MARENGO, Iowa [KCCI] — The Environmental Protection Agency says the owner of C-6 Zero could face criminal charges. C-6 Zero is the company that owned the plant in Marengo that exploded in December 2022. Around a dozen people were injured in the explosion.

Last week, the EPA sent a letter to the company’s lawyers. It lists multiple incidents where the company failed to comply with environmental and safety regulations, before and after the explosion. Some of the infractions include failure to have electrical up to code, improper labeling of hazardous chemicals and inadequate operating procedures.

The documents allege C-6 Zero may be trying to open a similar plant in Idaho.

The company has been fined over $1.6 million by multiple agencies. They also face lawsuits filed by former employees and investors for damages.