UPDATE: Portland water officials say tests Wednesday show that water for about 570 homes is safe to drink, and that a water boil notice has been lifted.
The water customers affected live in the area of Southwest 30th Avenue and Vermont Street.
Officials were concerned the water may have been contaminated after nearby construction work caused the water pressure to drop.
Water officials asked residents to boil their water as a precaution.
PORTLAND, Ore. - The Portland Water Bureau is asking some water customers in Southwest Portland to boil their water after work on a pipe caused a loss of water pressure.
City officials say less than 600 water customers in the area of Southwest Portland near 30th Avenue and Vermont Street are affected.
Water officials say it is unlikely that your water was contaminated, but as a precaution they want you to boil your water before using it for drinking or other things like adding it to food or baby formula. They say the pressure loss may have let bacteria, viruses and parasites into the water system.
Those organisms could cause diarrhea, nausea, cramps and headaches.
Officials say they will inform the public when the water is again safe to drink without boiling it. They expect lab tests back at about noon Wednesday.
Boil the water for one minute and let it cool before using. You can also use bottled water.
Here is the link to the city's news release that contains more information.