In September, 8.2 million gallons of water were used daily, down from 11.5 million gallons in August.
OWASA Executive Director Ed Kerwin said he has been pleased with the response to the drought from the community.
"Customers have done a good job watching their usage," he said. "Now we have to look indoors."
OWASA banned the use of its water outdoors Sept. 9 following a board of directors decision to enact emergency water measures.
The goal of the tightened restrictions was to reduce overall water use by 25 percent, a goal consumers exceeded last month.
But outdoors is where the feasible enforcement of OWASA's authority ends.
"We can't control what people do with water in their own homes for the most part," Kerwin said. "All we can do is attempt to educate our customers and hope they stay vigilant."
While the drop in consumption is a big step in OWASA's battle against the drought, the utility's reservoirs are still projected to go dry in 2003. Kerwin said things may get worse before they get substantially better.
"We're not going to run out in December at this point," he said. "But we might by spring or summer. The situation is still very serious."