Authorities said on Sunday an oil-train derailment and fire has damaged essential city services in a small Oregon town.

The Mosier waste water treatment plant and sewer system are not operational as a result of the spectacular derailment on Friday of 16 of the 96 tank cars on a Union Pacific train.

The area around the train remained evacuated on Sunday, and officials were conducting continuous water and air monitoring.

Authorities were working to clean up an oil sheen in the Columbia river near the scene of the derailment, and the oil inside the remaining tank cars was being moved to trucks.

Residents of Mosier were being asked to boil any water they used for drinking or cooking, as a precaution.

“Today’s priority is focused on safely restoring essential services to the community of Mosier as soon as possible,” incident spokeswoman Judy Smith of the US Environmental Protection Agency said in a statement.

“I want to apologize to the community,” Union Pacific spokeswoman Raquel Espinoza said at a news conference on Saturday, adding that the company would pick up the tab for the response costs. “This is the type of accident we work to prevent every day.”

Including Friday’s incident, at least 26 oil trains have been involved in major fires or derailments during the past decade in the US and Canada, according to Associated Press analysis of accident records from the two countries.

The worst was a 2013 derailment that killed 47 people in Lac-Megantic, Quebec. Damage from that accident has been estimated at $1.2bn or higher. At least 12 of the oil trains that derailed over the past decade were carrying crude from the Bakken region. Of those, eight resulted in fires.

Since last spring, North Dakota regulators have required companies to treat oil before it’s shipped by rail to make it less combustible.

No injuries have been reported from the Oregon derailment, but state health officials are asking people with questions or concerns to call a hotline to talk to a health expert. The number is: 888-623-3120.