Tests were carried out on the raw Lake Erie water near the city of Toledo’s water-intake crib to check the level of algae toxins. The results today showed a slight rise in the level since Tuesday. The tests have also shown that the amount of microcystin in the treated drinking water of city was still undetectable. As a result, the city’s water quality dashboard status remains at ‘watch’.

This year, no tests of the city’s treated drinking water have registered a detectable amount of toxin.

In a statement, Stacy Weber, a city spokesman, said that today, the test results from the raw lake water samples showed 1.0 parts per billion of the toxins. As compared to test held on Tuesday, revealing 0.8 ppb in the raw lake water, the present reading showed a higher toxin level.

City officials said that the water is safe to drink. On July 27, they detected microcystin in the raw lake water for the first time this year, which measured 0.5 ppb. Since then, fluctuation was noticed in the raw lake water near Toledo’s intake crib. It rose to 4.9 ppb on August 12.

On the early morning of August 2, 2014, Toledo’s treated tap water registered microcystin toxin levels higher than 3 ppb, prompting officials to release a do-not-drink order. The order stayed in effect until midmorning August 4.