PORTLAND, Ore. (KOIN 6) — The Portland Water Bureau received a positive test result for total coliform on Friday, and will raise the chlorine levels next week by 14%.
The city is not required to issue a boil water alert.
On Saturday, test results were negative and the water is fine. Routine testing will resume on Monday. PWB said they conduct about 250 tests per month.
Five of their samples must come out positive before they need to send out a letter to customers.
In September 2013, PWB sent a letter to customers in Southwest Portland after getting a series of positive samples for total coliforms.
Total coliform is a type of bacteria that can be dangerous to babies, the elderly and people with compromised immune systems.