Source Water Information

Description of Water Source: Wells (2) 

Water Treatment:  After the water is drawn from the Tapley Well, we add disinfectant (chlorine) to eliminate disease carrying organisms.  The District uses Sodium Hypochlorite (chlorine) as its primary disinfectant.  Chlorine residuals with in the distribution system averaged 0.323 mg/L in 2017. Orthosphosphate (polyphosphate SK7860) is added to help eliminate scale formation.
Sodium Hydroxide (Caustic Soda 25%) is added to increase the pH level and help reduce the corrosion of household plumbing. 

 Source Water Assessment:   The sources of drinking water include rivers, lakes, ponds and wells.  As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and radioactive material and can pick up substances resulting from human or animal activity.  The Maine Drinking Water Program (DWP) has evaluated all public water supplies as part of the Source Water Assessment Program (SWAP).  The assessments include geology, hydrology, land uses, water testing information, and the extent of land ownership or protection by local ordinance to see how likely our drinking water source is to being contaminated by human activities  in the future.  Assessment results are available at town offices and public water systems.

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.  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 waste water discharges, oil and gas production, mining, or farming.  Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban storm water 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 runoff, and septic systems.  Radioactive contaminants, which can be naturally occurring or be the result of oil and gas production and mining activities.

     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 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 Safe Drinking Water Hotline (1-800-426-4791) or at: 

     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.  Clinton Water District 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:



There were no violations in 2017.


In 2017, our system was granted a “Synthetic Organics Waiver”.  This is a three year exemption from the monitoring/reporting requirements for the following industrial chemical(s) Toxaphene/chlordane/PCB, Carbamate Pesticides, semi volatile organics.  This waiver was granted due to the absence of these potential sources of contamination within a half mile radius of the water source.


ppm = parts per million or milligrams per liter (mg/L)
ppb =  parts per billion or micrograms per liter (ug/L)
pCi/L = picocuries per liter ( a measure of radioactivity)
pos = positive samples
MFL = million fibers per liter


Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in 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.

Running Annual Average (RAA): A 12 month rolling average of all monthly or quarterly samples at all locations. Calculation of the RAA may contain data from the previous year.

Locational Running Annual Average (LRAA): A 12 month rolling average of all monthly or quarterly samples at specific sampling locations.  Calculation of the LRAA may contain data from the previous year.

Action Level (AL):  The concentration of a contaminant that, if exceeded, triggers treatment or other requirements that a water system must follow.

Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant allowed in drinking water.  There is convincing evidence that addition of a disinfectant 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 to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

Contaminant                Date            Results                    MCL                 MCLG                        Source
Coliform (TCR) (1)        2017            0 pos                 1 pos/mo or 5%      0 pos       
Naturally present in the                                                                                                                                                       environment

Barium                       4/5/17        0.0048 ppm         2 ppm                     2 ppm      
Discharge of drilling wastes.                                                                                                                                               Discharge from metal                                                                                                                                                          refineries.  Erosion of natural                                                                                                                                              deposits.

Chromium                  4/5/17         1.5 ppb              100 ppb                100 ppb    
Discharge from steel and pulp                                                                                                                                            mills.  Erosion of natural                                                                                                                                                     deposits.

Nitrate (5)                  4/5/17         0.41 ppm              10 ppm                10 ppm     
Runoff from fertilizer use.                                                                                                                                                   Leaching from septic tanks,                                                                                                                                                 sewerage. Erosion of natural                                                                                                                                               deposits.


Combined Radium       4/7/15       0.451 pCi/l             5 pCi/l                  0 pCi/l     Erosion of natural deposits.

(-226 & -228)

Combined Uranium     4/5/17        0.61 ppb              30 ppb                  30 ppb     Erosion of natural deposits.

Radium -226              4/7/15        0.27 pCi/l              5 pCi/l                  0 pCi/l     Erosion of natural deposits.

Radium -228              4/7/15       0.181 pCi/l              5 pCi/l                  0 pCi/l     Erosion of natural deposits.

Uranium-238            3/10/14        0.65 ppb              30 ppm                  0 ppb       Erosion of natural deposits.

90th% Value (4) 1/1/14-12/31/16 0.74 ppm        AL= 1.3 ppm            1.3 ppm     Corrosion of household                                                                                                                                                        plumbing systems.

90th% Value (4)    1/1/14-12/31/16   1.4 ppm         AL = 15 ppb               0 ppb      Corrosion of household                                                                                                                                                        plumbing systems.

Disinfectants and Disinfection By Products
Total Haloacetic Acids LRAA(2017)     2 ppb              60 ppb                 0 ppb     By-product of drinking water                 (HAA5) (9)                              Range(1.5-1.5ppb)                                                    chlorination.

Total TriHalomethane LRAA(2017)      7 ppb              80 ppb                  0 ppb     By-product of drinking water                 (TTHM) (9)                                Range(7-7ppb)                                                       chlorination.

Chlorine Residual
Chlorine Residual       RAA 2017     0.323 ppm          4 ppm                    4 ppm    
By-product of drinking water                                                                                                                                              chlorination.

All other regulated drinking water contaminants were below detection limits.                    
Magnesium                     4/5/17    5.7 ppm
Sodium                           4/5/17    9.4 ppm
Zinc                                4/5/17   0.0011 ppm
Manganese                     4/5/17   0.036 ppm

Nickel                             4/5/17   0.00077 ppm
Sulfate                           4/5/17   9 ppm
Iron                                4/5/17   0.24 ppm
Chloride                          4/5/17   12 ppm       

1) Total Coliform Bacteria:  Reported as the highest monthly number of positive samples, for water systems that take <40 samples per month.

2) E. Coli: E. coli are bacteria whose presence indicates that the water may be contaminated with human or animal wastes. Human pathogens in these wastes can cause short-term effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They pose a greater health risk for infants, young children, the elderly, and people with severely-compromised immune systems.
3) Fluoride:  For those water systems that fluoridate, fluoride levels must be maintained between 0.5 to 1.2 ppm. The optimum level is 0.7 ppm.
4) Lead/Copper: Action Levels (AL) are measured at consumer’s tap. 90% of the tests must be equal to below the action level.
5) Nitrate: Nitrate in drinking water at levels above 10 ppm is a health risk for infants or less than six months of age.  High nitrate levels in drinking water can cause blue baby syndrome.  Nitrate levels may rise quickly for short periods of time because of rainfall or agricultural activity.  If you are caring for an infant you should ask advice from your health provider.

6) Arsenic: While your drinking water may meet EPA's standard for Arsenic, if it contains between 5 to 10 ppb you should know that the standard balances the current understanding of arsenic's possible health effects against the cost of removing it from drinking water. EPA continues to research the health effects of low levels of arsenic, 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. Quarterly compliance is based on running annual average.
7) Gross Alpha: Action level over 5 pCi/L requires testing for Radium 226 and 228. Action level over 15 pCi/L requires testing for Uranium. Compliance is based on Gross Alpha results minus Uranium results = Net Gross Alpha.
8) Radon:  The State of Maine adopted a Maximum Exposure Guideline (MEG) for Radon in drinking water at 4000 pCi/L effective 1/1/07. If Radon exceeds the MEG in water, treatment is recommended.  It is also advisable to test indoor air for Radon.

9) TTHM/HAA5:  Total Trihalomethanes and Haloacetic Acids (TTHM and HAA5) are formed as a by-product of drinking water chlorination.  This chemical reaction occurs when chlorine combines with naturally occurring organic matter in water.​ Compliance is based on running annual average.

111 Old Leanard Wood Road
PO Box 358
Clinton, ME 04927

Tel: 207-426-8039
Fax: 207-426-9455


Wesley Delile, Chair

Gary Colson, Clerk

Michael Schimpff, Treasurer

Andrew Fitzpatrick, Plant Manager

Joy Davis, Office Manager

Damon Bickford, Field Representative​

​PWSID  ME0090350

Clinton Water District

​2017 Consumer Confidence Report