Today, 19th-century traces of the company include the Civil War-era aqueduct across Rock Creek Park between Georgetown and Foggy Bottom and the gas and electric street lamps installed nearby.

Two petitions were sent to Congress in April 1848, and on July 8 of that year, lawmakers issued the first Congressional charter for a company that would extract gas from coal.

[2] The company was established on the tenth street of the Foggy Bottom neighborhood, and eventually led to the area's urbanization.

Two years later, the company began to build a new, more efficient factory, the West Station Works, between 26th and G Streets NW.

This location, at the head of the Chesapeake and Ohio Canal, gave it access to barges carrying coal from West Virginia and Pennsylvania.

[11] After the deal was closed, CEO and Chairman Terry McCallister retired from WGL and COO Adrian Chapman took the position.

[15] On January 18, 2024 a building on Marion Barry Avenue SE exploded due to a leak on a Washington Gas line.

In 2024, another study found 77% of homes with gas stoves in DC had dangerous levels of nitrogen dioxide,[20] a chemical compound linked to respiratory issues and cardiovascular diseases.