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  2. Montana Department of Environmental Quality - Wikipedia

    en.wikipedia.org/wiki/Montana_Department_of...

    The Montana Department of Environmental Quality is a state-level government agency in Montana. The agency was founded by the Montana Legislature in 1995 as the Montana Board of Environmental Review. [1] It is responsible for monitoring air, water, energy, and mining standards, in addition to regulatory services. [2] [3] [4]

  3. Held v. Montana - Wikipedia

    en.wikipedia.org/wiki/Held_v._Montana

    Bill 971 exempted the DEQ from "adhering to air quality and emissions standards when authorizing or changing permits". [23] A Senate Bill 557 amendment sponsored by Sen. Mark Noland, R-Bigfork, which is very similar to HB 971, and was also a response to the Moses decision on the Laurel plant, was introduced on April 14. [23]

  4. National Ambient Air Quality Standards - Wikipedia

    en.wikipedia.org/wiki/National_Ambient_Air...

    The Clean Air Act requires the EPA to set US National Ambient Air Quality Standards (NAAQS) for the six CAPs. [6] The NAAQS are health based and the EPA sets two types of standards: primary and secondary. The primary standards are designed to protect the health of 'sensitive' populations such as asthmatics, children, and the elderly.

  5. Smoke from Canada wildfires prompts air quality alerts in ...

    www.aol.com/news/smoke-canada-wildfires-prompts...

    An air quality alert was also in effect Saturday in Montana, with the greatest smoke concentrations in central and eastern parts of the state, according to the Department of Environmental Quality.

  6. Unhealthy air quality invades northwest Montana - AOL

    www.aol.com/news/unhealthy-air-quality-invades...

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  7. Air quality law - Wikipedia

    en.wikipedia.org/wiki/Air_quality_law

    A distinction may be made between mandatory and aspirational air quality standards. For example, U.S. state governments must work toward achieving NAAQS, but are not forced to meet them. On the other hand, employers may be required immediately to rectify any violation of OSHA workplace air quality standards.

  8. State Implementation Plan - Wikipedia

    en.wikipedia.org/wiki/State_Implementation_Plan

    A State Implementation Plan (SIP) is a United States state plan for complying with the federal Clean Air Act, administered by the Environmental Protection Agency (EPA). The SIP, developed by a state agency and approved by EPA, consists of narrative, rules, technical documentation, and agreements that an individual state will use to control and clean up polluted areas.

  9. Non-attainment area - Wikipedia

    en.wikipedia.org/wiki/Non-attainment_area

    The criteria pollutants and their respective limits are defined in the National Ambient Air Quality Standards, which were a part of the Clean Air Act Amendments of 1970 (P.L. 91-604, Sec. 109). The EPA has regulated each criteria pollutant through two different standards, primary and secondary. [2]