Is Ozone The Issue?

New ozone standards will push the majority of American metropolises from compliance with to violation of the federal Clean Air Act. In this column, Joel Schwartz argues that ozone isn't the big problem.

2 minute read

June 29, 2007, 7:00 AM PDT

By Nate Berg


"The Clean Air Act already pervades Americans' work and personal lives in ways both obvious and subtle. But the current system will seem a libertarian paradise compared to the brave new world we're about to enter. The EPA's new standard will greatly increase regulatory burdens in areas that already violate the ozone standard, and will expand the Byzantine Clean Air Act planning system into large areas of the country that have never been subject to them."

"Due to relatively low ozone levels during the last few years, only 19 percent of the nation's metropolitan areas violate EPA's current eight-hour ozone standard of 85 parts per billion, down from 40 percent just a few years ago. Non-metropolitan counties - those that include only rural areas or smaller cities - are in even better shape, with only a four-percent violation rate. Absent a tougher standard, this would have meant that many areas would shortly be getting out from under some of the Clean Air Act's most odious requirements."

"With the new standard, however, non-attainment will become the norm, rather than the exception. EPA is proposing a standard somewhere in the range of 70–75 ppb. Based on current ozone levels, this would put 67–87 percent of metropolitan areas in violation, and 39–72 percent of non-metropolitan counties."

"Ozone also can't be causing people to develop asthma. Asthma prevalence has nearly doubled during the last 25 years, but ozone and every other air pollutant sharply declined at the same time. Even direct attempts to link air pollution to asthma have come up empty. CARB and researchers from the University of Southern California tracked thousands of children from ages 10 to 18. Children who grew up in communities with the highest ozone levels in the country had a 30-percent lower risk of developing asthma when compared with children in areas with background ozone levels. The same study also showed that growing up in areas that exceed the current 85 ppb ozone standard 120 days per year has no effect on lung growth or capacity."

Wednesday, June 27, 2007 in National Review

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Red 1972 Ford Pinto with black racing stripes on display with man sitting in driver's seat.

Analysis: Cybertruck Fatality Rate Far Exceeds That of Ford Pinto

The Tesla Cybertruck was recalled seven times last year.

July 2, 2025 - Mother Jones

Close-up of park ranger in green jacket and khaki hat looking out at Bryce Canyon National Park red rock formations.

National Parks Layoffs Will Cause Communities to Lose Billions

Thousands of essential park workers were laid off this week, just before the busy spring break season.

February 18, 2025 - National Parks Traveler

Paved walking path next to canal in The Woodlands, Texas with office buildings in background.

Retro-silient?: America’s First “Eco-burb,” The Woodlands Turns 50

A master-planned community north of Houston offers lessons on green infrastructure and resilient design, but falls short of its founder’s lofty affordability and walkability goals.

February 19, 2025 - Greg Flisram

Screenshot of shade map of Buffalo, New York with legend.

Test News Post 1

This is a summary

0 seconds ago - 2TheAdvocate.com

Red 1972 Ford Pinto with black racing stripes on display with man sitting in driver's seat.

Analysis: Cybertruck Fatality Rate Far Exceeds That of Ford Pinto

The Tesla Cybertruck was recalled seven times last year.

18 minutes ago - Mother Jones

test alt text

Test News Headline 46

Test for the image on the front page.

March 5 - Cleantech blog