Tasracing has dismissed three stewards and stood down another after an integrity investigation found they had been betting on races.

Tasmanian racing’s regulator confirmed the three dismissals on Friday after the findings from an investigation by Tasmanian racing integrity commissioner, Sean Carroll.

It established that a number of racing stewards, including the acting chief thoroughbred steward, placed more than 200 bets across a two-and-a-half-year period.

According to a statement published by the ABC, Tasracing said two of the dismissals were for betting-related transgressions, while the third was for serious misconduct.

"Based on independent investigations and subsequent report findings provided by the Tasmanian Racing Integrity Commissioner, TasRacing has dismissed three stewards due to inappropriate wagering activity or other misconduct and breaches of policy and/or rules," a spokesperson said.

"One steward remains stood down while investigations continue."

Carroll led an audit of betting accounts, which started in March, and discovered the transgressions.

The report revealed that most of the bets were made while the stewards were employed by the former Office of Racing Integrity, which was dissolved last year.

According to the ABC, some of the bets were placed on races that the stewards were officiating. The overall bet totals were $1400 for one steward and $275 for another.

Carroll confirmed there was no finding of any criminal conduct, breaches of law, collusion or race fixing, but said there was “the potential to compromise confidence in the integrity of racing, and that any form of wagering by stewards must be treated seriously".