National Jewish Health is open again after a bad mix of swimming pool chemicals released toxic fumes Monday morning.
Firefighters evacuated 500 people, and the chemicals sickened about 45 people who were taken to other hospitals.
None of the ailments proved serious, the hospital said in a statement.
The Denver Fire Department allowed all buildings to reopen at 11:30 a.m.
Exposure to the vapors was brief and minimal, said Lt. Phil Champagne, a Denver Fire Department spokesman.
The Kunsberg School, a campus at National Jewish for children with asthma and other chronic diseases, was closed after the 8 a.m. mishap and will reopen today.
The incident started on the main floor of the school, when maintenance workers inadvertently mixed two water-cleaning chemicals — hydrochloric acid and sodium hypochlorite, according to the hospital.
The incident brought a flurry of firefighters in haz-ardous-material suits and ambulances to ferry away the sick.
A woman running from the school holding a little boy’s hand said her daughter had been taken to a hospital.
There were about 90 elementary school students and staff at Kunsberg on Monday morning. Students who were not ill were taken to a nearby fire station, where parents picked them up, said National Jewish spokesman Adam Dormuth.
The fumes spread to at least two other buildings that were connected by tunnels to the school.
Staff writer Joey Bunch contributed to this report.
Kieran Nicholson: 303-954-1822 or knicholson@denverpost.com
