The water violation for Margaretta Township has been corrected, according to the Ohio EPA.
In February, the Ohio Environmental Protection Agency cited Erie County's water system for violating contaminant standards for drinking water in the Margaretta area. The violation was for exceeding the EPA's standards for total trihalomethanes, a chemical produced when drinking water is disinfected.
Dina Pierce, EPA spokeswoman, said though it was a violation, there aren't immediate health risks from trihalomethanes.
"With trihalomethanes, the health risk is really over long-term use like a decade or two decades," she said. "If it hits over it for a little bit, it's not really an immediate problem."
Since the violation, the trihalomethane level average has returned to compliance, according to a March sampling. Pierce said routine maintenance has helped to bring the level down.
The level of trihalomethanes increases when chlorine reacts with organic material, such as algae, in untreated water. If the water sits in the system for a while, it allows the reaction to take place. The area's water is drawn from Sandusky Bay, which routinely has issues with algae growth.
Pierce said though there is no longer a violation, the area isn't in the clear.
"A lot of it depends on if they get another big algae growth. This is the first time they've had a violation for this. We don't expect them to violate again, but we'll keep an eye on it," Pierce said.
Jack Meyers, Erie County sanitary engineer for the Department of Environmental Services, did not return calls for comment.