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Water filter service in Connecticut

What the state requires, how the water differs by region, and every area we cover in Connecticut.

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Connecticut is a town state, and water follows the towns

Connecticut has no county government in the way its neighbours do. The town is the unit that matters, and that shows up in water supply as much as in anything else.

Public water here is supplied by a mix of large regional utilities and small town-level systems. Aquarion Water Company of Connecticut, a subsidiary of Eversource, alone serves roughly 198,000 customer accounts representing more than 625,000 residents across 51 Connecticut cities and towns.

The consequence for a homeowner is that the water in two adjacent towns can come from entirely different sources under entirely different treatment, even where the same company runs both. Identify the system that serves your address rather than reasoning about the region.

Surface water, and what that means for treatment

Much of populated Connecticut is supplied from surface water reservoirs rather than groundwater. Surface supplies behave differently from wells in ways that affect what a filter needs to do.

They vary seasonally. Water temperature, organic content, and taste change through the year, and disinfection by-product levels tend to peak in warm, wet months because there is more organic matter for the disinfectant to react with.

They are also treated more intensively, which is why taste and odour complaints on a Connecticut public supply are usually about the disinfectant rather than about anything that got past it. That is a carbon filter problem, and frequently a one-tap problem rather than a whole-building one.

Private wells in the rural towns

Away from the shoreline and the larger towns, a substantial share of Connecticut households are on private wells drawing from fractured bedrock.

That geology brings arsenic and radon into the conversation in a way it does not in much of New Jersey. Both occur naturally in bedrock, both are invisible and tasteless, and neither is detected by any test you can carry out at your own sink.

Arsenic needs a speciated laboratory test, because arsenic III and arsenic V need different treatment and a total figure alone will not tell you which you have. Radon should be approached by testing indoor air first, since the soil pathway usually dominates the household risk and the air test is cheaper.

There is no testing-on-sale requirement here comparable to New Jersey's, so commission your own test when buying a property on a well.

Licensing and consent

Home improvement contractors register with the Department of Consumer Protection, and the registration number has to appear in advertising. Plumbing is licensed separately by the state.

One Connecticut-specific point worth knowing as a customer: Connecticut is an all-party consent state for recorded calls. A company recording your call has to tell you. If you are not told, it should not be happening, and that applies to us as much as to anyone else.

Who regulates drinking water in Connecticut

Public water systems in Connecticut are regulated under the federal Safe Drinking Water Act, administered by the state, and every community system must publish an annual Consumer Confidence Report describing what it found in the previous calendar year. Those reports are normally published by July 1.

Private wells sit outside that framework entirely. No agency samples them and no report is issued, so a well owner in Connecticut is the only person who will ever test that water.

Licensing in Connecticut

Registered with the Connecticut Department of Consumer Protection. Registration number available on request.

Every area we cover in Connecticut

Grouped by county. Smaller towns are served through the nearest listed area, so if yours is not here, use the closest one or send us your address.

Names shown as links have a local page with sourced water data for that town. The rest are areas we serve where the research is not yet published, so there is nothing local to read yet. Either way, send us your address.