"Interconnection ≠ Unlimited Tap." That is the title of one slide in the June 9, 2026 presentation Aquarion Water Company and its consultant gave the Dover Board of Selectmen. The slide explains that the recommended fix for Dover's town water would be capped from the day it opens. For anyone looking at a home near the town center, it is also the clearest account of what "public water" on a Dover listing means in the fall of 2026. The water source is under review, the cost is still being modeled, and the volume would be limited by contract.
On most listings, a public water connection reads as the simpler option and a settled feature of the house. In Dover, it is tied to a decision that has moved through two public information sessions. It still needs a Selectmen vote, a Town Meeting vote and action by the state Legislature before anything changes.
A Small System Carrying a Large Question
Most of Dover does not use Aquarion at all. The Board of Health's 2024 report says about two-thirds of households rely on private wells. About 35 percent are served by the town's six public water suppliers. Aquarion is the largest of those suppliers. It served 645 households plus commercial and public buildings, mostly in or next to the town center, through town-owned infrastructure.
Aquarion runs that service as three systems called Dover Main, Chickering and Springdale Farms. It draws from wellfields at Francis Street, Knollwood Drive, Draper Road and Chickering Drive. Those 645 households pay for the system. Board Chair David Doyle said at the June 9 meeting that Dover's Aquarion customers already pay the second-highest water rates in Massachusetts, at an average of $1,304 a year.
What the Water Tests Show Now
PFAS and discoloration are both real, but they show up differently, and a buyer should understand each one. Aquarion's PFAS FAQ says Massachusetts sets its PFAS6 limit at 20 parts per trillion. Aquarion's 2025 water quality report put every listed source below that line.
| Source, 2025 testing | Highest quarterly PFAS6 average | Range of results |
|---|---|---|
| Chickering | 17 ppt | 15 to 19 ppt |
| Francis Street | 9 ppt | below 2 to 10 ppt |
| Knollwood | 9 ppt | 7 to 9 ppt |
The Springdale Farms system did exceed the standard in 2022, with quarterly averages of 29 ppt and then 21 ppt. Aquarion says those levels fell below the limit in early 2023. That history matters because levels have come close to the limit and crossed it before. Chickering's 19 ppt high in 2025 is one part per trillion under it.
Discoloration is the problem people see at the tap. Aquarion attributes the brown water to naturally occurring iron and manganese in the Francis Street wells, and it says manganese rose in June 2023. In Aquarion's 2025 water quality report, iron averaged 84 parts per billion but reached as high as 2,520, against a secondary standard of 300. Manganese averaged 30 ppb with a high of 64, against a secondary standard of 50. The averages look modest, but the peaks explain why the town still listed discolored water and PFAS as issues for Aquarion customers in its September 2026 notice.
Why the Cheapest Option Leads
The presentation's most revealing line is about regulation, not chemistry. The Massachusetts Department of Public Utilities requires Aquarion to find the lowest-cost solution for customers that can actually be built. That rule shaped the comparison the consultant presented.
| Alternative | Capital cost | Year-one cost of service impact | 20-year cost of service impact |
|---|---|---|---|
| Interconnect with Dedham–Westwood Water District | $9.7M | $1.3M | $22.1M |
| Treat existing Francis Street wells | $12M | $1.8M | $30.1M |
| Build and treat a new source | $13M | $1.9M | $32.2M |
Aquarion estimates the interconnection would save customers about $8 million over its first 20 years. TownBrief reported that every figure includes PFAS filtration at the Knollwood Drive wellfield. It also reported that all Dover wellfields were confirmed to have PFAS contamination.
The consultant argued that the local alternatives are expensive for structural reasons. Testing at the Ponzi conservation site in October 2025 found PFAS at 1.6 times the state limit and more than four times the new federal limit. Permitting and building a well there would likely take more than five years. The deck explains why it does not recommend searching for more sources. Groundwater surrounded by unsewered customers will likely contain PFAS and need treatment. New sources sit away from existing pipes, and connecting pipe costs $1 million to $1.5 million per mile. Every home in Dover relies on septic. That is the same reason a town of large lots and private systems finds clean new groundwater hard to secure.
At the September 26 session, Aquarion said it would pay for the interconnection pipe and part of a pump station that the Dedham–Westwood district is building. MassDEP had already awarded Aquarion's Dover system $850,000 in July 2025 for PFAS treatment at an existing well and for the design and construction of the interconnection. No published material yet shows what any option would add to a household's bill, and Doyle asked for cost breakdowns per hundred gallons before any Town Meeting vote.
The Cap Built Into the Recommended Fix
The interconnection would be a secondary source by design. The required approvals allow it only on that basis, and Knollwood would have to stay the primary supply. Three limits would control how much water could flow through the connection: the Interbasin Transfer Act, the size of the infrastructure built for it, and an annual volume limit written into the contracts.
The capacity figures make the tradeoff concrete. The interconnection would supply 0.23 million gallons per day. Treating Francis Street would supply 0.47 MGD, and a new Ponzi source would supply 0.50 MGD. The cheapest option delivers the least added water. That is the sense of the slide's title: Dover would get higher-quality water in a limited amount, under contracts the town itself would sign. Under the process outlined, both the MWRA contract and the Aquarion contract would be with the Town of Dover.
Every Step Still Ahead
The town's October newsletter describes Dover as considering two options and says about 40 residents attended the September 26 session at the Caryl Community Center. In the session recording, the presenters still walked through three alternatives, with the interconnection as the consultant's recommendation. The steps Aquarion's deck lists before the interconnection could operate include:
- A Board of Selectmen vote after community information sessions
- A Town Meeting vote
- Showing community acceptance for admission to the MWRA
- Required environmental reviews
- An amendment to the MWRA Enabling Act by the Legislature and Governor
- An application to the MWRA, followed by about two years to prove water need and show how impacts will be mitigated
- Signed water supply contracts
None of these steps has a public date yet. The Selectmen's next scheduled meeting is October 8, 2026. In August, the Town Meeting Review Committee reached a general consensus to use a fall Special Town Meeting when articles need more time for deliberation. It set no date and did not tie that decision to the water question.
The Concern That Reaches Beyond the Pipe
At the June meeting, Doyle and board member Robin Rankin both said that a reliable MWRA supply could expose Dover to greater state pressure to allow high-density housing. Rankin also said the board intends to hire its own independent water consultant. Aquarion's deck adds one relevant point. A public water supplier is obligated to serve existing and new customers "consistent with the Town's plan of development."
Water capacity has long been one of the practical limits on how much Dover can build. The contractual volume cap would keep that limit in place in one form. The board's stated concern is that a dependable outside supply could weaken it in another. The town has not resolved either question. Whatever Dover decides on water will affect its zoning debates too.
Questions to Raise Before an Offer
None of this calls for a single answer, but it does give a buyer specific questions for a house near the town center:
- Which supplier serves the property: Aquarion, one of the town's other public suppliers or a private well?
- Which Aquarion system serves it: Dover Main, Chickering or Springdale Farms?
- Have the sellers seen discolored water, and is any point-of-use or whole-house filtration installed?
- What did the household's water bills total over the past year?
- Has the town scheduled a Town Meeting vote on the water plan before the expected closing date?
The answers will not predict how the town votes, but they show what the property depends on today. Aquarion's 2025 water quality report and the town's Aquarion Water Quality Solutions page are the sources to check as the decision moves forward.
A Few Questions Buyers Ask
Does this affect homes on private wells? The Aquarion decision applies to Aquarion's systems. Private wells in Dover are under the town's drought restrictions, though, which treat wells and municipal water as one shared resource. The Town of Dover's September 17 drought notice says a Level 1 drought limits nonessential outdoor watering to once a week.
When would anything change at the tap? No published date exists. A December 2024 Aquarion letter estimated completion by the end of 2027, depending on approvals. The June 2026 deck gives no updated target, so treat that estimate as out of date.
Is current Aquarion water over the PFAS limit? Aquarion's 2025 results for Chickering, Francis Street and Knollwood were all below the 20 ppt state limit. Chickering came closest, with a highest quarterly average of 17 ppt.
If you are weighing a Dover property on Aquarion water, or preparing to sell one while this decision is pending, Mary Crane Properties can help you work through the water questions before they come up in negotiation. Schedule a confidential consultation with Mary.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.