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The original item was published from 10/14/2022 3:43:47 PM to 10/22/2022 12:00:02 AM.

News Flash

Board of Selectmen

Posted on: October 14, 2022

[ARCHIVED] Drinking Water Tier 1 Notice (Non Emergency)



To all users of the Medfield Water Department

located in Medfield, Massachusetts



We routinely monitor for the presence of drinking water contaminants to ensure the safety of the water supply.  

On October 13, 2022, our water system was notified that a water sample collected on October 12, 2022 from Well #4 tested positive for E.coli, which is a fecal indicator.  Fecal indicators are used to detect groundwater sources that may be susceptible to fecal contamination which may contain harmful viruses or bacteria.  When we learned of the fecal positive sample, THE WELL WAS IMMEDIATELY TAKEN OFFLINE.


The water delivered to your taps through the distribution system is disinfected with chlorine to kill viruses and bacteria, including E.coli.  It is important to note that samples collected on October 12, 2022 in the distribution system did NOT detect any fecal contaminants. 


This source is one of four active wells that supplies drinking water to our system.  In accordance with the federal Ground Water Rule (GWR) requirements, we are notifying you of the situation and conducting additional sampling to evaluate the extent of potential fecal contamination and will take further actions as necessary.  




This is not an emergency, you do NOT need to boil your water or take other corrective actions at this time.


  • The USEPA requires us to provide you with this notice and the following information on fecal indicators: “Fecal indicators are microbes whose presence indicates that the water may be contaminated with human or animal wastes.  Microbes in these wastes can cause diarrhea, cramps, nausea, headaches, or other symptoms.  They may pose a special health risk for infants, young children, some of the elderly, and people with severely compromised immune systems.”  These symptoms can also be caused by issues unrelated to drinking water.  If you experience any of these symptoms and they persist, or, if you have specific health concerns, you may want to discuss such concerns with your doctor.  General guidelines on ways to lessen the risk of infection by microbes are available from the EPA Safe Drinking Water Hotline at 1-800-426-4791 or


  • 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.




The well will remain offline for further evaluation. Our system is undergoing repeat testing and evaluation to determine if the current level of treatment is adequate or if additional corrective actions are necessary to reduce the risk of potential fecal contamination in our drinking water supply.  


We are in contact with MassDEP during this process who will evaluate the effectiveness of the steps taken and determine if any further action is required.  If necessary, you will be notified again if you need to take any corrective actions.  This notice does not affect persons using private drinking water wells.



For more information and further updates, please contact Moe Goulet, DPW Director at 508 906 3311 or visit our website at

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