{"id":7948,"date":"2026-03-18T10:48:11","date_gmt":"2026-03-18T10:48:11","guid":{"rendered":"https:\/\/wmlearnver2.wpengine.com\/?p=7948"},"modified":"2026-03-26T16:35:44","modified_gmt":"2026-03-26T16:35:44","slug":"how-to-read-cannabis-coa","status":"publish","type":"post","link":"https:\/\/weedmaps.com\/learn\/products-and-how-to-consume\/how-to-read-cannabis-coa","title":{"rendered":"How to read a cannabis COA"},"content":{"rendered":"<div id=\"bsf_rt_marker\"><\/div>\n<p>If you've ever scanned a QR code on a cannabis package and landed on a wall of numbers, that's a COA \u2014 and it's one of the most important tools you have as a buyer. <\/p>\n\n\n\n<p><a href=\"https:\/\/weedmaps.com\/learn\/products-and-how-to-consume\/buy-thca-flower-online-potency-shipping\">A cannabis COA<\/a> (Certificate of Analysis) is a lab report that shows exactly what's in a <a href=\"https:\/\/weedmaps.com\/products?_gl=1*x6sxuz*_gcl_au*MTAyMzU2NzM3MS4xNzczNTc2MjAy\">cannabis product<\/a>. It documents potency, cannabinoid content, terpene profile, and the results of safety testing for contaminants like pesticides, heavy metals, and residual solvents.<\/p>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/01\/ChatGPT-Image-Mar-5-2026-at-09_22_44-AM-e1773827763880.png\" data-modal-open=\"lightbox_7808\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/01\/ChatGPT-Image-Mar-5-2026-at-09_22_44-AM-768x512.png\" srcset=\"\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"certificate of analysis\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><cite>Photo by: Gina Coleman\/Weedmaps<\/cite><\/figure>\t\t\t<div id=\"lightbox_7808\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2019\/01\/ChatGPT-Image-Mar-5-2026-at-09_22_44-AM-768x512.png\" srcset=\"\" sizes=\"100vw\" alt=\"certificate of analysis\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>What is a cannabis COA?<\/strong><\/h2>\n\n\n\n<p>Licensed, accredited labs generate COAs after testing a specific batch or lot. Dispensaries use them to confirm regulatory compliance. Consumers can use them to make informed decisions before buying \u2014 and to verify that what's on the label matches what's actually in the product.<\/p>\n\n\n\n<p>This guide walks through each section so you can quickly understand what the results actually mean and how to use them.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/wmaps.app.link\/BpaediS6B1b\">Shop lab-tested cannabis near you<\/a><\/div>\n<\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Where to find a COA<\/strong><\/h2>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/Screenshot-2026-03-18-at-4.17.53-AM-e1773829137977.png\" data-modal-open=\"lightbox_7949\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/Screenshot-2026-03-18-at-4.17.53-AM-768x571.png\" srcset=\"\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"Cannabis jar with COA label\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><\/figure>\t\t\t<div id=\"lightbox_7949\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/Screenshot-2026-03-18-at-4.17.53-AM-768x571.png\" srcset=\"\" sizes=\"100vw\" alt=\"Cannabis jar with COA label\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p>Most legal cannabis products include a QR code on the packaging that links directly to the COA. You can also find lab results:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>On brand or dispensary websites<\/li>\n\n\n\n<li>Through in-store menus<\/li>\n\n\n\n<li>By request at a licensed dispensary<\/li>\n<\/ul>\n\n\n\n<p>If a product doesn't have a COA or the link is broken, that's a red flag worth taking seriously.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to read a cannabis COA<\/strong><\/h2>\n\n\n\n<p>A COA can look intimidating at first glance, but the structure is consistent across most labs. Once you know what each section is telling you, it clicks quickly. Here's what to focus on.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What does the cannabinoid profile show?<\/strong><\/h2>\n\n\n\n<p>This section lists the concentration of cannabinoids detected in the product \u2014 and it's where most people get tripped up.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What is the difference between Total THC and delta-9 THC on a COA?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/dictionary\/tetrahydrocannabinol-thc\">Delta-9 THC<\/a>:<\/strong> The active, intoxicating form of THC already present in the product<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/what-is-thca-in-cannabis-flower\">THCA<\/a>:<\/strong> The non-intoxicating acidic precursor that converts to delta-9 THC when exposed to heat<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/thc-percentage-vs-cannabis-quality\">Total THC<\/a>:<\/strong> A calculated estimate of full psychoactive potential after decarboxylation, using the formula: (THCA \u00d7 0.877) + delta-9 THC<\/li>\n<\/ul>\n\n\n\n<p>That 0.877 multiplier accounts for the molecular weight lost when THCA sheds its carboxyl group during heating. It's a small but meaningful difference \u2014 and it's why Total THC is the number that actually matters when you're trying to gauge potency.<\/p>\n\n\n\n<p>Products marketed as <a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/how-thca-develops-in-cannabis-flower\">high-THCA flower <\/a>can still be extremely potent once combusted or vaporized. Total THC is the honest number.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What other cannabinoids appear on a COA?<\/strong><\/h3>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-86.png\" data-modal-open=\"lightbox_7944\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-86.png\" srcset=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-86.png 768w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-86-300x193.png 300w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"THCA molecule\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><\/figure>\t\t\t<div id=\"lightbox_7944\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-86.png\" srcset=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-86.png 768w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/image-86-300x193.png 300w\" sizes=\"100vw\" alt=\"THCA molecule\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/cannabis-and-your-body\/cbn-vs-cbd-effects\">CBD<\/a> (cannabidiol):<\/strong> Non-intoxicating; often associated with calming or balancing effects<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/dictionary\/cannabigerol-cbg\">CBG<\/a> (cannabigerol):<\/strong> The precursor cannabinoid from which most other cannabinoids \u2014 including THC and CBD \u2014 are biosynthesized during plant development<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/wmlearnver2.wpengine.com\/cannabis-and-your-body\/thc-vs-cbn-vs-cbd-sleep-gummies-explained\">C<\/a><a href=\"https:\/\/weedmaps.com\/learn\/cannabis-and-your-body\/cbn-vs-cbd-effects\">BN<\/a> (cannabinol):<\/strong> A degradation byproduct that forms as THC oxidizes over time; more common in aged or improperly stored cannabis<\/li>\n<\/ul>\n\n\n\n<p>Different cannabinoid ratios can meaningfully shape the overall experience beyond THC percentage alone.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What does the terpene profile mean on a COA?<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/terpenes-in-cannabis-concentrates-why-they-matter\">Terpenes are the aromatic compounds<\/a> responsible for the distinct flavors and smells across cannabis varieties. They shape how a product feels just as much as how it smells, even when THC numbers look identical.<\/p>\n\n\n\n<p>Common terpenes you'll see on a COA:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/myrcene\">Myrcene<\/a>:<\/strong> Earthy, musky, herbal<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/limonene\">Limonene<\/a>:<\/strong> Bright citrus<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/caryophyllene\">Caryophyllene<\/a>:<\/strong> Spicy, peppery \u2014 notable as the only terpene known to interact with cannabinoid receptors<\/li>\n\n\n\n<li><strong>Pinene:<\/strong> Sharp, piney, fresh<\/li>\n<\/ul>\n\n\n\n<p>This is why two products with nearly identical <a href=\"https:\/\/weedmaps.com\/learn\/the-plant\/thc-percentage-vs-cannabis-quality\">THC percentages<\/a> can feel and taste completely different. The terpene profile is often a better predictor of character than potency numbers alone.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What does contaminant testing show on a COA?<\/strong><\/h2>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1.jpg\" data-modal-open=\"lightbox_1049\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-768x510.jpg\" srcset=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1.jpg 2000w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-300x199.jpg 300w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-1024x680.jpg 1024w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-768x510.jpg 768w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-1536x1020.jpg 1536w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"Grow room\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><cite>Photo by: Gina Coleman\/Weedmaps<\/cite><\/figure>\t\t\t<div id=\"lightbox_1049\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-768x510.jpg\" srcset=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1.jpg 2000w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-300x199.jpg 300w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-1024x680.jpg 1024w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-768x510.jpg 768w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2020\/07\/evergreen-organics_BJH-99-1-1-1536x1020.jpg 1536w\" sizes=\"100vw\" alt=\"Grow room\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p>This is the most important section from a safety standpoint. A compliant product should show a clear <strong>Pass<\/strong> across every category. Here's what each test screens for:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Pesticides<\/strong><\/h3>\n\n\n\n<p>Chemical residues that may have been used during cultivation. Regulated markets set maximum residue limits (MRLs) for dozens of compounds.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Heavy metals<\/strong><\/h3>\n\n\n\n<p>Contaminants like lead, arsenic, cadmium, and mercury \u2014 cannabis is a bioaccumulator, meaning it readily absorbs heavy metals from soil.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Microbials<\/strong><\/h3>\n\n\n\n<p>Mold, yeast, and harmful bacteria including E. coli and Salmonella. Most markets also require <strong>water activity (Aw) testing<\/strong>, which measures moisture levels that can support microbial growth in stored products.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Residual solvents<\/strong><\/h3>\n\n\n\n<p>Relevant for concentrates and extracts \u2014 confirms that solvents used during extraction (butane, propane, ethanol, etc.) fall within safe limits.<\/p>\n\n\n\n<p>Any <strong>Fail<\/strong> in this section is disqualifying. Don't rationalize it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How is potency displayed by product type?<\/strong><\/h2>\n\n\n\n<p>COAs present potency differently depending on what's being tested:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/wmaps.app.link\/votH12l7B1b\">Flower<\/a>:<\/strong> Percentage (%) by dry weight<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/wmaps.app.link\/vexUjHq7B1b\">Concentrates<\/a>:<\/strong> Percentage (%) and sometimes milligrams per gram (mg\/g)<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/wmaps.app.link\/sFrydRv7B1b\">Edibles<\/a>:<\/strong> Milligrams (mg) per serving and per package total<\/li>\n<\/ul>\n\n\n\n<p>Understanding the format helps you compare products accurately and dose appropriately \u2014 especially when moving between product categories.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What batch and lab information should a COA include?<\/strong><\/h2>\n\n\n\t\t\t<figure class=\"wp-block-image \">\t\t\t<a href=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM.png\" data-modal-open=\"lightbox_7950\">\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM-768x512.png\" srcset=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM.png 1024w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM-300x200.png 300w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM-768x512.png 768w\" sizes=\"(min-width: 768px) 476px, (min-width: 1218px) 772px, 100vw\" alt=\"cannabis Certificate of Analysis\" title=\"Click to see a larger version of the image\">\n\t\t\t<\/a><\/figure>\t\t\t<div id=\"lightbox_7950\" data-modal data-modal-hide-heading data-modal-manual-close hidden>\n\t\t\t\t<h2>Image lightbox<\/h2>\n\t\t\t\t<img decoding=\"async\" src=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM-768x512.png\" srcset=\"https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM.png 1024w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM-300x200.png 300w, https:\/\/weedmaps.com\/learn\/wp-content\/uploads\/2026\/03\/ChatGPT-Image-Mar-18-2026-at-04_28_15-AM-768x512.png 768w\" sizes=\"100vw\" alt=\"cannabis Certificate of Analysis\">\n\t\t\t\t<button role=\"button\" class=\"a11y-modal__close-btn\" data-modal-close-btn>\n\t\t\t\t\t<svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M13.414 12l4.293 4.293a1 1 0 01-1.414 1.414L12 13.414l-4.293 4.293a1 1 0 11-1.414-1.414L10.586 12 6.293 7.707a1 1 0 011.414-1.414L12 10.586l4.293-4.293a1 1 0 011.414 1.414L13.414 12z\"\/><\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\n\n<p>Every legitimate COA should include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Batch or lot number:<\/strong> Must match the number printed on your packaging<\/li>\n\n\n\n<li><strong>Test date:<\/strong> Confirms how recent the analysis is \u2014 older results may not reflect current inventory<\/li>\n\n\n\n<li><strong>Lab name and accreditation:<\/strong> Confirms the facility is licensed and qualified to conduct regulatory testing<\/li>\n<\/ul>\n\n\n\n<p>COAs apply to specific batches, not entire product lines. If the batch number on the COA doesn't match the one on your package, that report doesn't cover what you're holding.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What are the red flags on a cannabis COA?<\/strong><\/h2>\n\n\n\n<p>Not all COAs are created equal. Watch for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Missing or broken QR codes<\/li>\n\n\n\n<li>No batch number, or a batch number that doesn't match the packaging<\/li>\n\n\n\n<li>Test dates that are significantly outdated<\/li>\n\n\n\n<li>Missing contaminant testing sections \u2014 pesticides, heavy metals, microbials, and solvents should all be present<\/li>\n\n\n\n<li>Results that look incomplete, rounded suspiciously, or inconsistent across sections<\/li>\n<\/ul>\n\n\n\n<p>If something doesn't add up, put it down and find a product that has its paperwork in order.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>The bottom line<\/strong><\/h2>\n\n\n\n<p>A cannabis COA shows what's in your product and whether it passed safety testing. Cannabinoids tell you potency. Terpenes tell you character. Contaminant results tell you whether it's safe. Batch details confirm the report actually covers what you're buying.<\/p>\n\n\n\n<p><em>If you're not checking the COA, you're guessing.<\/em> <em><a href=\"https:\/\/wmaps.app.link\/GVy2YIg7B1b\">Find dispensaries near you<\/a> on Weedmaps and look for products with verified COAs before you buy.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>If you've ever scanned a QR code on a cannabis package and landed on a wall of numbers, that's a COA \u2014 and it's one of the most important tools you have as a buyer. A cannabis COA (Certificate of Analysis) is a lab report...<\/p>\n","protected":false},"author":78,"featured_media":7808,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[183],"tags":[293,297,1441,2360,2389,2407,2412,2418,2419,2420,2421,2422,2423,2424,2425,2426],"class_list":["post-7948","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products-and-how-to-consume","tag-thca","tag-cannabis-terpenes","tag-cannabis-lab-testing","tag-terpene-profile","tag-total-thc","tag-certificate-of-analysis","tag-cannabis-coa","tag-how-to-read-coa","tag-cannabis-testing","tag-delta-9-thc","tag-residual-solvents-cannabis","tag-pesticide-testing-cannabis","tag-cannabis-safety-testing","tag-heavy-metals-cannabis","tag-weed-quality","tag-lab-tested-cannabis"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.9 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to read a cannabis COA | Weedmaps<\/title>\n<meta name=\"description\" content=\"Learn how to read a cannabis COA (Certificate of Analysis). 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