Attorney General Tong on Thursday that the state is suing 28 chemical manufacturers for knowingly contaminating Connecticut's water and harming public health with toxic PFAS.

The suit alleges that the companies knew decades ago that the PFAS, also known as "forever chemicals," were causing significant harm to humans. 

The chemicals are called “forever chemicals” because the CDC notes they do not break down naturally in the environment.

Tong says the two lawsuits demand that these companies disclose all their research and pay the state for past and future remediation and testing expenses. 

"We are going to go after them hard, and we are going to hold them accountable and try to keep the liability where the law is, which is with the original polluter," said Tong. 

Tong says remediation in Connecticut will cost billions of dollars.