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EPA proposes tightening primary ozone standards to range of 65-70 ppb; final rule by October 2015

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Counties where measured ozone is above proposed range of standards, based on 2011-2013 monitoring data. Earlier this year, EPA staff had recommended the further reduction of this primary ozone standard from the current 75 ppb (parts per billion) to a revised level within the range of 70 ppb to 60 ppb—and preferably below 70 ppb.

Ozone 273
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EPA tightens ground-level ozone standard to 70 ppb

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issued its final rule revising the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb) from 75 ppb to protect public health. Ground-level ozone forms when nitrogen oxides (NO x ) and volatile organic compounds (VOCs) react in the air. The US Environmental Protection Agency (EPA).

Ozone 150
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Obama Administration withdraws proposed rulemaking on strengthened ozone standards

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In a statement released this morning, President Barack Obama said he has requested that US Environmental Protection Agency (EPA) Administrator Lisa Jackson withdraw the agency’s draft Ozone National Ambient Air Quality Standards (NAAQS) rulemaking. National Ambient Air Quality Standards (NAAQS). Earlier post.)

Ozone 259
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EPA Proposes New Tougher Ground-Level Ozone Standards

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Counties projected to violate proposed Primary 8-hour Ground-Level Ozone Standards in 2020. The United States Environmental Protection Agency has proposed the strictest standards to date for ground-level ozone. EPA is proposing an accelerated schedule for designating areas for the primary ozone standard.

Ozone 186
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MECA emissions inventory & air quality modeling shows potential benefits of national cleaner trucks initiative at CARB limits

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On 6 March 2020, the California Air Resources Board (CARB) proposed to set an intermediate FTP NO x emissions limit of 50 mg/bhp-hr in model years 2024-2026 with a final FTP standard of 20 mg/bhp-hr in 2027, representing a 90% reduction below today’s standard of 200 mg/bhp-hr. Source: MECA. ppb in the west (San Bernardino, CA) and 4.9

Cleaner 243
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US NOx Cap and Trade Program Lowers Smog Levels in Eastern United States

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The existing US NO x cap-and-trade program lowered 2008 summertime NO x emissions from power plants and large industrial sources 62% compared to year 2000 levels and 75% lower than in 1990, according to a report released by the US Environmental Protection Agency (EPA). State level ozone emissions in the NBP, from 1990 to 2010 (projected).

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EPA Proposes Transport Rule to Cut Pollution from Power Plants in 31 States and DC; New Approach for Pollution Reduction

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The proposed Transport Rule sets in place a new approach that can and will be applied again as further pollution reductions are needed to help areas meet air quality health standards, EPA says. This proposal reduces emissions contributing to fine particle (PM 2.5 ) and ozone nonattainment that often travel across state lines.

Pollution 218