Learn the Issues

This page shows all of the pages at www.epa.gov that are tagged with Learn the Issues.

  • Perspectives

    Read articles by EPA leadership and staff about protecting human health and the environment.

  • Health Effects Attributed to Wildfire Smoke

    health effects from wood smoke in forest fires

  • Radioactive Material in Science Classrooms

    Chemistry, physics, and earth science labs are some of the places where radioactive materials could be used in schools. Talk to your science teacher to find out how you can learn more about experiments using radiation in your school.

  • Local and State Mutual Aid for the Water Sector: Knowing Your Options When Disaster Strikes

    This webinar will provide WARN information, an EMAC overview targeted for the Water Sector, and insights and lessons learned from state agencies and utilities on strategies to streamline assistance.

    • Date: October 29, 2025

  • Cybersecurity Response

    Cybersecurity Response. Learn about responding to a cyber incident and gain knowledge on current active threats.

  • When individuals apply for certification in the Federal program under the provisions of 745.226(a)(1)(ii) by submitting a valid certification from an authorized State or Tribe, how long will the certification last?

    The full certification period for individuals applying under the provisions of 745.226(a)(1)(ii) will be three years from the date of issuance of certification by EPA. Question Number: 23002-33445 Find a printable PDF copy of all frequent questions pertaining to lead .

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  • When must I apply for certification?

    You must complete the application process, including the third party exam (if required for your discipline), before the expiration date of your interim certification. Submit your application for certification to EPA within 30 days of completing your initial training course so that you have plenty of time to take the…

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  • How do I contact EPA about lead concerns in my area?

    Answer: You may call the National Lead Information Center at 1-800-424-LEAD(5323) or visit our Contact Us about Lead page . You can also report violations online . Question Number: 23002-33312 Find a printable PDF copy of all frequent questions pertaining to lead .

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  • EPA's Draft Criteria for Radon Credentialing Organizations

    This page will provide the public with information on a Federal Register Notice of Intent to Establish Voluntary Criteria for Radon Credentialing Organizations.Topics covered include background and information on how to review and provide comments.

  • Radon-Resistant New Construction for Home Buyers

    Learn about the facts of radon and radon-resistance new construction for your home

  • Where I work we manufacture products from granite and other natural materials. Should I be concerned about radiation in my workplace?

    I work in a granite fabricating and finishing shop. Is there a radon risk in my workplace? Based on existing studies, most types of granite used in countertops and other aspects of home construction are not typically known to be major contributors of radiation and radon in the average home…

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  • Depleted Uranium

    Uranium-235 provides the fuel used to produce both nuclear power and the powerful explosions used in nuclear weapons. Depleted uranium (DU) is the material left after most of the U-235 is removed from the natural uranium ore.

  • How to Protect Your Family from Radon When Buying a Newly Built Home

    When buying a recently built home, EPA recommends you check for radon resistant features and follow certain techniques if you purchase a home in a high radon area.

  • How often should I test/retest my home for radon?

    Our general guidance from A Citizen's Guide to Radon - (December 2016, EPA 402/K12/002) - suggests: If your living patterns change and you begin occupying a lower level of your home (such as a basement) you should retest your home on that level. Even if your test result is below…

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  • Are we sure that radon is a health risk?

    The EPA already has a wealth of scientific data on the relationship between radon exposure and the development of lung cancer. The scientific experts agree that the occupational miner data is a very solid base from which to estimate risk of lung cancer deaths annually. While residential radon epidemiology studies…

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  • How much can a radon mitigation system cost?

    You have tested your home for radon, but now what? If you have tested your home for radon and confirmed that you have elevated radon levels, 4 picocuries per liter (150 becquerels per cubic meter (Bq/m 3 ))in air (pCi/L) or higher, our guidance can help you: Select a qualified…

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  • Report a Violation

    Learn about reporting environmental violations and instances of fraud, waste and abuse.

  • Radon Resources for Real Estate Community

    For home buyers and sellers, check out the resources listed on this page and learn how to fix your home and learn about radon-resistant construction.

  • What is Radon?

    Radon is a radioactive gas that forms naturally when uranium, thorium, or radium, which are radioactive metals break down in rocks, soil and groundwater. People can be exposed to radon primarily from breathing radon in air that comes through cracks and gaps in buildings and homes. Because radon comes naturally…

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  • Protecting Source Water in West Virginia

    EPA funds helped WV residents and utilities in source water protection efforts and emergency planning following the Elk River chemical spill of 2014. The spill contaminated the water supply of nearly 300,000 people in the capitol and surrounding counties.

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