Details for CCR 2019

2018 Consumer Confidence Report Data
LAKE COMO SANITARY DIST 1, PWS ID: 26515368

Water System Information
If you would like to know more about the information contained in this report, please contact Edward Mclemon at (262) 248-2077.
A copy of this report is available at; Lake Como Sanitary District # 1 N3420 Dell Place, Lake Geneva WI
Opportunity for input on decisions affecting your water quality
THIRD WEDNESDAY OF EACH MONTH AT 5:30P.M.
Health Information
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 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 (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 systems 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. EPA/CDC
guidelines on appropriate means to lessen the risk of infection by cryptosporidium and other microbial contaminants are available from the Environmental
Protection Agency’s safe drinking water hotline (800-426-4791).
Source(s) of Water
Source ID
Source
Depth (in feet)
Status
1
Groundwater
1500
Active
2
Groundwater
1500
Active
To obtain a summary ofthe source water assessment please contact, Edward Mclemon at (262) 248-2077.
Educational 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 include:
• Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations
and wildlife.
• Inorganic contaminants, such as 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, which 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, which are by-products of industrial processes and petroleum
production, and can also come from gas stations, urban stormwater 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, EPA prescribes regulations that limit the amount of certain contaminants in water provided by public water
systems. FDA regulations establish limits for contaminants in bottled water, which shall provide the same protection for public health.
Definitions
Term
Definition
AL
Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system
must follow.
Level 1
A Level 1 assessment is a study of the water system to identify potential problems and determine, if possible, why total coliform bacteria have
Assessment been found in our water system.
Level 2
A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine, if possible, why an E. coli
Assessment MCL violation has occurred or why total coliform bacteria have been found in our water system, or both, on multiple occasions.
MCL
Maximum Contaminant Level: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as
feasible using the best available treatment technology.
MCLG
Maximum Contaminant Level Goal: 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.
MFL
million fibers per liter
MRDL
Maximum residual disinfectant level: 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.
MRDLG
Maximum residual disinfectant level goal: 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.
mrem/year
millirems per year (a measure of radiation absorbed by the body)
NTU
Nephelometric Turbidity Units
pCi/l
picocuries per liter (a measure of radioactivity)
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
ppq
parts per quadrillion, or picograms per liter
TCR
Total Coliform Rule
TT
Treatment Technique: A required process intended to reduce the level of a contaminant in drinking water.
Detected Contaminants
Your water was tested for many contaminants last year. We are allowed to monitor for some contaminants less frequently than once a year. The following
tables list only those contaminants which were detected in your water. If a contaminant was detected last year, it will appear in the following tables without a
sample date. If the contaminant was not monitored last year, but was detected within the last 5 years, it will appear in the tables below along with the
sample date.
Disinfection Byproducts
Contaminant Site MCL MCLG
Level
Range
Sample Date
Violation
Typical Source of Contaminant
(units)
Found
(if prior to 2018)
HAA5 (ppb)
DB1
60
60
13
13
No
By-product of drinking water chlorination
TTHM (ppb)
DB1
80
0
21.6
21.6
No
By-product of drinking water chlorination
Inorganic Contaminants
Contaminant Site MCL MCLG
Level
Range
Sample
Violation
Typical
(units)
Found
Date
Source of Contaminant
(if prior to
2018)
BARIUM (ppm)
2
2
0.700
0.700
9/19/2017
No
Discharge of drilling wastes; Discharge from metal refineries;
Erosion of natural deposits
FLUORIDE (ppm)
4
4
0.3
0.3
9/19/2017
No
Erosion of natural deposits; Water additive which promotes strong
teeth; Discharge from fertilizer and aluminum factories
NICKEL (ppb)
100
0.5400
0.5400
9/19/2017
No
Nickel occurs naturally in soils, ground water and surface waters
and is often used in electroplating, stainless steel and alloy
products
NITRATE (N03-N)
10
10
0.03
0.03
No
Runoff from fertilizer use; Leaching from septic tanks, sewage;
(ppm)
Erosion of natural deposits
SODIUM (ppm)
n/a
n/a
20.00
20.00
9/19/2017
No
n/a
Contaminant
Action
MCLG
90th Percentile
# of Results
Sample Date
Violation
Typical Source of Contaminant
(units)
Level
Level Found
(if prior to 2018)
COPPER (ppm)
AL=1.3
1.3
0.5300
0 of 10 results
9/13/2017
No
Corrosion of household plumbing systems;
were above
Erosion of natural deposits; Leaching from wood
the action
preservatives
level.
LEAD (ppb)
AL=15
0
3.80
0 of 10 results
9/13/2017
No
Corrosion of household plumbing systems;
were above
Erosion of natural deposits
the action
level.
Radioactive Contaminants
Contaminant (units)
Site
MCL
MCLG
Level Found Range Sample Date
Violation
Typical
(if prior to 2018)
Source of Contaminant
GROSS ALPHA, EXCL. R & U (pCi/l)
15
0
4.0
4.0
9/19/2017
No
Erosion of natural deposits
RADIUM, (226 + 228) (pCi/l)
5
0
4.7
4.7
9/19/2017
No
Erosion of natural deposits
GROSS ALPHA, INCL. R & U (n/a)
n/a
n/a
4.0
4.0
9/19/2017
No
Erosion of natural deposits
Unregulated Contaminants
Unregulated contaminants are those for which EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is
to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulation is warranted. EPA required us to
participate in this monitoring.
Contaminant (units)
Level Found
Range
Sample Date (if prior to 2018)
CHLOROMETHANE (METHYLCHLORIDE) (ppb)
1.40
0.81-1.40
9/18/2017
Additional Health Information
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 materials and components associated with service lines and home plumbing. Lake Como Sanitary Dist 1 is responsible for providing high quality
drinking 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. 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 www.epa.gov/safewater/lead.

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