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Reconsidering the National Ambient Air Quality Standards for Particulate Matter

Updated: Mar 27, 2023

In this blog post, we'll discuss the recent announcement from the Environmental Protection Agency (EPA) regarding the reconsideration of the National Ambient Air Quality Standards (NAAQS) for particulate matter (PM). This decision has important implications for businesses across the country, and we're here to help you understand what it means for you.


On January 27, 2023, the EPA published a proposed rule in the Federal Register announcing the reconsideration of the NAAQS for particulate matter. The reconsideration process is a response to concerns raised by public health and environmental groups, as well as new scientific evidence that has emerged since the last review of the standards in 2020. The goal of this reconsideration is to ensure that the NAAQS adequately protects public health and the environment from the harmful effects of PM pollution. Specifically, this proposed rule suggests lowering the primary PM2.5 (PM with a diameter of 2.5 micrometers or smaller) standard from 12 µg/m3 to 10, 9, or even 8 µg/m3.

Particulate Matter Pollution

Particulate matter, or PM, is a complex mixture of solid and liquid particles suspended in the air. These particles can have both short-term and long-term adverse effects on human health and the environment. PM pollution is linked to a variety of health issues, including asthma, heart disease, and premature death. The NAAQS for PM, established under the Clean Air Act, set limits on the concentration of PM in the air to protect public health and welfare.

What This Means for Businesses

The reconsideration of the NAAQS for PM is an important step towards ensuring that the standards are up-to-date and effective in protecting public health and the environment. For businesses, this may mean stricter regulation and potential changes in air quality management practices. Businesses that emit PM, such as those in the mining, manufacturing, construction, and transportation sectors, may be subject to new requirements as a result of the updated standards.

How Tipple Consulting Can Help

At Tipple Consulting, we understand that the changing regulatory landscape can be challenging for businesses to navigate. Our team of experts is here to help you understand the implications of the reconsideration of the NAAQS for PM and guide you through the process of adapting to potential new regulations.

Our services include:

  1. Air quality assessments: We can help you assess your current emissions and determine if you are in compliance with existing and potential future air quality standards.

  2. Emission reduction strategies: Our team can work with you to develop strategies to reduce PM emissions, helping you comply with regulations while also promoting sustainability.

  3. Permitting assistance: If your business requires permits for air emissions, we can help you navigate the permitting process and ensure that you meet all regulatory requirements.

  4. Compliance support: Our team can provide ongoing support to help you maintain compliance with air quality regulations, including monitoring, reporting, and recordkeeping.


The EPA's reconsideration of the National Ambient Air Quality Standards for particulate matter is an important development that may have significant implications for businesses across the country. As an air quality consulting firm, we are committed to helping our clients navigate these changes and maintain compliance with air quality regulations. Contact us today to learn more about how we can support your business during this critical time.


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