With every glass Christine Oliver fills with water in her Canfield home, she wonders how much each one will cost.

"I really hope our next bill isn't anything like this," she says.

Her latest water bill is for more than $600.

"I called to get a reading for the last few years on our bill for consumption. In 2016 we had used 15,000 gallons, 11,000 in 2017, and last year it was 7,000 gallons. When I added the three together, it was still 1,000 less than this year," Oliver said.

After being told her home's auxiliary meter used 34,000 gallons - she knew the math didn't add up.

"I almost had a heart attack," said Emily Detwiler, who lives a few streets away.

"Normally, it's $100 to $200. Ours went up a little when we had our sprinklers put in," she says. "The one that we got recently that's actually due this month is $901."

We talked to both the mayor and city manager who say they don't know of any specific reason for the discrepancies, but also say they need water customers' help to get to the bottom of it.

"If they have a discrepancy in their bill that they think they have a question on, they should come in and see our city manager. Bring the bill, and he will look at it and review it and go from there," said Mayor Richard Duffett. "We don't know if there's a meter problem or not, but right now, we think that it's an accurate reflection."

But residents stunned by their latest bill say that reflection doesn't hold water.

"There's us two and my one-year-old, the sprinklers hadn't been on, and so there was really no explanation," said Detwiler.