Airborne arsenic dust from Allied Chemical was killing Baltimore City residents near its Race Street pesticide plant, according to research published in 1974 that never reached city leaders.

While a city panel was studying arsenic in the soil of Swann Park, Dr. Genevieve Matanoski of the Johns Hopkins School of Public Health found that the airborne arsenic was killing seven times as many men living near the plant from lung cancer as in the rest of Baltimore. Her research was part of a workshop by the American Public Health Association and was published by the journal Environmental Research.

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