Crews found the body of 73-year-old Jean Carson onThursday morning a short distance from where investigators believe she fell in.
Police say Carson went to smoke a cigarette while at a party with friends and never came back.
Bucks County Coroner Joseph Campbell told an area newspaper on Friday that toxicology tests will take about a month to complete to determine whether alcohol was a factor in her death.
Police said Carson, a legal secretary, was attending a Christmas party that night.
According to friends, Carson was in good health and did not suffer from any medical or mental problems.
The Associated Press contributed to this report.