At-large Councilman Michael Brown will appear on the November ballot after regulators ruled Monday that although nearly one-third of the signatures he submitted in support of his campaign were invalid, he submitted enough signatures to qualify for re-election.

Dorothy Brizill, a longtime government watchdog, and David Grosso, one of Brown’s general election opponents, filed separate challenges last month to Brown’s petitions, arguing that signatures were forged, illegible or from unregistered voters.