ALBANY, Ga. — Georgia is preparing to step up its offensive in the long-running battle with its neighbors over federal water rights. It plans to focus on Florida's environmental record and dredging up a 150-year-old ruling that could give Alabama less control of a key river, Gov. Sonny Perdue told The Associated Press Thursday.

Perdue said he was prepared to play "hardball" with his neighbors in the regional fight over water rights after a federal judge issued a ruling last month that could restrict metro Atlanta from tapping its main water source.

"I'm very much of a consensus builder. I'm prepared to negotiate in good faith," Perdue said. "But I think all the facts have to be laid on the table. At some point, you just can't allow people to just throw stones at you and throw stones at you. I've learned at some point you run out of cheeks to turn."

He said Georgia's strategy will focus on an 1859 U.S. Supreme Court ruling that established Georgia's boundary along the western edge of the Chattahoochee River, which is shared by the three states. He said it could require Alabama officials to request key withdrawal permits from Georgia.

Alabama Gov. Bob Riley said Georgia already has raised that issue in court without success. "It has about as much chance of solving Atlanta's water problem as does Gov. Perdue's argument last year that Georgia's border with Tennessee was drawn incorrectly 200 years ago," Riley said. He said Perdue is indulging in "saber rattling and pointless posturing" instead of seeking a compromise.

Noting that Georgia's water use has been scrutinized throughout the litigation, Perdue said Georgia is prepared to turn the microscope on Florida's conservation record, saying the state "doesn't necessarily have a stellar environmental reputation either."

"When I fly over Florida, you know what I see? Canals everywhere. What are they used for? Irrigation, agriculture. If we tried to create the canals that Florida has, we'd be sunk. The beaches of Florida don't look like the barrier islands of Georgia," he said. "Those are the points I'm prepared to make if we want to play hardball."

Florida Gov. Charlie Crist offered only a cryptic response: "I'm very proud of Florida's record, and I think Georgia's done great work and all the United States of America has done well."

The three-state legal battle over federal water rights has been brewing for almost two decades. It intensified in July when U.S. District Court Judge Paul Magnuson found that Georgia had little right to withdraw water from Lake Lanier, the massive federal reservoir that supplies more than 3 million metro Atlanta residents.

Magnuson ruled that serving as a source of drinking water was not among the lake's original purposes and set a three-year deadline for Congress to approve a deal. If that doesn't happen, withdrawals from the north Georgia reservoir could be cut to levels from the 1970s when Atlanta was a fraction of its size.

The deadline sent Georgia's leaders scrambling for a solution. Perdue's approach includes attempting to jump-start negotiations with the neighboring states. He has offered the governors of Alabama and Florida 40 possible dates for a meeting.

Spokesmen for Riley and Crist have said the governors are reviewing possible dates. Riley said earlier Thursday that he had written to Perdue, offering to seek a date and place where the three governors can meet to negotiate.