
{"id":11508,"date":"2023-09-13T10:53:15","date_gmt":"2023-09-13T14:53:15","guid":{"rendered":"https:\/\/www.tampabaywater.org\/?page_id=11508"},"modified":"2025-07-22T06:05:31","modified_gmt":"2025-07-22T10:05:31","slug":"epa-study-results","status":"publish","type":"page","link":"https:\/\/www.tampabaywater.org\/quality\/water-quality-concerns\/pfas\/epa-study-results\/","title":{"rendered":"EPA Study Results"},"content":{"rendered":"\n<div class=\"wp-block-group mb-30 has-dark-blue-color has-gray-background-color has-text-color has-background\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group container\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\"><h1 class=\"wp-block-post-title has-text-color has-dark-blue-color\">EPA Study Results<\/h1><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group container\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns sidebar-column is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p class=\"wp-block-paragraph\">Tampa Bay Water tested the regional drinking water supply for PFAS, alongside its member utilities during EPA\u2019s nationwide study. This helps EPA set regulations for PFAS and it helps Tampa Bay Water determine if treatment is needed, where treatment is needed and how much treatment is needed. Tampa Bay Water and five of its members began testing in July 2023. The City of Tampa began testing in January 2023.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Find out more about PFAS on our <a href=\"https:\/\/www.tampabaywater.org\/quality\/water-quality-concerns\/pfas\/\" class=\"ek-link\">main PFAS page<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Things to know about these results<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Note: parts per trillion are spelled out in all cases on this page. The ppt acronym is used on our main PFAS page.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The six PFAS in the sampling results tables are those for which EPA had set Maximum Contaminant Levels prior to May 2025. The EPA study includes a total of 29 PFAS. Links to the full tables are provided below.<\/li>\n\n\n\n<li>PFOA and PFOS Maximum Contaminant Levels are each 4.0 parts per trillion.<\/li>\n\n\n\n<li>EPA's Hazard Index was a calculation used to determine combined levels of four PFAS. The Hazard Index Maximum Contaminant Level was1. The individual health-based values for each substance used in the calculation were: <em>NOTE: EPA Announced its intent to rescind these regulations and reconsider regulatory determinations.<\/em>\n<ul class=\"wp-block-list\">\n<li>PFBS - 2,000 parts per trillion<\/li>\n\n\n\n<li>PFHxS - 9 parts per trillion<\/li>\n\n\n\n<li>PFNA - 10 parts per trillion<\/li>\n\n\n\n<li>HFPO-DA (Gen X) - 10 parts per trillion<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>ND means no detectable levels of PFAS were found using EPA Methods 533 and 537.1.<\/li>\n\n\n\n<li>Tampa Bay Water\u2019s member utilities use contract laboratories to perform testing for the EPA study. EPA prohibits contract laboratories from reporting detections below its minimum reporting level so results reported by Tampa Bay Water may appear different from our members\u2019 contract labs in some cases. Tampa Bay Water is voluntarily testing drinking water supplies during the EPA study in its state-certified laboratory and is not subject to EPA reporting requirements.\n<ul class=\"wp-block-list\">\n<li>EPA reporting requirements are intended to ensure data quality consistency from the many contributing nationwide laboratories that have varying capabilities. For more information please see the <a href=\"https:\/\/www.epa.gov\/dwucmr\/fifth-unregulated-contaminant-monitoring-rule\" target=\"_blank\" aria-label=\" (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Fifth Unregulated Contaminant Monitoring Rule | US EPA<\/a>.<\/li>\n\n\n\n<li>Additionally, when measuring at parts per trillion, results may vary slightly due to differences in samples, equipment, analytical instruments and technicians. This is common and is one of the reasons why EPA bases its limits on annual averages.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>NOTE: In May 2025, EPA stated its intent to extend the compliance deadline from 2029 to 2031, and rescind the regulations and reconsider regulatory determinations for perfluorohexanesulfonic acid (PFHxS), perfluorononanoic acid (PFNA), and hexafluoropropylene oxide dimer acid (HFPO-DA).<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">First Quarter Sampling Results<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>EPA&nbsp;Fifth Unregulated Contaminant Monitoring Rule Study Sampling Results in Parts Per Trillion<br>First Quarter (of four quarters) \u2013 July 2023<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"860\" height=\"521\" src=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q1_Results_Table_web.png\" alt=\"Quarter 1 PFAs testing results\" class=\"wp-image-13068\" srcset=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q1_Results_Table_web.png 860w, https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q1_Results_Table_web-300x182.png 300w, https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q1_Results_Table_web-768x465.png 768w\" sizes=\"auto, (max-width: 860px) 100vw, 860px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q1-Full-Results-Table.pdf\" target=\"_blank\" aria-label=\" (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Download the full results table<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Second Quarter Sampling Results<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>EPA&nbsp;Fifth Unregulated Contaminant Monitoring Rule Study Sampling Results in Parts Per Trillion<br>Second Quarter (of four quarters) \u2013 October 2023<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q2_Results_Table_web.png\" alt=\"Quarter 2 PFAs Testing Results\" style=\"object-fit:cover\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q2-Full-Results-Table.pdf\" target=\"_blank\" aria-label=\" (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Download the full results table<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Third Quarter Sampling Results<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>EPA&nbsp;Fifth Unregulated Contaminant Monitoring Rule Study Sampling Results in Parts Per Trillion<br>Third Quarter (of four quarters) \u2013 January 2024<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"861\" height=\"551\" src=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q3_Results_Table_web.png\" alt=\"Quarter 3 PFAs testing results\" class=\"wp-image-13070\" style=\"object-fit:cover\" srcset=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q3_Results_Table_web.png 861w, https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q3_Results_Table_web-300x192.png 300w, https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q3_Results_Table_web-768x491.png 768w\" sizes=\"auto, (max-width: 861px) 100vw, 861px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q3-Full-Results-Table.pdf\" target=\"_blank\" aria-label=\" (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Download the full results table<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fourth Quarter Sampling Results<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>EPA&nbsp;Fifth Unregulated Contaminant Monitoring Rule Study Sampling Results in Parts Per Trillion<br>Fourth Quarter (of four quarters) \u2013 April 2024<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"862\" height=\"553\" src=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q4_Results_Table_web.png\" alt=\"Quarter 4 PFAs testing results\" class=\"wp-image-13071\" style=\"object-fit:cover\" srcset=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q4_Results_Table_web.png 862w, https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q4_Results_Table_web-300x192.png 300w, https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q4_Results_Table_web-768x493.png 768w\" sizes=\"auto, (max-width: 862px) 100vw, 862px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.tampabaywater.org\/wp-content\/uploads\/Q4-Full-Results-Table.pdf\" target=\"_blank\" aria-label=\" (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Download the full results table<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Visit your local utility's PFAS page:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.hillsboroughcounty.org\/en\/residents\/property-owners-and-renters\/water-and-sewer\/pfas\" target=\"_blank\" aria-label=\"Hillsborough County (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Hillsborough County<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.pascocountyfl.net\/851\/Water-Quality-Reports\" target=\"_blank\" aria-label=\"Pasco County (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Pasco County<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/pinellas.gov\/per-and-polyfluoroalkyl-substances-pfas\/\" target=\"_blank\" aria-label=\"Pinellas County (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Pinellas County<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.cityofnewportrichey.org\/city-departments\/public-works\/water-production\/\" target=\"_blank\" aria-label=\"New Port Richey (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">New Port Richey<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.stpete.org\/residents\/utilities\/water_services\/drinking_water.php\" target=\"_blank\" aria-label=\"St. Petersburg (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">St. Petersburg<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.tampa.gov\/water\/water-quality\/pfas\" target=\"_blank\" aria-label=\"Tampa (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"ek-link\">Tampa<\/a><\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\"><div class=\"sidebar-menu\">\n\t<nav aria-label=\"in-page\" class=\"site-header__nav\">\n\t\t                                                                                                                                        <ul id=\"menu-main-menu\" class=\"nav__inner nav-side\"><li class=' menu-item menu-item-type-post_type menu-item-object-page menu-item-home'><a 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This helps EPA set regulations for PFAS and it helps Tampa...","protected":false},"author":2,"featured_media":0,"parent":8474,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_editorskit_title_hidden":false,"_editorskit_reading_time":9,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_crdt_document":"","footnotes":""},"class_list":["post-11508","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>EPA Study Results - Tampa Bay Water<\/title>\n<meta name=\"description\" content=\"Per- and polyfluoroalkyl substances (PFAS) are man-made compounds that include up to 5,000 chemicals. 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