A water ban is entering its third day in northwest Ohio after tests show some toxins still contaminating Lake Erie.
Toledo Mayor D. Michael Collins says tests done by state and federal authorities indicate a positive trend, but additional testing is necessary.
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The city council is to review the test results at its regularly-scheduled meeting on Monday.
Ohio's fourth-largest city warned residents not to use city water early Saturday. Tests at one treatment plant showed readings for microcystin above the standard for consumption, most likely from algae on the lake.
Residents told not to drink, brush their teeth or wash dishes with the water descended on truckloads of bottled water delivered from across the state on Sunday. The Ohio National Guard is using water purification systems to produce drinkable water.