Mayor Eric Garcetti urged the Federal Communications Commission to closely monitor the proposed merger of Comcast and Time Warner and impose conditions to make sure it does not eliminate competition.

“Los Angeles is one of several major markets which will be significantly impacted by the merger and divestiture transactions proposed by Comcast, Time Warner Cable and Charter,” Garcetti wrote in a letter to the commission.

Charter Communications also has a deal pending to acquire some of Comcast and Time Warner’s subscribers.

And, while Comcast has made significant positive investments in the Los Angeles area, Garcetti said he is concerned about the impact on competition in the industry and the impact on consumers.

If approved, it will “provide Comcast with even greater vertical control over the assets used today for the distribution of television and online programming,” Garcetti wrote. “The addition of TWC’s local cable system to Comcast’s assets may extend and expand the concerns that the commission found significant in the NBCUniversal merger to the Los Angeles market.”

The mayor wrote that he is also concerned about the access to programming for consumers, as well as its impact on innovation and keeping an open Internet.

Garcetti said if the FCC does approve a merger, it should impose a number of conditions.

Among the conditions he recommended are preserving network neutrality, ensuring that digital content and application providers are able to reach consumers and ensuring consumers receive adequate customer service.