Commonwealth Edison and Asbestos Exposure: Product History and Legal Record

Commonwealth Edison, commonly known as ComEd, operated for decades as one of the largest electric utility companies in the United States, serving millions of customers across the Chicago metropolitan area and northern Illinois. As with many major utility operators of the mid-twentieth century, the infrastructure supporting ComEd’s power generation and distribution network relied heavily on industrial materials that are now understood to pose serious health risks. According to asbestos litigation records, workers employed at ComEd facilities and power plants were potentially exposed to asbestos-containing materials — particularly pipe insulation and related thermal systems — throughout much of the postwar industrial era.

This article is intended as a factual reference for workers, their families, and legal professionals researching historical asbestos exposure at Commonwealth Edison facilities.

Company History

Commonwealth Edison traces its origins to the early electric utility industry in Illinois, eventually becoming the primary electric service provider for the Chicago region and surrounding areas. As a large-scale utility company, ComEd operated multiple coal-fired and nuclear power generation stations, along with an extensive network of transmission infrastructure, substations, and maintenance facilities.

Power generation facilities of this era were among the most asbestos-intensive industrial environments in the United States. High-pressure steam systems, turbines, boilers, and the miles of pipe connecting them required robust thermal insulation to operate safely and efficiently. From the 1940s through the late 1970s, asbestos-containing insulation products were the industry standard for these applications, prized for their heat resistance, durability, and low cost.

ComEd’s power stations — including facilities such as Crawford, Fisk, Dresden, and Zion — employed large numbers of maintenance workers, pipefitters, insulators, boiler operators, and contractors whose work brought them into regular contact with the thermal insulation systems that court filings document were present throughout these plants.

Asbestos-Containing Products

Commonwealth Edison did not manufacture asbestos products. Rather, according to asbestos litigation records, the company purchased and installed asbestos-containing materials produced by third-party manufacturers throughout its power generation and distribution infrastructure.

The primary category of concern documented in litigation is pipe insulation. In mid-century power plant environments, pipe insulation served a critical function: protecting workers and equipment from the extreme heat generated by high-pressure steam systems while also maintaining operational efficiency. Asbestos-containing pipe insulation was standard in this context and was applied to:

  • High-pressure steam lines
  • Boiler feed water pipes
  • Turbine bypass piping
  • Condenser systems
  • Auxiliary and service piping throughout plant structures

Court filings document that pipe insulation at utility facilities of this type typically contained chrysotile, amosite, or a combination of asbestos fiber types, embedded in materials such as calcium silicate, magnesia, or woven cloth jacketing. These products were manufactured by companies including but not limited to Owens-Illinois, Johns-Manville, Armstrong, Owens Corning, and other established insulation suppliers active during this period.

Plaintiffs alleged that asbestos-containing pipe insulation was present throughout ComEd’s power generation facilities and that this material was subject to regular disturbance during maintenance, repair, and replacement activities — conditions known to release respirable asbestos fibers into the surrounding air.

Beyond pipe insulation, asbestos litigation records associated with utility industry defendants of this era frequently document the presence of related asbestos-containing materials in similar facilities, including boiler block insulation, turbine insulation blankets, rope gaskets, packing materials, and insulating cement. Whether these specific materials were present at particular ComEd locations is a matter for individual legal and factual investigation.

Occupational Exposure

According to asbestos litigation records, the workers most frequently identified as having potential asbestos exposure at Commonwealth Edison facilities include:

Pipefitters and Steamfitters — These tradespeople worked directly with and around insulated pipe systems. Their work involved cutting, fitting, and repairing piping components, often requiring the removal or disturbance of existing pipe insulation. Plaintiffs alleged that this work regularly generated airborne asbestos dust in enclosed or semi-enclosed plant environments.

Insulators (Asbestos Workers) — Journeymen insulators applied, repaired, and removed thermal insulation throughout ComEd’s plant systems. Court filings document that insulators in utility plant settings worked with raw insulation materials, pre-formed pipe covering, and insulating cement — products that released asbestos fibers when mixed, cut, or handled.

Boiler Operators and Maintenance Workers — Employees responsible for the day-to-day operation and upkeep of boiler systems worked in close proximity to heavily insulated equipment. Even workers who did not handle insulation directly were potentially exposed through bystander exposure as nearby trades disturbed asbestos-containing materials.

Electricians and General Maintenance Workers — As plaintiffs alleged in numerous utility industry cases, electricians and general plant maintenance workers often performed their tasks in areas where pipefitters or insulators were simultaneously working, creating conditions in which asbestos dust from nearby activities could be inhaled.

Outside Contractors — ComEd facilities, like most large industrial plants of this era, regularly employed outside contractor tradespeople for specialized maintenance, overhaul, and construction projects. According to asbestos litigation records, contracted workers frequently performed the most intensive insulation-related tasks — such as boiler overhauls or pipe system replacements — and may have had significant exposures concentrated over shorter periods.

The occupational health significance of these exposures is well established in the medical and scientific literature. Asbestos-related diseases — including mesothelioma, asbestosis, lung cancer, and pleural disease — typically have latency periods of 20 to 50 years between initial exposure and diagnosis. Workers employed at ComEd facilities during the 1940s through the early 1980s who are now experiencing respiratory illness or a cancer diagnosis should consider whether asbestos exposure may be a contributing factor.

Asbestos use at Commonwealth Edison facilities is understood to have declined substantially through the late 1970s and into the early 1980s, consistent with increasing regulatory restrictions under the Clean Air Act and EPA guidelines, as well as the broader withdrawal of asbestos products from the commercial market.

Legal Tier: Litigated — No Established Bankruptcy Trust

Commonwealth Edison is classified as a Tier 2 entity on this reference site. The company has been named in asbestos litigation and appears in court filings in connection with worker exposure claims. However, according to available legal records, Commonwealth Edison has not filed for bankruptcy protection as a result of asbestos liability and has not established an asbestos bankruptcy trust fund.

This distinguishes ComEd from manufacturers such as Johns-Manville or Owens Corning, which created structured settlement trusts that provide compensation through a claims filing process. Because no ComEd-specific asbestos trust exists, individuals with exposure claims cannot file directly against a trust administered on the company’s behalf.

This does not mean that legal options are unavailable. Individuals who were exposed to asbestos at ComEd facilities may have viable claims along several potential avenues:

  • Direct civil litigation against ComEd or its successors, based on premises liability or other legal theories, as courts have addressed in prior filings
  • Product liability claims against the manufacturers of the asbestos-containing insulation products that were installed at ComEd facilities — many of whom have established bankruptcy trusts that accept claims from workers exposed to their specific products
  • Claims against multiple parties, given that exposure in a utility plant setting typically involved products from numerous manufacturers, several of which maintain active trust funds

Workers or surviving family members considering legal action should document the following to the extent possible: specific ComEd facilities where work was performed, approximate dates of employment or contract work, job titles and descriptions of specific tasks, and any co-workers or contractors present who may serve as witnesses to conditions at the time.

Summary

Commonwealth Edison operated major power generation and distribution infrastructure across northern Illinois from the mid-twentieth century through the present. According to asbestos litigation records, the pipe insulation and related thermal materials installed throughout ComEd’s power plants contained asbestos, and plaintiffs alleged that workers — including pipefitters, insulators, boiler workers, and outside contractors — were exposed to asbestos fibers released during the installation, maintenance, and removal of those materials.

ComEd has not established an asbestos bankruptcy trust, so compensation options differ from those available against trust-fund defendants. However, workers exposed at ComEd facilities may still have legal options through direct litigation or through trust fund claims against the manufacturers of asbestos products used at those sites.

Anyone who worked at a ComEd power plant or utility facility between approximately 1940 and the early 1980s and has since been diagnosed with mesothelioma, lung cancer, asbestosis, or related pleural disease should consult with an attorney experienced in asbestos exposure litigation to evaluate the full range of available claims.