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  2. List of Ohio area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Ohio_area_codes

    In 2016, area code 614 was overlaid with 380 in the Columbus/Central Ohio area for the same reason. In 2020, 326 was added as an all services overlay for 937. Area code 283 was added as an overlay for 513 on April 28, 2023. [2] [3] Area code 436 went into service on March 1, 2024, as an overlay of 440. [4]

  3. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.

  4. Indoor air quality - Wikipedia

    en.wikipedia.org/wiki/Indoor_air_quality

    The World Health Organization (WHO) sets the ideal indoor radon levels at 100 Bq/m-3. [97] In the United States, it is recommend to fix homes with radon levels at or above 4 pCi/L. At the same time it is also recommends that people think about fixing their homes for radon levels between 2 pCi/L and 4 pCi/L. [ 98 ] In the United Kingdom the ...

  5. High levels of deadly radon gas found in one-quarter of Erie ...

    www.aol.com/high-levels-deadly-radon-gas...

    More than 26% of Erie County homes tested for radon between 2010 and 2020 have detected high levels of the odorless, colorless, tasteless, and deadly gas.

  6. Category:Area codes in Ohio - Wikipedia

    en.wikipedia.org/wiki/Category:Area_codes_in_Ohio

    List of Ohio area codes; 0–9. Area code 216; Area codes 330 and 234; Area codes 419 and 567; Area codes 440 and 436; Area codes 513 and 283; Area codes 614 and 380;

  7. Homeowners should test for deadly, invisible radon gas - AOL

    www.aol.com/homeowners-test-deadly-invisible...

    24/7 Help. For premium support please call: 800-290-4726

  8. Radon mitigation - Wikipedia

    en.wikipedia.org/wiki/Radon_mitigation

    A typical radon test kit Fluctuation of ambient air radon concentration over one week, measured in a laboratory. The first step in mitigation is testing. No level of radiation is considered completely safe, but as it cannot be eliminated, governments around the world have set various action levels to provide guidance on when radon concentrations should be reduced.

  9. Radon levels in Old Courthouse trigger a plan, but details ...

    www.aol.com/radon-levels-old-courthouse-trigger...

    Four (4.0) picocuries per liter is the "action level" above which remedial action should be taken, said Ryan Goelzhauser, a certified radon mitigation specialist with Popham Construction.

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