Los Angeles Avoids Stage 1 Ozone Alerts for Second Year

Aquality management programs in Los Angeles have prevented for second year in a row issuing of any Stage 1 ozone alerts.

Published: 31-Oct-2000

LOS ANGELES, California, October 30, 2000 (ENS) - For the second year in a row, the greater Los Angeles metropolitan area has not had a single Stage 1 ozone episode when air quality is very unhealthy. With rainy conditions predicted, southern California's 2000 smog season has drawn to a close, said the South Coast Air Quality Management District (AQMD). "AQMD's Air Quality Management Plan predicted an end to Stage 1 episodes by the year 2000, and our air pollution control programs have allowed the region to meet that milestone," said Barry Wallerstein, AQMD's executive officer. As of October 26, there had been 40 days of unhealthy air quality when the federal standard for ozone, 0.12 parts per million averaged over one hour, was exceeded. There were 41 unhealthy air days in 1999 and 62 in 1999, reflecting a long term trend of improved air quality.

Since 1985 there has been a 75 percent reduction in the number of days of unhealthy air quality, or an average of better than seven fewer unhealthy air days each year. This year, several areas, including coastal and south central Los Angeles County, north coastal Orange County, the west San Fernando Valley, Lake Elsinore and the Coachella Valley did not have a single exceedance of the federal ozone standard. Southland residents have not experienced a Stage 1 episode since 1998. Stage 1 episodes, declared when ozone averages 0.20 parts per million for an hour, reached their peak in 1977 with 121 days - one in three during that year - attaining the very unhealthy level.

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