The state tells Medfield when it has to employ watering bans, and the state uses the water level in the Charles River as one measure of when such water bans are required. This graph shows the water level in the Charles River over the past year. I do see that the data is from the federal government, so it is possible that data may not be available in the future.
Medfield needs to regulate the water usage of private wells in town, as low water levels are a shared issue. I hope the private wells annual town meeting (ATM) warrant article that subjected the 87 private wells in town to bans which was recently withdrawn can get enacted next year.
Medfield02052's Blog 
I wonder if removing the Dam in South Natick will affect the water level in Medfield…
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