DALLAS - The city said it is issuing a Notice of Violation against Medical City Dallas for releasing a bright green dye into White Rock Creek on Wednesday.
Dallas Fire-Rescue's Hazmat team told News 8 the bright green dye, which was non-toxic and biodegradable, was flowing out of a cooling tower at the hospital after contractors tested pipes.
Medical City Dallas said the discharge is the result of a simple mistake.
The substance was seen emptying into White Rock Creek in North Dallas on Wednesday.
"The pipe was tied into the wrong line," said Chris Hawes, Medical City Dallas spokeswoman. "It should have flowed into the sanitary sewer system, but instead flowed into the storm water system."
The pipe has been attached to the wrong drain since the hospital's air conditioning unit was installed in June 2010.
"The City of Dallas has analyzed initial water samples, and assures us the water flowing from the pipe was safe," Hawes added.
The hospital hopes to correct the drainage problem within a week, she continued.
The Notice of Violation gives the hospital 30 days to make repairs, said Jose Torres, City of Dallas spokesman.