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TIGARD, Ore. A boil-water notice was lifted for the Tigard area after water samples tested negative for bacterial contamination.

Tigard water customers no longer need to boil their water, said Tigard Utility Division Manager John Goodrich. Tigard tap water is now safe to drink.

City of Tigard officials issued the alert Wednesday, effective for most of Tigard, Durham, King City and Bull Mountain.

MAP of affected area

Earlier in the week, two routine water samples showed possible bacterial contamination, Goodrich said. Follow-up samples also tested positive, and prompted a boil water notice. The positive tests indicated the drinking water may have been contaminated with human or animal wastes.

Crews flushed the system Wednesday and test results from the new samples were released just after 8:15 a.m. Thanksgiving morning. They showed no signs of contamination.

Investigators have not yet determined the source of the contamination, but Goodrich did say false positives are fairly common.

The City of Tigard regrets any inconvenience the boil water advisory has caused, especially during the Thanksgiving holiday, he added. While the health risks were extremely low, the city's top priority is to safeguard the health and safety of its water customers.

For more information on possible health effects, visit www.tigard-or.gov.

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