New Orleans-area riverboat casinos’ revenue slipped 2.8 percent to $19.7 million in September, while Harrah’s New Orleans Casino’s revenue inched upward by less than 1 percent to $24 million.

Overall, Louisiana’s 14 riverboats, Harrah’s land-based casino and slots at four racetracks brought in $182.8 million in September, up 0.3 percent over the year-ago figures.

New Orleans’ three riverboats, Harrah’s land-based casino and slots at the Fair Grounds brought in $47.2 million, according to figures released Thursday by Louisiana State Police. That compares with the $47.6 million in winnings brought in during September 2013.

September marked the second consecutive month that the New Orleans riverboats’ revenue fell. Two of the market’s three riverboats reported lower receipts. The Amelia Belle dipped to $3.7 million, compared to $4 million a year ago, while Treasure Chest slipped $300,000 to $7.3 million. Boomtown New Orleans’ revenue was up slightly at $8.7 million.

The Fair Grounds also saw revenue dip by about $26,000, or 0.7 percent, to $3.5 million.

The New Orleans area was the only region in the state that reported a drop in riverboat revenue. Statewide, riverboat casino revenue grew 1.1 percent to $129.6 million in September.

The Lake Charles area was the biggest gainer. Its two riverboat casinos upped their take to $38 million, an increase of 2.4 percent.

Baton Rouge’s three riverboats inched upward to $21.1 million, compared to $20.9 million a year ago. L’Auberge and Hollywood Casino revenues were down slightly, at $11 million and $5.4 million, respectively. The Belle of Baton Rouge’s revenue was up $200,000 to $4.7 million.

The Opelousas market, represented by the slots at Evangeline Downs, dropped 8.4 percent to $6.5 million.

The Shreveport-Bossier City market saw a 1.7 percent gain to $50.8 million at the area’s six riverboats, which offset an 8.3 percent decrease from the slots at the Harrah’s racetrack in Bossier City.

Follow Ted Griggs on Twitter, @tedgriggsbr.