{"id":21965,"date":"2025-01-11T01:04:56","date_gmt":"2025-01-11T01:04:56","guid":{"rendered":"https:\/\/peraltafinancing.com\/activist\/cdc-water-fluoridation-additives-engineering-fact-sheet-community-water-fluoridation-oral-health-welcome-to-fluoride-free-sudbury\/"},"modified":"2025-01-11T01:04:56","modified_gmt":"2025-01-11T01:04:56","slug":"cdc-water-fluoridation-additives-engineering-fact-sheet-community-water-fluoridation-oral-health-welcome-to-fluoride-free-sudbury","status":"publish","type":"post","link":"https:\/\/fivemor.com\/?p=21965","title":{"rendered":"CDC \u2013 Water Fluoridation Additives \u2013 Engineering Fact Sheet \u2013 Community Water Fluoridation \u2013 Oral Health \u2013 Welcome to Fluoride Free Sudbury"},"content":{"rendered":"<p> <br \/>\n<\/p>\n<div>\n<h3 class=\"wp-block-heading\">Sources of Fluoride Additives<\/h3>\n<p>Most fluoride additives used in the United States are produced from phosphorite rock. Phosphorite is mainly used for manufacturing phosphate fertilizer. Phosphorite contains calcium phosphate mixed with limestone (calcium carbonates) minerals and apatite\u2014a mineral with high phosphate and fluoride content.<strong> It is refluxed (heated) with <\/strong><strong>sulfuric acid <\/strong><strong>to produce a phosphoric acid-gypsum (calcium sulfate-CaSO4) slurry.<\/strong><\/p>\n<p>The heating process releases hydrogen fluoride (HF) and silicon tetrafluoride (SiF4) gases, which are captured by vacuum evaporators. <strong>These gases are then condensed to a water-based solution of approximately 23% FSA.<\/strong><\/p>\n<p>Approximately 95% of FSA used for water fluoridation comes from this process. The remaining 5% of FSA is produced in manufacturing hydrogen fluoride or from the use of hydrogen fluoride to etch silicates and glasses when manufacturing solar panels and electronics.<\/p>\n<p>Since the early 1950s, FSA has been the main additive used for water fluoridation in the United States. The favorable cost and high purity of FSA make it a popular additive. Sodium fluorosilicate and sodium fluoride are dry additives that come from FSA.<\/p>\n<p>FSA can be partially neutralized by either table salt (sodium chloride) or <strong>caustic soda<\/strong><strong> to get sodium fluorosilicate.<\/strong> <strong>If enough caustic soda is added to completely neutralize the fluorosilicate, the result is sodium fluoride.<\/strong> About 90% of the sodium fluoride used in the United States comes from FSA. Sodium fluoride is also produced by mixing caustic soda with hydrogen fluoride.<\/p>\n<h3 class=\"wp-block-heading\"><a\/>Regulatory Scope on Additives<\/h3>\n<p>The U.S. Environmental Protection Agency (EPA) has authority over safe community drinking water, as specified in the Safe Drinking Water Act. On the basis of the scientific study of potential harmful health effects from contaminated water, the EPA sets a Maximum Contaminant Level (MCL) concentration allowed for various organisms or substances.<\/p>\n<p>Although the EPA does not specifically regulate levels of \u201cdirect additives,\u201d which are additives added to water in the course of treatment, it does specify that the addition of chemicals as part of the treatment process should not be more than the MCL concentration for regulated substances. This MCL limit includes the levels naturally occurring in the source water, plus the contribution from direct additives. In 1979, EPA executed a Memorandum of Understanding with the U.S. Food and Drug Administration (FDA) to establish and clarify areas of authority in controlling additives in drinking water. FDA has regulatory oversight for food additives, which includes bottled water, and EPA has regulatory oversight of direct additives in public drinking water supplies.<\/p>\n<p><a href=\"https:\/\/web.archive.org\/web\/20160329155217\/https:\/\/www.cdc.gov\/fluoridation\/factsheets\/engineering\/wfadditives.htm\"><strong>https:\/\/web.archive.org\/web\/20160329155217\/https:\/\/www.cdc.gov\/fluoridation\/factsheets\/engineering\/wfadditives.htm<\/strong><\/a><\/p>\n<\/p><\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Sources of Fluoride Additives Most fluoride additives used in the United States are produced from phosphorite rock. Phosphorite is mainly used for manufacturing phosphate fertilizer. Phosphorite contains calcium phosphate mixed with limestone (calcium carbonates) minerals and apatite\u2014a mineral with high phosphate and fluoride content. It is refluxed (heated) with sulfuric acid to produce a phosphoric [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4302,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12022],"tags":[14564,14562,6876,14565,13789,14563,806,807,597,2561,3382,14566,638],"dealstore":[],"offerexpiration":[],"class_list":["post-21965","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-activist","tag-additives","tag-cdc","tag-community","tag-engineering","tag-fact","tag-fluoridation","tag-fluoride","tag-free","tag-health","tag-oral","tag-sheet","tag-sudbury","tag-water"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CDC \u2013 Water Fluoridation Additives \u2013 Engineering Fact Sheet \u2013 Community Water Fluoridation \u2013 Oral Health \u2013 Welcome to Fluoride Free Sudbury - Som2ny Network<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fivemor.com\/?p=21965\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CDC \u2013 Water Fluoridation Additives \u2013 Engineering Fact Sheet \u2013 Community Water Fluoridation \u2013 Oral Health \u2013 Welcome to Fluoride Free Sudbury - Som2ny Network\" \/>\n<meta property=\"og:description\" content=\"Sources of Fluoride Additives Most fluoride additives used in the United States are produced from phosphorite rock. Phosphorite is mainly used for manufacturing phosphate fertilizer. Phosphorite contains calcium phosphate mixed with limestone (calcium carbonates) minerals and apatite\u2014a mineral with high phosphate and fluoride content. It is refluxed (heated) with sulfuric acid to produce a phosphoric [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fivemor.com\/?p=21965\" \/>\n<meta property=\"og:site_name\" content=\"Som2ny Network\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-11T01:04:56+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/fivemor.com\/wp-content\/uploads\/2025\/01\/blank.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"200\" \/>\n\t<meta property=\"og:image:height\" content=\"200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fivemor.com\/?p=21965#article\",\"isPartOf\":{\"@id\":\"https:\/\/fivemor.com\/?p=21965\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/fivemor.com\/#\/schema\/person\/b85e3c3dc0e1daea076524dc8810c371\"},\"headline\":\"CDC \u2013 Water Fluoridation Additives \u2013 Engineering Fact Sheet \u2013 Community Water Fluoridation \u2013 Oral Health \u2013 Welcome to Fluoride Free Sudbury\",\"datePublished\":\"2025-01-11T01:04:56+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fivemor.com\/?p=21965\"},\"wordCount\":438,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fivemor.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/fivemor.com\/?p=21965#primaryimage\"},\"thumbnailUrl\":\"https:\/\/fivemor.com\/wp-content\/uploads\/2025\/01\/blank.jpg\",\"keywords\":[\"Additives\",\"CDC\",\"community\",\"Engineering\",\"Fact\",\"Fluoridation\",\"Fluoride\",\"Free\",\"Health\",\"Oral\",\"SHEET\",\"Sudbury\",\"water\"],\"articleSection\":[\"Activist\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fivemor.com\/?p=21965#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fivemor.com\/?p=21965\",\"url\":\"https:\/\/fivemor.com\/?p=21965\",\"name\":\"CDC \u2013 Water Fluoridation Additives \u2013 Engineering Fact Sheet \u2013 Community Water Fluoridation \u2013 Oral Health \u2013 Welcome to Fluoride Free Sudbury - 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