Annual Drinking Water Quality Report for 2017


Annual Drinking Water Quality Report for 2017

Village of Mexico/Town of Mexico PWS
3236 Main Street, Mexico, NY 13114 (Village)
P.O. Box 98, Mexico NY 13114 (Town)
(Public Water Supply ID#s 3704359& 3730182)


To comply with State regulations, the Village and Town of Mexico, will be annually issuing a report describing the quality of your drinking water.  The purpose of this report is to raise your understanding of drinking water and awareness of the need to protect our drinking water sources.  This report provides an overview of last year’s water quality.  Included are details about where your water comes from, what it contains, and how it compares to State standards.

If you have any questions about this report or concerning your drinking water, please contact Village Mayor Terry Grimshaw at (315) 963-7564 or Town Supervisor Dave Anderson at (315) 963-7633. We want you to be informed about your drinking water.  If you want to learn more, please attend any of our regularly scheduled monthly meetings. They are generally held on the first Wednesday of each month at the Village Hall located on Main Street.

Where does our water come from?

 In general, 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 activities.  Contaminants that may be present in source water include: microbial contaminants; inorganic contaminants; pesticides and herbicides; organic chemical contaminants; and radioactive contaminants.  In order to ensure that tap water is safe to drink, the State and the EPA prescribe regulations which limit the amount of certain contaminants in water provided by public water systems.  The State Health Department’s and the FDA’s regulations establish limits for contaminants in bottled water which must provide the same protection for public health.

Our water system serves approximately 2,100 people through 1,158 service connections.  The system’s water source consists of three (3) drilled wells with depths ranging from approximately 30 to 65 feet.  The wells are screened and draw water from the Mexico-Hastings aquifer.  The well field is located approximately two miles to the south of the Village’s incorporated limits.  Three wells are used as the primary water source and the water systems have an adequate supply of water to meet current demand.  Well water is pumped into two 300,000-gallon water tower storage tanks.   The Village and Town systems are disinfected with sodium hypochlorite.


 A source water assessment has been completed for our system.  The Mexico wells withdraw water from a confined aquifer with a rated sensitivity of medium to synthetic organic compounds, petroleum products, metals and biological contaminants.  However, sampling conducted since the last source water assessment has indicated that the finished from the wells water meets all state drinking water requirements.

Are there contaminants in our drinking water?

 As the State regulations require, we routinely test your drinking water for numerous contaminants. These contaminants include: total coliform, inorganic compounds, nitrate, nitrite, lead and copper, radioactive contaminants, volatile organic compounds, disinfection byproducts, and synthetic organic compounds.  Our system sampled for total coliform, lead and copper, disinfection byproducts and nitrate in 2015.The table presented below depicts which compounds were detected in your drinking water.  The State allows us to test for some contaminants less than once per year because the concentrations of these contaminants do not change frequently.  Some of our data, though representative, are more than one year old.

It should be noted that all drinking water, including bottled drinking water, may be reasonably 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 EPA’s Safe Drinking Water Hotline (800-426-4791) or the Oswego County Health Department at (315) 349-3557.




* The levels presented for copper and lead represent the 90th percentile of the 10 sites tested.  A percentile is a value on a scale of 100 that indicates the percent of a distribution that is equal to or below it.  The 90th percentile value is equal to or greater than 90% of the values detected in your water system.  In this case 10 samples were collected and the 90th percentile value was the second highest value.  The action level for copper and lead were not exceeded at any of the 10 sites tested.

** The State considers 50 pCi/l to be the level of concern for beta particles.




Maximum Contaminant Level(MCL): The highest level of a contaminant that is allowed in drinking water.  MCLs are set as close to the MCLGs as feasible.

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 (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 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 contamination.

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

Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water.

Non-Detects (ND): Laboratory analysis indicates that the constituent is not present.

Milligrams per liter (mg/l): Corresponds to one part of liquid in one million parts of liquid (parts per million – ppm).

Micrograms per liter (ug/l):Corresponds to one part of liquid in one billion parts of liquid (parts per billion – ppb).

Picocuries per liter (pCi/L):A measure of the radioactivity in water.