HomeMy WebLinkAbout20201942.tiffKEENESBURG TOWN OF 2020 Drinking Water Quality Report
Covering Data For Calendar Year 2019
Public Water System ID: CO0162438
RECEIVED
JUN 2 2 2020
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We are pleased to present to you this year's water quality report. Our constant goal is to provide you with a safe and dependable
supply of drinking water. Please contact MARK GRAY at 303-437-4970 with any questions or for public participation
opportunities that may affect water quality.
General Information
All 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 Environmental
Protection Agency's Safe Drinking Water Hotline (1-800-426-4791)
or by visiting epa.gov/ground-water-and-drinking-water.
Some people may be more vulnerable to contaminants in drinking
water than the general population. Immunocompromised 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 of infections. These people should seek advice
about drinking water from their health care providers. For more
information about contaminants and potential health effects, or to
receive a copy of the U.S. Environmental Protection Agency (EPA)
and the U.S. Centers for Disease Control (CDC) guidelines on
appropriate means to lessen the risk of infection by Cryptosporidium
and microbiological contaminants call the EPA Safe Drinking Water
Hotline at (1-800-426-4791).
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: viruses and bacteria that may come from
sewage treatment plants, septic systems, agricultural livestock
operations, and wildlife.
•Inorganic contaminants: salts and metals, which can be naturally -
occurring or result from urban storm water runoff, industrial or
domestic wastewater discharges, oil and gas production, mining, or
farming.
•Pesticides and herbicides: may come from a variety of sources,
such as agriculture, urban storm water runoff, and residential uses.
•Radioactive contaminants: can be naturally occurring or be the
result of oil and gas production and mining activities.
•Organic chemical contaminants: including synthetic and volatile
organic chemicals, which are byproducts of industrial processes and
petroleum production, and also may come from gas stations, urban
storm water runoff, and septic systems.
In order to ensure that tap water is safe to drink, the Colorado
Department of Public Health and Environment prescribes
regulations limiting the amount of certain contaminants in water
provided by public water systems. The Food and Drug
Administration regulations establish limits for contaminants in
bottled water that must provide the same protection for public
health.
Lead in Drinking Water
If present, elevated levels of lead can cause serious health problems
(especially for pregnant women and young children). It is possible
that lead levels at your home may be higher than other homes in the
community as a result of materials used in your home's plumbing. If
you are concerned about lead in your water, you may wish to have
your water tested. 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. Additional information on lead in drinking water, testing
methods, and steps you can take to minimize exposure is available
from the Safe Drinking Water Hotline (1-800-426-4791) or at
epa.gov/safewater/lead.
Source Water Assessment and Protection (SWAP)
The Colorado Department of Public Health and Environment may
have provided us with a Source Water Assessment Report for our
water supply. For general information or to obtain a copy of the
report please visit wqcdcompliance.com/ccr. The report is located
under "Guidance: Source Water Assessment Reports". Search the
table using 162438, KEENESBURG TOWN OF, or by contacting
MARK GRAY at 303-437-4970. The Source Water Assessment
Report provides a screening -level evaluation of potential
contamination that could occur. It does not mean that the
contamination has or will occur. We can use this information to
evaluate the need to improve our current water treatment capabilities
and prepare for future contamination threats. This can help us ensure
that quality finished water is delivered to your homes. In addition,
the source water assessment results provide a starting point for
developing a source water protection plan. Potential sources of
contamination in our source water area are listed on the next page.
Please contact us to learn more about what you can do to help
protect your drinking water sources, any questions about the
Drinking Water Quality Report, to learn more about our system, or
to attend scheduled public meetings. We want you, our valued
customers, to be informed about the services we provide and the
quality water we deliver to you every day.
KEENESBURG TOWN OF, PWS ID: CO0162438
(Lomni(3n cat. 0 n
7/01/20
cc' HLCmL/ TG)
6/26/20
2020 CCR Page 1 of
2020-1942
Our Water Sources
Sources (Water Type - Source Type)
Potential Source(s) of Contamination
HIGH SCHOOL WELL (Groundwater -Well)
WELL NO 11 LOST CREEK (Groundwater -Well)
NO 2 WELL SYPIAN (Groundwater -Well)
NO 4 WELL PARK (Groundwater -Well)
WELL NO 5 FLURRIES POND (Groundwater -Well)
7 WELL AT TANK SITE (Groundwater -Well)
Commercial/Industrial/Transportation, High Intensity
Residential, Low Intensity Residential, Row Crops, Fallow,
Small Grains, Road Miles
Terms and Abbreviations
• Maximum Contaminant Level (MCL) — The highest level of a contaminant allowed in drinking water.
• Treatment Technique (TT) — A required process intended to reduce the level of a contaminant in drinking water.
• Health -Based — A violation of either a MCL or TT.
• Non -Health -Based — A violation that is not a MCL or TT.
• Action Level (AL) — The concentration of a contaminant which, if exceeded, triggers treatment and other regulatory
requirements.
• 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 Contaminant Level Goal (MCLG) — The level of a contaminant in drinking water below which there is no
known or expected risk to health. MCLGs allow for a margin of safety.
• 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.
• Violation (No Abbreviation) — Failure to meet a Colorado Primary Drinking Water Regulation.
• Formal Enforcement Action (No Abbreviation) — Escalated action taken by the State (due to the risk to public health, or
number or severity of violations) to bring a non -compliant water system back into compliance.
• Variance and Exemptions (V/E) — Department permission not to meet a MCL or treatment technique under certain
conditions.
• Gross Alpha (No Abbreviation) — Gross alpha particle activity compliance value. It includes radium -226, but excludes
radon 222, and uranium.
• Picocuries per liter (pCi/L) — Measure of the radioactivity in water.
• Nephelometric Turbidity Unit (NTU) — Measure of the clarity or cloudiness of water. Turbidity in excess of 5 NTU is
just noticeable to the typical person.
• Compliance Value (No Abbreviation) — Single or calculated value used to determine if regulatory contaminant level
(e.g. MCL) is met. Examples of calculated values are the 90th Percentile, Running Annual Average (RAA) and Locational
Running Annual Average (LRAA).
• Average (x -bar) — Typical value.
• Range (R) — Lowest value to the highest value.
• Sample Size (n) — Number or count of values (i.e. number of water samples collected).
• Parts per million = Milligrams per liter (ppm = mg/L) — One part per million corresponds to one minute in two years or
a single penny in $10,000.
• Parts per billion = Micrograms per liter (ppb = ug/L) — One part per billion corresponds to one minute in 2,000 years,
or a single penny in $10,000,000.
• Not Applicable (N/A) — Does not apply or not available.
• Level 1 Assessment — A study of the water system to identify potential problems and determine (if possible) why total
coliform bacteria have been found in our water system.
• Level 2 Assessment — A very detailed study of the water system to identify potential problems and determine (if possible)
why an E. coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on
multiple occasions.
KEENESBURG TOWN OF, PWS ID: CO0162438 2020 CCR Page 2 of 7
Detected Contaminants
KEENESBURG TOWN OF routinely monitors for contaminants in your drinking water according to Federal and State laws. The
following table(s) show all detections found in the period of January 1 to December 31, 2019 unless otherwise noted. The State of
Colorado requires us to monitor for certain contaminants less than once per year because the concentrations of these contaminants
are not expected to vary significantly from year to year, or the system is not considered vulnerable to this type of contamination.
Therefore, some of our data, though representative, may be more than one year old. Violations and Formal Enforcement Actions, if
any, are reported in the next section of this report.
Note: Only detected contaminants sampled within the last 5 years appear in this report. If no tables appear in this section then no
contaminants were detected in the last round of monitoring.
Disinfectants Sampled in the Distribution System
TT Requirement: At least 95% of samples per period (month or quarter) must be at least 0.2 ppm OR
If sample size is less than 40 no more than 1 sample is below 0.2 ppm
Typical Sources: Water additive used to control microbes
Disinfectant
Name
Time Period
Results
Number of Samples
Below Level
Sample
Size
TT
Violation
MRDL
Chlorine
December, 2019
Lowest period percentage of samples
0
3
No
4.0 ppm
meeting TT requirement: 100%
Lead and Copper Sampled in the Distribution System
Contaminant
Time
90th
Sample
Unit of
90th
Sample
90th
Typical Sources
Name
Period
Percentile
Size
Measure
Percentile
Sites
Percentile
AL
Above
AL
AL
Exceedance
Copper
07/10/2019
to
09/12/2019
0.82
11
ppm
1.3
0
No
Corrosion of
household plumbing
systems; Erosion of
natural deposits
Lead
07/10/2019
to
09/12/2019
3.8
11
ppb
15
0
No
Corrosion of
household plumbing
systems; Erosion of
natural deposits
Disinfection Byproducts Sampled in the Distribution System
Name
Year
Average
Range
Low — High
Sample
Size
Unit of
Measure
MCL
MCLG
MCL
Violation
Typical Sources
Total
Haloacetic
Acids
(HAM)
2019
8.72
3.5 to 15.9
8
ppb
60
N/A
No
Byproduct of drinking
water disinfection
KEENESBURG TOWN OF, PWS ID: CO0162438
2020 CCR Page 3 of 7
Disinfection Byproducts Sampled in the Distribution System
Name
Year
Average
Range
Low — High
Sample
Size
Unit of
Measure
MCL
MCLG
MCL
Violation
Typical Sources
Total
Trihalome
thanes
CITHM)
2019
64.69
39.7 to
118.9
8
ppb
80
N/A
Yes
Byproduct of drinking
water disinfection
Radionuclides Sampled at the Entry Point to the Distribution System
Contaminant
Name
Year
Average
Range
Low - High
Sample
_ Size
Unit of
Measure
MCL
MCLG
MCL
Violation
Typical Sources
Gross Alpha
2015
1.27
1.27 to 1.27
1
pCi/L
15
0
No
Erosion of
natural deposits
Combined
Radium
2015
0.9
0.9 to 0.9
1
pCi/L
5
0
No
Erosion of
natural deposits
Combined
Uranium
2015
8
7.6 to 8.4
2
ppb
30
0
No
Erosion of
natural deposits
Inorganic Contaminants Sampled at the Entry Point to the Distribution System
Contaminant
Name
Year
Average
Range
Low — High
Sample
Size
Unit of
Measure
MCL
MCLG
MCL
Violation
Typical Sources
Arsenic
2017
0.5
0 to 1
2
ppb
10
0
No
Erosion of natural
deposits; runoff
from orchards;
runoff from glass
and electronics
production wastes
Barium
2017
0.04
0.03 to 0.04
2
ppm
2
2
No
Discharge of
drilling wastes;
discharge from
metal refineries;
erosion of natural
deposits
Chromium
2017
2.5
0 to 5
2
ppb
100
100
No
Discharge from
steel and pulp
mills; erosion of
natural deposits
KEENESBURG TOWN OF, PWS ID: CO0162438
2020 CCR Page 4 of 7
Inorganic Contaminants Sampled at the Entry Point to the Distribution System
Contaminant
Name
Year
Average
Range
Low — High
Sample
Size
Unit of
Measure
MCL
MCLG
MCL
Violation
Typical Sources
Fluoride
2017
2.36
2.12 to 2.59
2
ppm
4
4
No
Erosion of natural
deposits; water
additive which
promotes strong
teeth; discharge
from fertilizer and
aluminum
factories
Nitrate
2019
1.4
1.2 to 1.6
2
ppm
10
10
No
Runoff from
fertilizer use;
leaching from
septic tanks,
sewage; erosion of
natural deposits
Selenium
2017
5
4 to 6
2
ppb
50
50
No
Discharge from
petroleum and
metal refineries;
erosion of natural
deposits; discharge
from mines
Fluoride: This
is an alert about your drinking water and a cosmetic dental problem that might affect children under nine years of
age. At low levels, fluoride can help prevent cavities, but children drinking water containing more than 2 parts per million (ppm)
of fluoride may develop cosmetic discoloration of their permanent teeth (dental fluorosis). The drinking
water provided by your
community water system has a fluoride concentration above 2 parts per million (ppm), but below
4 parts per million (ppm).
Dental fluorosis, in its moderate or severe forms, may result in a brown staining and/or pitting of the permanent teeth. This
problem occurs only in developing teeth, before they erupt from the gums. Children under nine years of age should be provided
with alternative sources of drinking water or water that has been treated to remove the fluoride to avoid the possibility of staining
and pitting of their permanent teeth. You may also want to contact your dentist about proper use by young children of fluoride -
containing products. Older children and adults may safely drink the water.
Drinking water containing more than 4 parts per million (ppm) of fluoride (the Colorado Department of Public Health and
Environment's drinking water standard) can increase your risk of developing bone disease. Your drinking water does not contain
more than 4 parts per million (ppm) of fluoride, but we're required to notify you when we discover that the fluoride levels in your
drinking water exceed 2 parts per million (ppm) because of this cosmetic dental problem.
For more information, please contact us. Some home water treatment units are also available to remove fluoride from drinking
water. To learn more about available home water treatment units, you may call NSF International at (1 -877 -8 -NSF -HELP).
KEENESBURG TOWN OF, PWS ID: CO0162438 2020 CCR Page 5 of 7
**Secondary standards are
discoloration)
Secondary Contaminants**
non -enforceable guidelines for contaminants
that may cause cosmetic effects (such as skin, or tooth
taste, odor, or color) in drinking water.
or aesthetic effects (such as
Contaminant
Name
Year
Average
Range
Low — High
Sample
Size
Unit of
Measure
Secondary Standard
Sodium
2017
219.35
209.8 to 228.9
2
ppm
N/A
Violations, Significant Deficiencies, and Formal Enforcement Actions
Health -Based Violations
Maximum contaminant level (MCL) violations: Test results for this contaminant show that the level was too high for the time
period shown. Please read the information shown below about potential health effects for vulnerable populations. This is likely
the same violation that we told you about in a past notice. We are evaluating, or we already completed an evaluation, to find the
best way to reduce or remove the contaminant. If the solution will take an extended period of time, we will keep you updated
with quarterly notices.
Treatment technique (TT) violations: We failed to complete an action that could affect water quality. Please read the
information shown below about potential health effects for vulnerable populations. This is likely the same violation that we told
you about in a past notice. We were required to meet a minimum operation/treatment standard, we were required to make
upgrades to our system, or we were required to evaluate our system for potential sanitary defects, and we failed to do so in the
time period shown below. If the solution will take an extended period of time, we will keep you updated with quarterly notices.
Name
Description
Time Period
Health Effects
Compliance
Value
TT Level or
MCL
TOTAL
TRIHALOME
THANES
(ITHM)
EXCEEDED THE
MAXIMUM
CONTAMINANT LEVEL
04/01/2019 - 06/30/2019
Some people who drink
water containing
trihalomethanes in
excess of the MCL over
many years may
experience problems
with their liver,
kidneys, or central
nervous systems, and
may have an increased
risk of getting cancer.
87 UG/L
80 UG/L
Additional Violation Information
Please share this information with all the other people who drink this water, especially those who may not have received this notice
directly (for example, people in apartments, nursing homes, schools, and businesses). You can do this by posting this notice in a public
place or distributing copies by hand or mail.
Flushing at the High School has been increased and the sampling site changed to sample prior to the Schools water system.
KEENESBURG TOWN OF, PWS ID: CO0162438
2020 CCR Page 6 of 7
Non -Health -Based Violations
These violations do not usually mean that there was a problem with the water quality. If there had been, we would have notified
you immediately. We missed collecting a sample (water quality is unknown), we reported the sample result after the due date, or
we did not complete a report/notice by the required date.
Name
Description
Time Period
PUBLIC NOTICE
FAILURE TO NOTIFY THE
PUBLIC/CONSUMERS
07/07/2019 - 08/23/2019
Additional Violation Information
Please share this information with all the other people who drink this water, especially those who may not have received this notice
directly (for example, people in apartments, nursing homes, schools, and businesses). You can do this by posting this notice in a public
place or distributing copies by hand or mail.
Consumers were notified on 8-23-2019. The Town has an in house ORC and polices are being put into place to ensure the Public is
notified in a timely manner.
KEENESBURG TOWN OF, PWS ID: CO0162438 2020 CCR Page 7 of 7
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