{"id":27111,"date":"2026-02-20T09:22:47","date_gmt":"2026-02-20T16:22:47","guid":{"rendered":"https:\/\/scotthomeinspection.com\/?p=27111"},"modified":"2026-03-03T09:23:48","modified_gmt":"2026-03-03T16:23:48","slug":"guide-to-radon-testing","status":"publish","type":"post","link":"https:\/\/scotthomeinspection.com\/guide-to-radon-testing\/","title":{"rendered":"A Guide to Radon and Radon Testing in Colorado"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1144px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p><span style=\"font-weight: 400;\">You can\u2019t see it, smell it, or taste it. These are the qualities that make radon tricky and are what make radon testing so important.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Radon is a naturally occurring radioactive gas that comes from the slow breakdown of uranium in soil and rock. It can build up inside homes without anyone realizing it\u2019s there, quietly becoming a potential health concern over time.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If you\u2019re buying a home in Colorado, radon is one of those things you\u2019ll hear about early and often. That\u2019s not because inspectors or agents are trying to scare you. It\u2019s because radon is common here. Understanding what radon is and how radon testing works can give buyers peace of mind during the real estate transaction.\u00a0<\/span><\/p>\n<h2><b>Why Radon Matters for Colorado Homebuyers<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Radon exposure is the <\/span><a href=\"https:\/\/www.epa.gov\/radon\/health-risk-radon\"><span style=\"font-weight: 400;\">second leading cause of lung cancer<\/span><\/a><span style=\"font-weight: 400;\"> in the United States, behind smoking. The risk increases with higher radon levels and longer exposure, which is why radon inside a home deserves attention. Since most people spend a significant amount of time indoors, what\u2019s in the air matters.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For homebuyers, radon isn\u2019t a deal-breaker. It\u2019s a data point. Radon is measurable, well-studied, and very manageable when needed. Knowing the radon level in a home allows buyers to move forward with clarity instead of guesswork.<\/span><\/p>\n<h2><b>Radon in Colorado: Understanding the Radon Zones<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The <\/span><a href=\"https:\/\/www.epa.gov\/sites\/default\/files\/2014-08\/documents\/colorado.pdf\"><span style=\"font-weight: 400;\">Environmental Protection Agency<\/span><\/a><span style=\"font-weight: 400;\"> (EPA) groups counties into three radon zones based on the likelihood of elevated indoor radon levels. These zones help homeowners and buyers understand overall risk:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Zone 1<\/b><span style=\"font-weight: 400;\"> counties have the highest predicted average radon levels (4.0 pCi\/L or higher).\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Zone 2<\/b><span style=\"font-weight: 400;\"> counties have moderate predicted levels<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Zone 3<\/b><span style=\"font-weight: 400;\"> counties have lower predicted levels.\u00a0<\/span><\/li>\n<\/ul>\n<div id=\"attachment_27035\" style=\"width: 1034px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM.png\"><img decoding=\"async\" aria-describedby=\"caption-attachment-27035\" class=\"size-large wp-image-27035\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-1024x768.png\" alt=\"Radon testing is important across Colorado, as most areas fall into EPA Zone 1, indicating high radon potential, with some patches in Zone 2.\" width=\"1024\" height=\"768\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-200x150.png 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-300x225.png 300w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-400x300.png 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-600x450.png 600w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-768x576.png 768w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-800x600.png 800w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-1024x768.png 1024w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM-1200x900.png 1200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/Screenshot-2026-01-07-at-2.44.52-PM.png 1374w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><p id=\"caption-attachment-27035\" class=\"wp-caption-text\">Most of Colorado, especially the Front Range, falls into Zone 1, meaning a high potential for elevated radon levels.<\/p><\/div>\n<p><span style=\"font-weight: 400;\">That doesn\u2019t mean every home has high radon, but it does mean testing is especially important here. Two neighboring homes can have very different radon levels, which is why statewide maps offer helpful context.<\/span><\/p>\n<h2><b>How Does Radon Get Into a Home?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Radon starts in the soil beneath a house and moves upward. As air pressure inside a home changes, radon gas can be pulled in through small openings like foundation cracks, sump pits, crawlspaces, or utility penetrations. This is normal house behavior, not a construction flaw.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Because radon comes from the ground, any home can be affected regardless of age, size, or how well it\u2019s built. That\u2019s why radon testing is recommended even for newer homes or properties that have tested low in the past.<\/span><\/p>\n<h2><b>What Is Radon Testing?<\/b><\/h2>\n<p><a href=\"https:\/\/scotthomeinspection.com\/radon-test\/?utm_source=website&amp;utm_medium=blog&amp;utm_campaign=february_2026\"><span style=\"font-weight: 400;\">Radon testing<\/span><\/a><span style=\"font-weight: 400;\"> measures the concentration of radon gas in the air, usually reported in picocuries per liter (pCi\/L). The EPA recommends action if radon levels are 4.0 pCi\/L or higher. Think of this number as a decision point, not a pass-or-fail exam.<\/span><\/p>\n<div id=\"attachment_27034\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/10035161_reports_13d320dc-11c6-4406-b226-02719ea939b8_photos_5e81b151-4bbd-46a0-a94f-863b75d18c4b_133d123d-c31b-52ad-ae36-ee3921e987ef_original_small.jpg\"><img decoding=\"async\" aria-describedby=\"caption-attachment-27034\" class=\"size-full wp-image-27034\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/10035161_reports_13d320dc-11c6-4406-b226-02719ea939b8_photos_5e81b151-4bbd-46a0-a94f-863b75d18c4b_133d123d-c31b-52ad-ae36-ee3921e987ef_original_small.jpg\" alt=\"Radon test device set up in a Denver basement to measure radon levels during a home inspection.\" width=\"600\" height=\"450\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/10035161_reports_13d320dc-11c6-4406-b226-02719ea939b8_photos_5e81b151-4bbd-46a0-a94f-863b75d18c4b_133d123d-c31b-52ad-ae36-ee3921e987ef_original_small-200x150.jpg 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/10035161_reports_13d320dc-11c6-4406-b226-02719ea939b8_photos_5e81b151-4bbd-46a0-a94f-863b75d18c4b_133d123d-c31b-52ad-ae36-ee3921e987ef_original_small-300x225.jpg 300w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/10035161_reports_13d320dc-11c6-4406-b226-02719ea939b8_photos_5e81b151-4bbd-46a0-a94f-863b75d18c4b_133d123d-c31b-52ad-ae36-ee3921e987ef_original_small-400x300.jpg 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/10035161_reports_13d320dc-11c6-4406-b226-02719ea939b8_photos_5e81b151-4bbd-46a0-a94f-863b75d18c4b_133d123d-c31b-52ad-ae36-ee3921e987ef_original_small.jpg 600w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><p id=\"caption-attachment-27034\" class=\"wp-caption-text\">A short-term radon test measures the concentration of radon gas in the air, typically over 48 hours, providing clear data during the home inspection process.<\/p><\/div>\n<p><span style=\"font-weight: 400;\">There are two main types of radon testing: <\/span><a href=\"https:\/\/scotthomeinspection.com\/what-is-radon-testing\/?utm_source=website&amp;utm_medium=blog&amp;utm_campaign=february_2026\"><span style=\"font-weight: 400;\">short-term and long-term<\/span><\/a><span style=\"font-weight: 400;\">. Both are useful, depending on the situation, and both help answer the same basic question: how much radon is present in the home.<\/span><\/p>\n<h2><b>Short-Term vs. Long-Term Radon Testing<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Short-term radon tests typically run from 48 hours to 7 days. They provide a quick snapshot of radon levels under normal living conditions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Long-term radon tests measure radon over 90 days or more. These tests provide a more comprehensive average and are often used by homeowners who want a deeper understanding of radon levels throughout different seasons. Both testing methods work together to create a clearer picture.<\/span><\/p>\n<h2><b>What Happens If Radon Levels Are High?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">This is where buyers often pause and where a little context helps. Elevated radon levels are very common in Colorado, and they are also fixable. Radon mitigation systems are designed to reduce radon levels by venting the gas safely out of the home.<\/span><\/p>\n<div id=\"attachment_27030\" style=\"width: 778px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-scaled.jpg\"><img decoding=\"async\" aria-describedby=\"caption-attachment-27030\" class=\"size-large wp-image-27030\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-768x1024.jpg\" alt=\"Radon mitigation system on the exterior of a Denver home with white PVC vent pipe extending above the roofline.\" width=\"768\" height=\"1024\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-200x267.jpg 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-225x300.jpg 225w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-400x533.jpg 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-600x800.jpg 600w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-768x1024.jpg 768w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-800x1067.jpg 800w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-scaled.jpg 1080w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-1152x1536.jpg 1152w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2026\/01\/1000268193-1200x1600.jpg 1200w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a><p id=\"caption-attachment-27030\" class=\"wp-caption-text\">A radon mitigation system typically consists of a fan, venting pipes, a monitoring device, and sealing materials to safely remove radon from a home.<\/p><\/div>\n<p><span style=\"font-weight: 400;\">Modern radon mitigation systems are highly effective and typically remove up to 99% of radon from a home. Once installed, they are considered a permanent solution and require little maintenance.\u00a0<\/span><\/p>\n<h2><b>Common Buyer Questions About Radon<\/b><\/h2>\n<p><b>Is radon a reason to walk away from a home?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">Not usually. Radon is one of the most manageable inspection findings. It can be resolved through negotiation and mitigation.<\/span><\/p>\n<p><b>Can a home test be low now but high later?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">Yes. Radon levels can change over time due to weather, home renovations, or changes in ventilation. That\u2019s why home inspectors recommended testing even if a home tested low in the past.<\/span><\/p>\n<p><b>Do new homes have radon?<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">They can. New construction does not guarantee low radon levels, which is why radon testing is still important.<\/span><\/p>\n<h2><b>Why Radon Testing Is So Common in Real Estate<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">In Colorado, radon testing has become a standard part of the home inspection process. Buyers expect it, agents are familiar with it, and sellers understand that it\u2019s part of responsible homeownership in this region.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When buyers understand what radon is, the process feels far less intimidating. Radon testing provides clear information, supports informed decisions, and helps everyone move forward with confidence.<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Radon is invisible, odorless, and common in Colorado homes \u2014 especially along the Front Range. Learn what radon is, how it enters a home, and how radon testing works during a real estate transaction so you can move forward with clarity and confidence.<\/p>\n","protected":false},"author":10,"featured_media":23161,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[853],"tags":[5441,5444,5443,5448,5447,5254,5122],"class_list":["post-27111","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-radon-info","tag-colorado-radon","tag-denver-real-estate","tag-front-range","tag-homebuying","tag-indoor-air-quality","tag-radon","tag-radon-testing"],"nelio_content":{"autoShareEndMode":"never","automationSources":{"useCustomSentences":false,"customSentences":[]},"efiAlt":"","efiUrl":"","followers":[19,10],"highlights":[],"isAutoShareEnabled":true,"networkImageIds":[],"permalinkQueryArgs":[],"series":[],"suggestedReferences":[]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.1 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>A Guide to Radon and Radon Testing in Colorado - Scott Home Inspection<\/title>\n<meta name=\"description\" content=\"Learn what radon is, why it\u2019s common in Colorado homes, and how radon testing works during real estate transactions in Colorado.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scotthomeinspection.com\/guide-to-radon-testing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A Guide to Radon and Radon Testing in Colorado\" \/>\n<meta property=\"og:description\" content=\"Learn what radon is, why it\u2019s common in Colorado homes, and how radon testing works during real estate transactions in Colorado.\" \/>\n<meta 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