Search Results for keywords:"nitrogen oxides"

Found 4 results

Search Results: keywords:"nitrogen oxides"

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  • 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 (SOâ‚‚) 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.

  • 2025-04906 — Air Plan Approval; ID; Regional Haze Plan for the Second Implementation Period
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    Type:Proposed Rule
    Citation:90 FR 13516
    Reading Time:about 2 hours

    The Environmental Protection Agency (EPA) proposes to approve Idaho's updated regional haze State Implementation Plan (SIP) for the period from 2018 to 2028. Idaho's plan aims to make progress toward improving visibility caused by air pollution in national parks and wilderness areas. The plan includes specific strategies and rules for sources of air pollution, such as factories, to reduce emissions of harmful substances like nitrogen oxides and sulfur dioxide. The EPA found Idaho’s plan to be consistent with federal requirements and intends to incorporate the plan's measures into the state’s legally enforceable air quality rules.

    Simple Explanation

    The EPA wants to help Idaho clean up the air so we can see better in places like parks. They're looking at Idaho's plan to cut down on bad stuff from factories and think it meets the rules.

  • 2024-28873 — Air Plan Approval; SC; Updates to the Cross-State Air Pollution Rule
    Type:Proposed Rule
    Citation:89 FR 99180
    Reading Time:about 21 minutes

    The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision from South Carolina's Department of Health and Environmental Control. This revision updates the state's participation in the Cross-State Air Pollution Rule (CSAPR) emissions trading programs for nitrogen oxides (NOX) and sulfur dioxide (SO2). These programs are designed to help reduce air pollution that affects other states. The EPA believes the proposed changes align with federal requirements and do not impose new obligations beyond what state law already specifies.

    Simple Explanation

    The EPA wants to say yes to South Carolina's plan to update how they trade pollution credits for certain gases that can travel to other states. These updates help keep the air cleaner, and the plan follows all the rules without adding new ones.

  • 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.