Search Results for keywords:"particulate matter"

Found 4 results

Search Results: keywords:"particulate matter"

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  • 2025-00115 — Air Plan Revisions; Arizona; Arizona Department of Environmental Quality
    Type:Proposed Rule
    Citation:90 FR 5790
    Reading Time:about 18 minutes

    The Environmental Protection Agency (EPA) is considering new rules to manage air pollution related to particulate matter from farming activities in Arizona, specifically in Pinal County. They are proposing to approve a state plan, but with some conditions, as certain parts are not enforceable enough. This decision means the EPA supports parts of the Arizona plan but is also suggesting that some rules need further improvement. Public comments on these proposals can be submitted until February 18, 2025.

    Simple Explanation

    The EPA wants to make sure farms in Arizona are keeping the air clean, but they think Arizona's plan to do this is mostly good with some parts that need fixing. They want people to tell them what they think of these ideas by February 18, 2025.

  • 2024-29463 — Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter
    Type:Rule
    Citation:89 FR 105692
    Reading Time:about 9 hours

    The Environmental Protection Agency (EPA) has revised the air quality standards for sulfur dioxide (SO₂) to better protect the environment. The previous standard had a three-hour measurement period, but now it is an annual average over three years, limited to 10 parts per billion (ppb). The EPA decided to keep the existing standards for nitrogen oxides and particulate matter the same. This update comes after reviewing scientific evidence and public feedback to ensure the standards protect public wellness without being too strict.

    Simple Explanation

    The EPA wants the air to be cleaner, so they changed the rules for how much smelly sulfur stuff can be in the air, saying it should be very tiny over a long time. They looked at science stuff to decide, but didn't change the rules for some other things like smoke and car fumes.

  • 2021-04057 — Air Plan Approval; KY; Updates to Attainment Status Designations
    Type:Rule
    Citation:86 FR 11870
    Reading Time:about 9 minutes

    The Environmental Protection Agency (EPA) has approved a change to the State Implementation Plan (SIP) submitted by Kentucky, which updates the status designations of areas within the state to align with federal standards for air quality. This update affects several National Ambient Air Quality Standards (NAAQS) and ensures that Kentucky's regulations are in line with the Clean Air Act. The changes impact designations for pollutants like ozone, particulate matter, and sulfur dioxide, confirming how these areas meet or do not meet federal air quality standards. The effective date of this rule is March 31, 2021.

    Simple Explanation

    Kentucky changed some rules to make sure their air stays clean, just like the big boss in the sky, the EPA, wants. It’s like making sure their color books match up with the big coloring book everyone else uses.

  • 2024-27627 — Air Plan Approval; California; Mojave Desert Air Quality Management District
    Type:Rule
    Citation:89 FR 96103
    Reading Time:about 14 minutes

    The Environmental Protection Agency (EPA) has approved revisions to the Mojave Desert Air Quality Management District's (MDAQMD) portion of the California State Implementation Plan (SIP). These revisions involve updating rules for managing air pollutants such as volatile organic compounds, nitrogen oxides, and particulate matter. The changes aim to ensure that the SIP reflects current rules that align with those enforced by the MDAQMD. The final rules will become effective on January 3, 2025, and include the incorporation of certain administrative and prohibitory standards into the SIP.

    Simple Explanation

    The EPA has updated some rules to help keep the air clean in a part of California, and these rules will start soon, in the beginning of January 2025. They want to make sure the rules they have match the rules that are already followed in that area.