Manassas-based American Disposal Services has been acquired by Waste Connections Inc. of Toronto.

The companies announced the deal Monday, noting American was one of the largest privately-owned solid waste collection and recycling businesses in the Mid-Atlantic.

American has annual revenues of approximately $175 million and serves 400,000 customers in Virginia, Maryland, Georgia and Colorado, according to a news release.

American is the market leader in Northern Virginia, where the majority of its assets are located, noted Waste Connections CEO and Chairman Ronald J. Mittelstaedt.

“In addition to providing new market platforms for future growth opportunities in both Virginia and Georgia, this acquisition also enhances our market positioning in Denver, where American’s collection services will be tucked into our vertically integrated operations,” Ronald J. Mittelstaedt said. “We are excited to welcome American into the Waste Connections family.”