Corrected version: Story updated on Monday, Oct. 19, 2015 at 5:54 p.m. to correct the concentration of microcystin detected in Monday’s sample.

Toledo’s water quality dashboard status remained at “clear” today after tests for microcystin in Lake Erie water continued to show small concentrations of the algae toxin.

The city reported today that the level of algal toxins in raw Lake Erie water near its water-intake crib was 0.112 parts per billion. That is higher than the 0.051 ppb detected Sunday.

The city moved the dashboard status from “watch” back to “clear” on Oct. 7 for the first time since July after microcystin concentrations dropped to the lowest level since daily testing began over the summer.

No toxins have been detected in the city’s treated drinking water and it has remained safe to drink throughout the summer’s algae season, city officials say.

The city's water supply was deemed undrinkable Aug. 2-4 last year when the toxin contaminated the water at the treatment plant.

City officials first moved the dashboard status to “watch” after they detected microcystin in the raw lake water for the first time this year on July 27, when it measured 0.5 ppb. Since then the levels in the raw lake water near Toledo’s intake crib have fluctuated, rising as high as 4.9 ppb on Aug. 12.

The U.S. EPA in May declared it acceptable for people of school-age and older to drink tap water with up to 1.6 parts per billion of microcystin in it. The limit for infants and children younger than 6 years old, pregnant women, nursing mothers, people with liver conditions, and those on dialysis is 0.3 part per billion, the EPA said.

Both numbers are based on 10-day averages and updated a 1998 World Health Organization advisory, which recommended tap water across the world contain no more than 1.0 ppb of the toxin.

First Published October 19, 2015, 8:16 p.m.