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TOAR shows present-day global ozone distribution and trends relevant to health; public database

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Ozone levels across much of North America and Europe dropped significantly between 2000 and 2014. People living in parts of southern Europe, South Korea and southern Japan and China also experienced more than 15 days a year of ozone levels above 70 ppb. Source: University of Leicester. Click to enlarge.

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EPA proposes approval of new ozone plans for the two of the worst Air Quality Zones in US: California’s San Joaquin Valley and South Coast

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US EPA Region 9 8-hour ozone trends, 1979-2000. These State Implementation Plans (SIPs) are the roadmaps to meeting the 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS) of 0.08 In 1997, EPA first established the 8-hour ozone standard, which replaced the older 1-hour ozone standard (0.12 Source: EPA.

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Reducing Black Carbon Emissions and Ground-Level Ozone Would Provide Immediate Benefit Against Climate Change

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Reducing emissions of black carbon soot and ground-level ozone would quickly make a considerable dent in the climate change problem and would also contribute to public health and protect crop yields, according to an essay in the September/October issue of Foreign Affairs. Besides a danger to breathe, ozone lowers crop yields.

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EPA proposes retaining current NAAQS for particulate matter

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concentrations in the US fell by 39% between 2000 and 2018 while average PM 10 concentrations fell by 31% during the same period. EPA is proposing that the current secondary standards are adequate to protect against PM-related visibility impairment, climate effects, and effects on materials. Average PM 2.5

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EEA report finds most Europeans in cities still exposed to levels of air pollution exceeding WHO guidelines

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20 % of stations registered concentrations above the EU ozone (O 3 ) target value for the protection of human health. The percentage of the EU-28 urban population exposed to O 3 levels exceeding the WHO AQG value was 96% in 2017—showing scarcely any fluctuation since 2000.

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US EPA Reports National Trends Show Improvements in Air Quality

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Since 1990, nationwide air quality has improved significantly for the six common air pollutants: ground-level ozone; particle pollution; lead; nitrogen dioxide; carbon monoxide; and sulfur dioxide, according to the US Environmental Protection Agency (EPA) report “Our Nation’s Air - Status and Trends through 2008”. since 2000), by 19%.

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EPA to begin work on proposed rulemaking for on-road heavy-duty ultra-low NOx standard for MY 2024

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This timeframe is consistent with the lead-time requirements of the Clean Air Act, and is aligned with a milestone implementation year for the EPA heavy-duty Phase 2 GHG program. (In In the final HD Phase 2 rule, EPA had noted the evidence supporting the need for more stringent national NO x emissions standards.).

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