Serving Stonington, Mystic, Pawcatuck and Old Mystic, 06378, 06379 and 06355

Water Heater Repair in Stonington, CT

About three in ten Stonington homes were built before 1940, and most heat with oil. Depending on the village, your water may come from Aquarion or from Westerly across the state line. If your water heater has quit or is leaking, call and get a plumber out.

Call for service(858) 465-8561 What's different in Stonington

One callStraight to water heater help
Repair or replaceHonest advice on which makes sense
All major brandsRheem, A.O. Smith, Bradford White, Rinnai, Navien
Local to youPlumbers who work in your town

Stonington at a glance

What shapes water heater trouble in Stonington

31%

of Stonington homes were built before 1940

Source: US Census Bureau

56%

heat with oil

Source: US Census Bureau

2 gpg

average hardness of Aquarion's Mystic System water

Source: Aquarion Water Company

$10

to drop off a large water heater at the transfer station

Source: Town of Stonington

Water

Aquarion or Westerly water

Aquarion's Mystic System serves about 11,740 people. Its 2025 report says the water comes from the Palmer and Dean's Mill reservoirs, the Lantern Hill Well and water bought from Groton, with the reservoirs supplying about 84% of the 1.26 million gallons used on an average day. Reservoir water is filtered at the Dean's Mill plant in Stonington. Hardness averaged 2 grains per gallon in 2025, which is soft. In April 2026 Aquarion also took over the small Arlington Acres water system in town.

Pawcatuck is different. Rhode Island's health department says the Westerly Water Department serves about 2,400 customers in the Pawcatuck area of Connecticut.

Housing

Old homes, oil heat

About 31% of Stonington's homes were built before 1940, and 71% are detached houses. About 56% heat with oil, 15% with electricity, 14% with gas and 13% with propane. Eversource lists Stonington among its Connecticut gas towns.

The town's sewer systems cover Mystic, Old Mystic, Pawcatuck and Stonington Borough, each with its own treatment plant. The rest of town uses private septic systems. The Water Pollution Control Authority is at 860-535-5065.

Permits

Water heater permits at the counter

Stonington's FAQ says electrical, plumbing and mechanical work each need their own permit, priced on the cost of the work, and that no work may legally start before the permit is on site. On water heaters specifically, it says applications are processed at the counter. Other building permits go through the town's online portal, which replaced paper permits in May 2021.

Old tank

Transfer station fees

The transfer station at 151 Greenhaven Road in Pawcatuck charges $10 each for large bulky items, and its fee list names large water heaters. It's open Monday, Tuesday, Thursday and Friday from 9 a.m. to 3 p.m., Saturday from 8 to 3 and Sunday from 8 to 1, and closed Wednesday. You'll need a resident sticker, which takes your driver's license and vehicle registration. The Solid Waste office is at 860-535-5099.

Before the plumber arrives

Safe steps for Stonington homes

Leaking? Close the cold water valve on top of the tank.
Turn off the gas valve or the breaker for the heater.
Gas smell? Eversource serves parts of Stonington. Leave the house, call 911 from outside, then Eversource at 877-944-5325.