Written by Michelle Whitmer | Scientifically Reviewed By Arti Shukla, Ph.D. | Edited By Walter Pacheco | Last Update: June 20, 2023

Quick Facts About Asbestos in Connecticut
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Naval yards and shipping hubs have driven the state’s economy for decades. But these job sites also posed prominent asbestos threats to employees. Shipbuilders and sailors were at high risk of inhaling asbestos. It was a common insulator on private and U.S. Navy vessels.

Workers at aircraft manufacturers, metal works and chemical plants were also at high risk for asbestos exposure. Employees at Connecticut’s former asbestos mine faced a high risk of exposure.

The state had several other serious asbestos threats. Examples include the helicopter manufacturer Silkorsky Aircraft and the Quinebaug cotton mill. Simpkins Industries Paper Mill and Hersey Metals Co. also used asbestos. Hundreds of other industrial plants relied on asbestos as insulation for machinery. This exposed employees to the fibers during daily operations.

Many of Connecticut’s historic buildings contained asbestos-contaminated construction materials. Public buildings such as Berlin Town Hall and Bethel Church had asbestos. Many private buildings and residences also contain asbestos.

In December 2021, Connecticut allocated $2.5 million to fund the remediation of asbestos at a Raymark Industries site. Located in Stratford, Raymark manufactured automotive breaks containing asbestos for almost 80 years.

Occupations and Environmental Areas at Risk

Many Connecticut jobs are tied to marine industries. Groton was named “The Submarine Capital of the World,” and the city’s Electric Boat Company was the U.S. Navy’s leading submarine contractor. The state was also a leading manufacturer of clipper ships in the 19th century, and Navy submarines in the 20th century.

Quinebaug Mill

Quebec Square Historic District is home to older industrial sites, including Quinebaug Mill. Built in 1856, the mill site included several buildings. All the buildings had asbestos-shingle roofs. Several of the residential houses for the millworkers also used asbestos siding.

Connecticut Asbestos Mine

Located on Steel Road near Nepaug in Litchfield County, this unnamed mine was a past producer of anthophyllite asbestos. Mesothelioma, lung cancer and asbestosis can develop after exposure to anthophyllite asbestos.

For example, a study reported four mesothelioma cases among 736 anthophyllite miners. Experts expected only one case based upon exposure conditions. Researchers noted that lung cancer increased with anthophyllite exposure and cigarette smoking.

Connecticut Shipyards

Shipyards used asbestos for the first three-quarters of the 20th century. The fibers became a waterproof insulator. Pipes, gaskets and other machinery contained asbestos materials.

Shipyards and ships had many confined workspaces that contained asbestos. High concentrations of asbestos circulated in the air. Poor ventilation in the tight work quarters caused fibers to become trapped.

Shipyards in Connecticut:

  • Derecktor Shipyards
  • Groton Ironworks – Noank Campus
  • Seabury & Eugene S. Belden Shipyard
  • Groton Ironworks – Thames River Campus
  • Robert Palmer and Son Shipyard – Noank
  • Eastern Shipbuilding
  • Gilbert Transportation Company Yard
  • Mystic Shipyards
  • General Dynamics Electric Boat Company
  • Thames Towboard Company of New London

Shipyard workers and Navy veterans have higher rates of mesothelioma because of the exposure they endured. Some of their family members also got sick from secondary asbestos exposure.

Military Buildings

The Bradley Air National Guard squadron headquarters harbored many asbestos products. Located in Granby, Connecticut, it used corrugated asbestos in their airplane hangars. Asbestos metal was a favored roofing material.

In 2009, workers removed asbestos-containing floor mastic and caulking. Previous abatement and air sampling took place at the facility in 2006.

The New London Naval Submarine Base on the Thames River in Groton was the world’s largest submarine base. By 1959, the base employed 8,210 active personnel. The base also had its own conversion and repair unit. Workers replaced or removed asbestos from submarines at the unit.

In 2008, workers removed asbestos from the New Haven Coast Guard buildings. It cost $398,000. Earlier, the Coast Guard Academy’s Chase Hall B Annex found asbestos tiles. The Coast Guard Museum was also closed in 2011 for asbestos abatement.

Other Exposure Sites

Connecticut was also home to many industrial companies that used asbestos. Chemical factories, power plants and manufacturing plants were all high-risk sites.

Some Connecticut-based companies may have exposed their employees to asbestos. Examples include the Connecticut Yankee Atomic Power Plant and Millstone Power Plant. The Smurfit-Stone Container Corporation also used asbestos.

Asbestos was a common construction material until the 1980s. Companies built many of the buildings in Connecticut with asbestos products.

Asbestos-contaminated buildings in Connecticut:

  • Arbor Acres Farm
  • Grayledge Farms
  • Mass Mutual/Connecticut Mutual
  • Southern Connecticut State University – Engelman Hall
  • CT Healthcare System – West Haven Branch
  • Felician Sisters Convent
  • Manchester Parkade Shopping Complex
  • Penfield Reef Lighthouse
  • Wesleyan University – North College Building

Homes built before the 1980s likely contain asbestos building materials. Homeowners should not disturb materials that may contain asbestos. It is important to hire professionals for asbestos testing and abatement.

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