"Did you see this report? Again, a high school student could take this report and determine that kids were being poisoned," Rep. John Mica (R-Florida) said.

"That's cheap. 'Oh yeah, we just got regrets.' That's cheap. That's cheap," Rep. Jason Chaffetz (R-Utah) said.

"You have to look at how the law works," McCarthy said.

"Yeah, well, it failed. You failed," Chaffetz said.

Lawmakers also pointed fingers at Michigan's governor, Rick Snyder.

"Plausible deniability only works when it's plausible, and I'm not buying that you didn't know about any of this until October 2015. You were not in a medically induced coma for a year, and I've had about enough of your false contrition and phony apologies," Rep. Matt Cartwright (D-Pennsylvania) said.

"I agree the EPA should've snatched control out of Gov. Snyder's hands even sooner than they did, but Gov. Snyder's administration caused this horrific disaster and poisoned the children of Flint," Rep. Elijah Cummings (D-Maryland) said.

While Congress members seem to agree on who they think is at fault, they can't seem to agree on how to fix the problem.

A bill to help residents in Flint is stalled in Congress over disputes about how it would be funded.