For Release 02-27-02

Wind and Dust Cause Unhealthy Air in Northern Mason City

DES MOINES – Air quality in northern areas of Mason City was unhealthy yesterday due to dust particles kicked up by high, sustained winds, according to the DNR.

Based on the national Air Quality Index, or AQI, air quality reached 107, a level considered unhealthy for sensitive groups such as persons with respiratory disease. Typically, extended and prolonged outdoor exertion is also needed to increase respiratory risks.

“Sustained high winds likely kicked up dusts on the property of two cement manufacturers yesterday that contributed to some of the air concerns,” said Brian Button, DNR air quality information specialist. He said because the weather was cold and windy, fewer people were likely out-of-doors for extended periods of time, thus limiting exposure.

Button said efforts by both cement plants have helped reduce local dust concerns. “There were no unhealthy days detected last year,” he said.

The AQI is a national method of reporting air quality. The higher the AQI, the poorer the air quality. An AQI of 1 to 50 is considered good, and AQI from 51 to 100 is moderate, 101 is unhealthy for sensitive people and 151 and higher is unhealthy for everyone. Most days in Iowa fall into the good to moderate category with unhealthy days most likely during warm weather months when ozone smog and particulate matter levels are higher.

Iowans can check air pollution levels and learn more about air quality at iowacleanair.org.