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2016 Annual Water Quality Report
Monday, March 20, 2017

2016 Annual Water Quality Report 2016 Annual Water Quality Report 2016 Annual Water Quality Report 2016 Annual Water Quality Report2016 Annual Water Quality Report 2016 Annual Water Quality Report2016 Annual Water Quality Report 2016 Annual Water Quality Report 2016 Annual Water Quality Report 2016 Annual Water Quality Report 2016 Annual Water Quality Report 2016 Annual Water Quality Report 2016 Annual Water Quality Report
Town of ThermopolisTown of ThermopolisTown of ThermopolisTown of ThermopolisTown of Thermopolis Town of ThermopolisTown of Thermopolis Town of Thermopolis Town of Thermopolis Town of Thermopolis Town of Thermopolis
PWS#WY5600056 PWS#WY5600056 PWS#WY5600056
Is my water safe?

We are pleased to present this year`s Annual Water Quality Report (Consumer Confidence Report) as required by the Safe Drinking Water Act (SDWA). This report is designed to provide details about where your water comes from, what it contains, and how it compares to standards set by regulatory agencies. This report is a snapshot of last year`s water quality. We are committed to providing you with information because informed customers are our best allies.
Do I need to take special precautions?

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. EPA/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 Water Drinking Hotline (800-426-4791).
Where does my water come from?

Our water source is three wells and one source from the Big Horn River. Our wells draw water from the Alluvial formation.
Source water assessment and its availability
Our source water assessment is available at the Town Hall.
Why are there contaminants in my 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 water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency`s (EPA) Safe Drinking Water Hotline (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: 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, which 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, 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; and 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. Food and Drug Administration (FDA) regulations establish limits for contaminants in bottled water which must provide the same protection for public health.
How can I get involved?

If you have any questions or concerns about your water, please attend any of our regularly scheduled City Council meetings. The meetings are held on the first and third Tuesday of every month at 7:00 PM located at the Town Hall.
Description of Water Treatment Process
Your water is treated in a "treatment train" (a series of processes applied in a sequence) that includes coagulation, flocculation, sedimentation, filtration, and disinfection. Coagulation removes dirt and other particles suspended in the source water by adding chemicals (coagulants) to form tiny sticky particles called "floc," which attract the dirt particles. Flocculation (the formation of larger flocs from smaller flocs) is achieved using gentle, constant mixing. The heavy particles settle naturally out of the water in a sedimentation basin. The clear water then moves to the filtration process where the water passes through sand, gravel, charcoal or other filters that remove even smaller particles. A small amount of chlorine or other disinfection method is used to kill bacteria and other microorganisms (viruses, cysts, etc.) that may be in the water before water is stored and distributed to homes and businesses in the community.
Water Conservation Tips

Did you know that the average U.S. household uses approximately 400 gallons of water per day or 100 gallons per person per day? Luckily, there are many low-cost and no-cost ways to conserve water. Small changes can make a big difference - try one today and soon it will become second nature.
? Take short showers - a 5 minute shower uses 4 to 5 gallons of water compared to up to 50 gallons for a bath.
? Shut off water while brushing your teeth, washing your hair and shaving and save up to 500 gallons a month.
? Use a water-efficient showerhead. They`re inexpensive, easy to install, and can save you up to 750 gallons a month.
? Run your clothes washer and dishwasher only when they are full. You can save up to 1,000 gallons a month.
? Water plants only when necessary.
? Fix leaky toilets and faucets. Faucet washers are inexpensive and take only a few minutes to replace. To check your toilet for a leak, place a few drops of food coloring in the tank and wait. If it seeps into the toilet bowl without flushing, you have a leak. Fixing it or replacing it with a new, more efficient model can save up to 1,000 gallons a month.
? Adjust sprinklers so only your lawn is watered. Apply water only as fast as the soil can absorb it and during the cooler parts of the day to reduce evaporation.
? Teach your kids about water conservation to ensure a future generation that uses water wisely. Make it a family effort to reduce next month`s water bill!
? Visit www.epa.gov/watersense for more information.
Cross Connection Control Survey

The purpose of this survey is to determine whether a cross-connection may exist at your home or business. A cross connection is an unprotected or improper connection to a public water distribution system that may cause contamination or pollution to enter the system. We are responsible for enforcing cross-connection control regulations and insuring that no contaminants can, under any flow conditions, enter the distribution system. If you have any of the devices listed below please contact us so that we can discuss the issue, and if needed, survey your connection and assist you in isolating it if that is necessary.
? Boiler/ Radiant heater (water heaters not included)
? Underground lawn sprinkler system
? Pool or hot tub (whirlpool tubs not included)
? Additional source(s) of water on the property
? Decorative pond
? Watering trough
Source Water Protection Tips

Protection of drinking water is everyone`s responsibility. You can help protect your community`s drinking water source in several ways:
? Eliminate excess use of lawn and garden fertilizers and pesticides - they contain hazardous chemicals that can reach your drinking water source.
? Pick up after your pets.
? If you have your own septic system, properly maintain your system to reduce leaching to water sources or consider connecting to a public water system.
? Dispose of chemicals properly; take used motor oil to a recycling center.
? Volunteer in your community. Find a watershed or wellhead protection organization in your community and volunteer to help. If there are no active groups, consider starting one. Use EPA`s Adopt Your Watershed to locate groups in your community, or visit the Watershed Information Network`s How to Start a Watershed Team.
? Organize a storm drain stenciling project with your local government or water supplier. Stencil a message next to the street drain reminding people "Dump No Waste - Drains to River" or "Protect Your Water." Produce and distribute a flyer for households to remind residents that storm drains dump directly into your local water body.
Additional Information for 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 materials and components associated with service lines and home plumbing. Town of Thermopolis 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 http://www.epa.gov/safewater/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 materials and components associated with service lines and home plumbing. Town of Thermopolis 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 http://www.epa.gov/safewater/lead.
Water Quality Data Table

In order to ensure that tap water is safe to drink, EPA prescribes regulations which limit the amount of contaminants in water provided by public water systems. The table below lists all of the drinking water contaminants that we detected during the calendar year of this report. Although many more contaminants were tested, only those substances listed below were found in your water. All sources of drinking water contain some naturally occurring contaminants. At low levels, these substances are generally not harmful in our drinking water. Removing all contaminants would be extremely expensive, and in most cases, would not provide increased protection of public health. A few naturally occurring minerals may actually improve the taste of drinking water and have nutritional value at low levels. Unless otherwise noted, the data presented in this table is from testing done in the calendar year of the report. The EPA or the State requires us to monitor for certain contaminants less than once per year because the concentrations of these contaminants do not vary significantly from year to year, or the system is not considered vulnerable to this type of contamination. As such, some of our data, though representative, may be more than one year old. In this table you will find terms and abbreviations that might not be familiar to you. To help you better understand these terms, we have provided the definitions below the table.
Contaminants MCLG or MRDLG MCL, TT, or MRDL Your Water Range Sample Date Violation Typical Source Low High Disinfectants & Disinfection By-Products (There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants)
Haloacetic Acids (HAA5) (ppb)
NA
60
18
.33
18
2016
No
By-product of drinking water chlorination
TTHMs [Total Trihalomethanes] (ppb)
NA
80
60.25
16
60.25
2016
No
By-product of drinking water disinfection
Total Organic Carbon (% Removal)
NA
TT
39
NA
2016
No
Naturally present in the environment Inorganic Contaminants
Fluoride (ppm)
4
4
.2
NA
2016
No
Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer and aluminum factories
Nitrate [measured as Nitrogen] (ppm)
10
10
.3
NA
2016
No
Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits
Sodium (optional) (ppm)
NA
58
NA
2016
No
Erosion of natural deposits; Leaching
Contaminants MCLG or MRDLG MCL, TT, or MRDL Your Water Range Sample Date Violation Typical Source Low High Microbiological Contaminants
Total Coliform (positive samples/month)
0
1
0
NA
2016
No
Naturally present in the environment
Turbidity (NTU)
NA
0.3
100
NA
2016
No
Soil runoff
100% of the samples were below the TT value of .3. A value less than 95% constitutes a TT violation. The highest single measurement was .263. Any measurement in excess of 1 is a violation unless otherwise approved by the state. Radioactive Contaminants
Alpha emitters (pCi/L)
0
15
1.5
NA
2013
No
Erosion of natural deposits Contaminants MCLG AL Your Water Sample Date # Samples Exceeding AL Exceeds AL Typical Source Inorganic Contaminants
Copper - action level at consumer taps (ppm)
1.3
1.3
.25
2016
0
No
Corrosion of household plumbing systems; Erosion of natural deposits Inorganic Contaminants
Lead - action level at consumer taps (ppb)
0
15
2
2016
0
No
Corrosion of household plumbing systems; Erosion of natural deposits
Undetected Contaminants
The following contaminants were monitored for, but not detected, in your water.
Contaminants MCLG or MRDLG MCL, TT, or MRDL Your Water Violation Typical Source
1,1,1-Trichloroethane (ppb)
200
200
ND
No
Discharge from metal degreasing sites and other factories
1,1,2-Trichloroethane (ppb)
3
5
ND
No
Discharge from industrial chemical factories
1,1-Dichloroethylene (ppb)
7
7
ND
No
Discharge from industrial chemical factories
1,2,4-Trichlorobenzene (ppb)
70
70
ND
No
Discharge from textile-finishing factories
1,2-Dichloroethane (ppb)
0
5
ND
No
Discharge from industrial chemical factories
1,2-Dichloropropane (ppb)
0
5
ND
No
Discharge from industrial chemical factories
2,4,5-TP (Silvex) (ppb)
50
50
ND
No
Residue of banned herbicide
2,4-D (ppb)
70
70
ND
No
Runoff from herbicide used on row crops
Contaminants MCLG or MRDLG MCL, TT, or MRDL Your Water Violation Typical Source
Alachlor (ppb)
0
2
ND
No
Runoff from herbicide used on row crops
Antimony (ppb)
6
6
ND
No
Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder; test addition.
Arsenic (ppb)
0
10
ND
No
Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes
Asbestos (MFL)
7
7
ND
No
Decay of asbestos cement water mains; Erosion of natural deposits
Atrazine (ppb)
3
3
ND
No
Runoff from herbicide used on row crops
Barium (ppm)
2
2
ND
No
Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits
Benzene (ppb)
0
5
ND
No
Discharge from factories; Leaching from gas storage tanks and landfills
Benzo(a)pyrene (ppt)
0
200
ND
No
Leaching from linings of water storage tanks and distribution lines
Beryllium (ppb)
4
4
ND
No
Discharge from metal refineries and coal-burning factories; Discharge from electrical, aerospace, and defense industries
Cadmium (ppb)
5
5
ND
No
Corrosion of galvanized pipes; Erosion of natural deposits; Discharge from metal refineries; runoff from waste batteries and paints
Carbofuran (ppb)
40
40
ND
No
Leaching of soil fumigant used on rice and alfalfa
Carbon Tetrachloride (ppb)
0
5
ND
No
Discharge from chemical plants and other industrial activities
Chlordane (ppb)
0
2
ND
No
Residue of banned termiticide
Chlorobenzene (monochlorobenzene) (ppb)
100
100
ND
No
Discharge from chemical and agricultural chemical factories
Chromium (ppb)
100
100
ND
No
Discharge from steel and pulp mills; Erosion of natural deposits
Cyanide (ppb)
200
200
ND
No
Discharge from plastic and fertilizer factories; Discharge from steel/metal factories
Dalapon (ppb)
200
200
ND
No
Runoff from herbicide used on rights of way
Di (2-ethylhexyl) adipate (ppb)
400
400
ND
No
Discharge from chemical factories
Di (2-ethylhexyl) phthalate (ppb)
0
6
ND
No
Discharge from rubber and chemical factories
Dibromochloropropane (DBCP) (ppt)
0
200
ND
No
Runoff/leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards
Dichloromethane (ppb)
0
5
ND
No
Discharge from pharmaceutical and chemical factories
Contaminants MCLG or MRDLG MCL, TT, or MRDL Your Water Violation Typical Source
Dinoseb (ppb)
7
7
ND
No
Runoff from herbicide used on soybeans and vegetables
Endrin (ppb)
2
2
ND
No
Residue of banned insecticide
Ethylbenzene (ppb)
700
700
ND
No
Discharge from petroleum refineries
Ethylene dibromide (ppt)
0
50
ND
No
Discharge from petroleum refineries
Heptachlor (ppt)
0
400
ND
No
Residue of banned pesticide
Heptachlor epoxide (ppt)
0
200
ND
No
Breakdown of heptachlor
Hexachlorobenzene (ppb)
0
1
ND
No
Discharge from metal refineries and agricultural chemical factories
Hexachlorocyclopentadiene (ppb)
50
50
ND
No
Discharge from chemical factories
Lindane (ppt)
200
200
ND
No
Runoff/leaching from insecticide used on cattle, lumber, gardens
Mercury [Inorganic] (ppb)
2
2
ND
No
Erosion of natural deposits; Discharge from refineries and factories; Runoff from landfills; Runoff from cropland
Methoxychlor (ppb)
40
40
ND
No
Runoff/leaching from insecticide used on fruits, vegetables, alfalfa, livestock
Nitrite [measured as Nitrogen] (ppm)
1
1
ND
No
Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits
Oxamyl [Vydate] (ppb)
200
200
ND
No
Runoff/leaching from insecticide used on apples, potatoes and tomatoes
PCBs [Polychlorinated biphenyls] (ppt)
0
500
ND
No
Runoff from landfills; Discharge of waste chemicals
Pentachlorophenol (ppb)
0
1
ND
No
Discharge from wood preserving factories
Picloram (ppb)
500
500
ND
No
Herbicide runoff
Selenium (ppb)
50
50
ND
No
Discharge from petroleum and metal refineries; Erosion of natural deposits; Discharge from mines
Simazine (ppb)
4
4
ND
No
Herbicide runoff
Styrene (ppb)
100
100
ND
No
Discharge from rubber and plastic factories; Leaching from landfills
Tetrachloroethylene (ppb)
0
5
ND
No
Discharge from factories and dry cleaners
Thallium (ppb)
.5
2
ND
No
Discharge from electronics, glass, and Leaching from ore-processing sites; drug factories
Toluene (ppm)
1
1
ND
No
Discharge from petroleum factories
Toxaphene (ppb)
0
3
ND
No
Runoff/leaching from insecticide used on cotton and cattle
Trichloroethylene (ppb)
0
5
ND
No
Discharge from metal degreasing sites and
Contaminants MCLG or MRDLG MCL, TT, or MRDL Your Water Violation Typical Source
other factories
Vinyl Chloride (ppb)
0
2
ND
No
Leaching from PVC piping; Discharge from plastics factories
Xylenes (ppm)
10
10
ND
No
Discharge from petroleum factories; Discharge from chemical factories
cis-1,2-Dichloroethylene (ppb)
70
70
ND
No
Discharge from industrial chemical factories
o-Dichlorobenzene (ppb)
600
600
ND
No
Discharge from industrial chemical factories
p-Dichlorobenzene (ppb)
75
75
ND
No
Discharge from industrial chemical factories
trans-1,2-Dichloroethylene (ppb)
100
100
ND
No
Discharge from industrial chemical factories
Unit Descriptions
Term
Definition
ppm
ppm: parts per million, or milligrams per liter (mg/L)
ppb
ppb: parts per billion, or micrograms per liter (µg/L)
ppt
ppt: parts per trillion, or nanograms per liter
pCi/L
pCi/L: picocuries per liter (a measure of radioactivity)
MFL
MFL: million fibers per liter, used to measure asbestos concentration
NTU
NTU: Nephelometric Turbidity Units. Turbidity is a measure of the cloudiness of the water. We monitor it because it is a good indicator of the effectiveness of our filtration system.
positive samples/month
positive samples/month: Number of samples taken monthly that were found to be positive
NA
NA: not applicable
ND
ND: Not detected
NR
NR: Monitoring not required, but recommended.
Important Drinking Water Definitions
Term
Definition
MCLG
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.
MCL
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.
TT
TT: Treatment Technique: A required process intended to reduce the level of a contaminant in drinking water.
AL
AL: Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
Variances and Exemptions
Variances and Exemptions: State or EPA permission not to meet an MCL or a treatment technique under certain conditions.
Important Drinking Water Definitions
MRDLG
MRDLG: Maximum residual disinfection 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.
MRDL
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.
MNR
MNR: Monitored Not Regulated
MPL
MPL: State Assigned Maximum Permissible Level
For more information please contact:
Contact Name: Chris Seilaff or Ernie Slagle Address: P.O. Box 603 Thermopolis, WY 82443 Phone: (307) 864-2658


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Thermopolis, WY 82443

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