Residents across Cobb, DeKalb and Gwinnett counties reported Monday wrongfully receiving calls about the city of Atlanta boil water advisory.

Atlanta issued a boil water notice Monday morning because of a pump problem at the Hemphill Water Treatment Plant and Pumping Station, according to The Atlanta Journal-Constitution.

None of the counties have reported having any problems with their water systems.

Cobb spokesman Ross Cavitt said the calls came from "NotifyATL," which is the city of Atlanta's mass notification system that launched in 2015.

People can sign up online for the free service for notices about "severe weather, unexpected road closures, missing persons and evacuations of buildings or neighborhoods as well as community events and crime alerts," according to the city.

“Apparently if you ever signed up for NotifyATL notifications you got the alert,” Cavitt said. “Many in the metro area that travel to Atlanta signed up for primarily traffic reasons.”

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Gwinnett sent out a news release later Monday saying its water was safe for all uses. The county wanted to assure people that Atlanta had "mistakenly" sent the boil water advisory to some Gwinnett residents and that the water systems are not connected.

The city of Atlanta did not immediately confirm that it had sent the robocalls.

Of course, some addresses in those counties list Atlanta as their city. But, Cavitt said, “we received hundreds of calls from different parts of the county that were clearly not in the Atlanta mailing area.”

Some DeKalb residents reported receiving robocalls about a boil water county in their area, but county spokesman Andrew Cauthen said DeKalb hasn’t sent notifications about an advisory.

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“We’re not doing a robocall,” Cauthen told The AJC. “So, for someone to get a robocall message they more than likely signed up for a city of Atlanta notification.”

Cauthen said only one person is authorized to send a robocall from DeKalb, and because the county didn’t send the call they have no way of knowing how many residents may have gotten one from the city of Atlanta.

Toco Hills resident Deborah Beck told The AJC she received a call from Atlanta Watershed Management stating her area was under a boil water advisory.

“I was surprised because we pay DeKalb Watershed Management,” she said. “…It’s very unclear to me. For the moment, I’m boiling water.”

Gwinnett spokesman Joe Sorenson said he didn’t know how many reports they’ve gotten of Gwinnett residents getting the robocalls.

But Gwinnett’s water is fine, he said.

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The outage was caused by a failure at the water plant.