Dover, MA Water Supply: The Hidden Contamination Risks Every Homebuyer Must Know

Dover's reliance on private wells and septic systems creates multiple water quality risks: (1) PFAS 'forever chemicals' detected at levels approaching the 20 ppt state limit in public systems and some private wells; (2) Nitrate contamination from septic systems affecting groundwater in developed areas, with Dover enforcing a strict 5 mg/L local standard (vs. 10 mg/L federal); (3) Naturally occurring minerals (iron, manganese) causing aesthetic issues. Dover's contamination profile is typical for well-reliant MetroWest towns—not uniquely severe, but requiring thorough testing and potential treatment systems.

Dover homebuyers, especially those considering private well properties, families with infants (nitrate risk), anyone evaluating Dover vs. sewered towns (Wellesley, Needham, Weston), and buyers comparing Dover to similar well-reliant communities (Sherborn, Carlisle).

• •PFAS detected in Dover's public water systems (17-20 ppt, approaching 20 ppt limit)
• •Dover enforces 5 mg/L nitrate standard for private wells (stricter than 10 mg/L federal limit)
• •All Dover homes use private septic systems—no public sewer available
• •MassDEP offers free PFAS testing for private well owners in Dover
• •Dover's contamination levels comparable to Sherborn, more moderate than Wellesley's 2021-2022 PFAS spike
• •Mandatory well testing required at property transfer with treatment installation if limits exceeded