They say Chemours needs to connect them with city water instead:

Two residents participating in a pilot study that is testing whether water filter systems can remove GenX and similar contaminants say they prefer municipal water lines. The residents — Mike Watters and Fran Minshew — said they made the decision after seeing test results Chemours sent to the state Department of Environmental Quality. Their homes are among six with the granular-activated carbon filtration systems.

Chemours has offered to install the filter systems at homes with wells that have GenX levels above the state’s provisional health goal for the compound. Thus far, the state has said the filters would not be approved as a long-term solution.

This is (of course) typical of how most private corporations approach remedial actions when they contaminate water wells. Trying to avoid the expense of running water lines to these people, they use these on-site "fixes" as a test program, and they get to run the tests. When have you ever heard one of these companies say, "Oh, this is not working like we'd hoped."? Exactly, never. And these folks are also worried about continued support from Chemours going down the road, because apparently the filtration systems need a lot of maintenance:

Customers should not have to pay for Duke Energy's negligence:

State utilities regulators late last month decided that both North Carolina divisions of the country’s No. 2 power company could charge ratepayers the first $778 million chunk of a cleanup projected to cost about $5 billion.

North Carolina Attorney General Josh Stein said he’s going to court to try stopping Duke Energy from passing along its costs to excavate some ash pits and cover others. Corporate mismanagement increased costs that shareholders should also be forced to bear, he said in an interview. Duke Energy said that it followed industry practices and applicable regulations. “This case will ultimately be decided by the North Carolina Supreme Court,” Stein said.

Bolding mine, because that's a big reason Republicans have been putting so much money and effort into stacking said Court. It's not just to shield them from consequences of passing unconstitutional laws, although that is a factor. Providing legal cover for big business to take advantage of NC citizens will ensure those maximum campaign donations keep flowing in. But one of the most frustrating things about these Utilities Commission rulings is their grossly imbalanced effort to appear balanced: