TOLEDO, Ohio – More tests are needed to ensure that toxins are out of Toledo’s water supply, the Ohio city’s mayor said Sunday, instructing the 400,000 people in the region to avoid drinking tap water for a second day.
Mayor D. Michael Collins said that new samples showing decreased levels of toxins in the water are a positive sign.
Toledo officials issued the warning early Saturday after tests at one treatment plant showed two sample readings for microsystin above the standard for consumption, possibly because of algae on Lake Erie, the shallowest of the five Great Lakes.
The city also said not to boil the water because that would only increase the toxin’s concentration. The mayor also warned that children should not shower or bathe in the water and that it shouldn’t be given to pets.
Algae blooms during the summer have become more frequent and troublesome around the western end of Lake Erie. The algae growth is fed by phosphorus mainly from farm fertilizer runoff and sewage treatment plants, leaving behind toxins that have contributed to oxygen-deprived dead zones where fish can’t survive. The toxins can kill animals and sicken humans.