliform Bacteria |
(In a mo.) |
0 |
More than 1 sample in a
month with a detection |
0 |
Naturally present in
the environment |
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Fecal Coliform or E.
coli |
(In the year) |
0 |
A routine sample and a
repeat sample detect total coliform and either sample also detects fecal
coliform or E. coli |
0 |
Human and animal fecal
waste |
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Table 2 - sampling results showing the detection of Lead and copper |
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Lead and Copper (to be completed only
if there was a detection of lead or copper in the last sample set) |
No. of samples collected |
90th percentile level
detected |
No. sites exceeding AL |
AL |
PHG |
Typical Source of Contaminant |
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Lead (ppb) |
5 |
1 |
0 |
15 |
2 |
Internal corrosion of
household water plumbing systems; discharges from industrial manufacturers;
erosion of natural deposits |
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Copper (ppm) |
5 |
0.135 |
0 |
1.3 |
0.17 |
Internal corrosion of
household plumbing systems; erosion of natural deposits; leaching from wood
preservatives |
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TAble 3 - sampling results for sodium and hardness |
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Chemical or Constituent (and reporting units) |
Sample Date |
Level Detected |
Range of Detections |
MCL |
PHG (MCLG) |
Typical Source of Contaminant |
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Sodium (ppm) |
1996 |
4.8 |
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none |
none |
Generally found in
ground & surface water |
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Hardness (ppm) |
2003 |
91 |
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none |
none |
Generally found in
ground & surface water |
*Any violation of an MCL or AL is marked with an
asterisk. Additional information regarding
the violation is provided later in this report.
TAble 4 -
detection of contaminants with a Primary Drinking Water Standard |
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Chemical or Constituent |
Sample Date |
Level Detected |
Range of Detections |
MCL [MRDL] |
PHG (MCLG) [MRDLG] |
Typical Source of Contaminant |
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Nitrate |
12/08 |
ND |
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45 ppm |
45 ppm |
Runoff and leaching from fertilizer use; leaching
from septic tanks and sewage; erosion of natural deposits |
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TTHM (Total
Trihalomethanes) |
9/07 |
6.6 ppb |
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80 ppb |
N/A |
By-product of drinking water chlorination |
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Gross
Alpha |
2001/02 |
3.87 pCi/L |
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15 pCi/L |
0 |
Erosion of natural deposits |
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Combined Radium 228 |
2007 |
0.0961 pCi/L |
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5 pCi/L |
(0) |
Erosion of natural deposits |
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Arsenic |
11/2007 |
ND |
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10(b) |
0.004 ppb |
Erosion of natural deposits; runoff from orchards;
glass and electronics production wastes |
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TAble 5 -
detection of contaminants with a Secondary Drinking Water Standard |
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Chemical
or Constituent |
Sample Date |
Level Detected |
Range of Detections |
MCL |
PHG (MCLG) |
Typical
Source of Contaminant |
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NA |
NA |
NA |
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TABLE 6 - DETECTION OF UNREGULATED
CONTAMINANTS |
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Chemical or Constituent (and reporting units) |
Sample Date |
Level Detected |
Notification |
Health Effects Language |
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NA |
NA |
NA |
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*Any violation of an MCL, MRDL, or TT is
asterisked. Additional information
regarding the violation is provided later in this report.
Additional General Information on Drinking Water
Drinking water, including bottled water, may
reasonably be expected to contain at least small amounts of some
contaminants. The presence of
contaminants does not necessarily indicate that the 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 (1-800-426-4791).
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, persons who have
undergone organ transplants, people with HIV/AIDS or other immune system disorders,
some elderly, 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 microbial contaminants are available from the Safe Drinking Water
Hotline (1-800-426-4791).
Summary
Information for Contaminants Exceeding an MCL, MRDL, or AL, or a Violation of
Any Treatment Technique or Monitoring and Reporting Requirement
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We are required to test once monthly for Coliform
Bacteria (an indicator that drinking water meets health standards) by the
Plumas County Department of Environmental Health. During the month of March
2008 our sampling laboratory did not monitor for Coliform bacteria and
therefore we did not meet our Monitoring Requirements. The Mutual Water
Company posted a “Drinking Water Notice” and did follow up testing in April. |
For Systems Providing Surface Water as a
Source Of Drinking Water:
(Refer
to page 1, “Type of water source in use” to see if your source of water is
surface water or groundwater)
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Table 7 - sampling
results showing TREATMENT OF SURFACE
WATER SOURCES |
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Treatment Technique (a) (Type
of approved filtration technology used) |
In
Line Filtration/ Disinfection |
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Turbidity
Performance Standards (b) (that
must be met through the water treatment process) |
Turbidity of
the filtered water must: 1 – Be less than or equal to .5 NTU in 95% of measurements in a month. 2 – Not exceed 1.0 NTU for more than eight consecutive hours. 3 – Not exceed 5.0 NTU at any time. |
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Lowest monthly
percentage of samples that met Turbidity Performance Standard No. 1. |
100% |
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Highest single
turbidity measurement during the year |
.09 NTU |
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Number of violations of
any surface water treatment requirements |
0 |
(a) A required process intended to reduce the
level of a contaminant in drinking water.
(b) Turbidity
(measured in NTU) is a measurement of the cloudiness of water and is a good
indicator of water quality and filtration performance. Turbidity results which meet performance
standards are considered to be in compliance with filtration requirements.
*
Any violation of a TT is marked with an asterisk. Additional information regarding the
violation is provided earlier in this report.
Summary
Information for Surface Water Treatment
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NO VIOLATIONS |