A water advisory for certain Salem residents is still in effect Thursday. It likely won't be lifted until Friday.

The results of a water samples taken Wednesday show nominal levels of cyanotoxins, the unhealthy bacteria that caused the advisory, said officials Thursday. The city needs two consecutive days of clean water samples to lift the advisory.

The advisory applies to children younger than 6; people on dialysis or with compromised immune systems; pregnant or nursing women; the elderly; and pets.

It also affects Salem, Turner, the Suburban East Salem Water District and Orchard Heights Water Association.

The city's tap water shows traces of cyanotoxins, which are released by blue-green algae blooms that have appeared in Detroit Lake over the past few weeks. The advisory was issued Wednesday -- four days after a nearly week-long one was lifted.

Eight water distribution sites have been set up:

Wallace Marine Park, 200 Glen Creek Rd. NW, Salem

Oregon State Fairgrounds, 2330 17th St. NE, Salem

Bush's Pasture Park, Mission St. entrance, 600 Mission St. SE, Salem

Woodmansee Park, 4629 Sunnyside Rd. SE, Salem

Chemeketa Community College, Brown Parking Lot, 4000 Lancaster Drive NE, Salem

East Salem Suburban Water District, 3805 La Branch St. SE, Salem

City of Keizer Civic Center, 930 Chemawa Rd NE, Keizer

Former Chevrolet Dealership, 5325 Denver Street, Turner

All the sites will operate around the clock, except for East Salem Suburban Water District, which will close at 8 p.m.

To use the distribution system, residents are asked to pull through in their cars, hand off containers that they bring to volunteers who will fill them. There is a 5-gallon limit per family.

Residents in need of assistance are advised to call the Public Works Department at 503-588-6311.

For medical information, call 211.

The city also now posts water sampling information publicly. That can be found on its website or Facebook page.

-- Molly Harbarger

mharbarger@oregonian.com

503-294-5923

@MollyHarbarger