High Carbon Monoxide Levels Led to Evacuation of North Haven Town Hall

North Haven town hall was evacuated for around an hour on Monday after high levels of carbon monoxide were detected.

First Selectman Michael Freda said town hall was evacuated around 11:30 a.m. after someone in the finance department, on the lower level of town hall, opened the door to the furnace room and became disoriented after a blast of air.

Town officials called the fire department, which evacuated the building, and found carbon monoxide levels of about 200 parts per million. The furnaces were immediately shut down.

The middle level of town hall tested in the 40 parts per million range, while upstairs tested in the 20s, which are both above normal.

As a comparison, the average level from a home without gas varies from .5 to 5 parts per million, while a home with a properly adjusted gas stove has 5 ppm to 15 ppm., while poorly adjusted stoves might have 30 ppm., according to the United States Environmental Protection Agency.

Two employees received oxygen, including the one who went to the furnace room first. Both are fine, officials said.

The car5bon monoxide levels within town hall have all returned to normal as well, according to the first selectmen.

The furnace company responded and is evaluating the boilers and ventilation system.

Everyone has returned to the building and town officials said it is warm enough to remain inside.

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