{"id":2359,"date":"2024-01-16T10:27:24","date_gmt":"2024-01-16T10:27:24","guid":{"rendered":"https:\/\/www.bgs.ac.uk\/groundwater\/quality\/shale-gas\/national-methane-baseline-survey-results-summary\/"},"modified":"2026-05-07T11:23:05","modified_gmt":"2026-05-07T10:23:05","slug":"national-methane-baseline-survey-results-summary","status":"publish","type":"page","link":"https:\/\/www.bgs.ac.uk\/groundwater\/energy\/shale-gas-and-groundwater\/national-methane-baseline-survey-of-uk-groundwaters\/national-methane-baseline-survey-results-summary\/","title":{"rendered":"Results summary"},"content":{"rendered":"\t\t\t<section class=\"hero-section hero-section-with-social\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info-wrap\">\n\t\t\t\t\t<div class=\"container\">\n\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info\">\n\t\t\t\t\t\t\t\t\t<h1>Results summary<\/h1>\n\t\t\t\t\t\t\t\t\t<p>National methane baseline survey<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n\t\t\t<div class=\"social-wrap social-wrap-inline-them\">\n\t\t\t\t<div class=\"sea-background-f\">\n\t\t\t\t\t<span>Share this article<\/span><a target=\"_blank\"  href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https:\/\/www.bgs.ac.uk\/groundwater\/energy\/shale-gas-and-groundwater\/national-methane-baseline-survey-of-uk-groundwaters\/national-methane-baseline-survey-results-summary\/\"><span class=\"icon-facebook\"><span class=\"hidden\">Facebook<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/twitter.com\/intent\/tweet?text=Results%20summary&#038;url=https:\/\/www.bgs.ac.uk\/groundwater\/energy\/shale-gas-and-groundwater\/national-methane-baseline-survey-of-uk-groundwaters\/national-methane-baseline-survey-results-summary\/\"><span class=\"icon-twitter\"><span class=\"hidden\">Twitter<\/span><\/span><\/a><a   onclick=\"javascript:void( (function() {var e=document.createElement('script' );e.setAttribute('type','text\/javascript' );e.setAttribute('charset','UTF-8' );e.setAttribute('src','\/\/assets.pinterest.com\/js\/pinmarklet.js?r='+Math.random()*99999999);document.body.appendChild(e)})());\"  href=\"javascript:void(0);\"><span class=\"icon-pinterest\"><span class=\"hidden\">Pinterest<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/wa.me?text=https:\/\/www.bgs.ac.uk\/groundwater\/energy\/shale-gas-and-groundwater\/national-methane-baseline-survey-of-uk-groundwaters\/national-methane-baseline-survey-results-summary\/\"><span class=\"icon-whatsapp\"><span class=\"hidden\">WhatsApp<\/span><\/span><\/a><a   href=\"mailto:?subject=Results%20summary&#038;body=%20(https:\/\/www.bgs.ac.uk\/groundwater\/energy\/shale-gas-and-groundwater\/national-methane-baseline-survey-of-uk-groundwaters\/national-methane-baseline-survey-results-summary\/)\"><span class=\"icon-mail\"><span class=\"hidden\">Email<\/span><\/span><\/a><a href=\"#\" data-copy=\"https:\/\/www.bgs.ac.uk\/groundwater\/energy\/shale-gas-and-groundwater\/national-methane-baseline-survey-of-uk-groundwaters\/national-methane-baseline-survey-results-summary\/\" class=\"copy-url-on-click\"><span class=\"icon-link\"><span class=\"hidden\">Copy Link<\/span><\/span><\/a><\/div><\/div>\t\t\t\t\t\t\t<\/section>\n\t\t\t\n\n\n<section class=\"wp-block-bgs-blocks-content-container content-section\"><div class=\"container\"><div class=\"row\"><div class=\"col-12\">\n<p class=\"wp-block-paragraph\">BGS&#8217;s national methane baseline survey of UK groundwaters in 2012 collected and analysed a total of 248 new groundwater methane (CH<sub>4<\/sub>) samples. Samples were collected from potable water supplies \u2014 either drinking water or groundwater-quality monitoring boreholes.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Summary report: <a href=\"http:\/\/nora.nerc.ac.uk\/514557\/\" target=\"_blank\" rel=\"noreferrer noopener\">The baseline concentrations of methane in Great British groundwater: the national methane baseline survey<\/a>&nbsp;<\/li>\n\n\n\n<li>Scientific publication: <a href=\"https:\/\/doi.org\/10.1016\/j.scitotenv.2017.05.191\" target=\"_blank\" rel=\"noreferrer noopener\">A baseline survey of dissolved methane in aquifers of Great Britain<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Detailed reports from each research areas:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>South Wales<\/li>\n\n\n\n<li>East Midlands<\/li>\n\n\n\n<li>Lancashire and Cheshire basins<\/li>\n\n\n\n<li>Cumbria and Northumberland<\/li>\n\n\n\n<li>southern England\u00a0(Kent, East and West Sussex, Surrey and Hampshire)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A number of groundwater CH<sub>4<\/sub> values also exist for other areas from previous research projects, in particular\u00a0central and southern Scotland,\u00a0parts of South Yorkshire, Nottinghamshire, Lincolnshire and areas around London. These datasets have been combined to provide a summary of CH<sub>4<\/sub> concentrations in groundwater in these areas.<\/p>\n\n\n\t\t\t<div id=\"wysiwyg-5226-block_23f9090d127b9a4547f35859537f8689\" class=\"  \" >\n\t\t\t<div class=\"col-12 responsive-table\"><table>\n<thead>\n<tr>\n<th data-name=\"Area\">Area<\/th>\n<th data-name=\"Concentration\">Concentration<\/th>\n<th data-name=\"\u00a0(mg\/l)\">\u00a0(mg\/l)<\/th>\n<th data-name=\"\"><\/th>\n<th data-name=\"No. samples\">No. samples<\/th>\n<\/tr>\n<tr>\n<th data-name=\"\"><\/th>\n<th data-name=\"Minimum\">Minimum<\/th>\n<th data-name=\"Median\">Median<\/th>\n<th data-name=\"Maximum\">Maximum<\/th>\n<th data-name=\"\"><\/th>\n<\/tr>\n<\/thead>\n<tbody><tr>\n<td>Central\/southern Scotland<\/td>\n<td>&lt;0.0001<\/td>\n<td>0.0036<\/td>\n<td>1.68<\/td>\n<td>31<\/td><\/tr><tr>\n<td>Lancashire and Cheshire basins<\/td>\n<td>0.0002<\/td>\n<td>0.0025<\/td>\n<td>0.091<\/td>\n<td>23<\/td><\/tr><tr>\n<td>East Midlands province<\/td>\n<td>&lt;0.00005<\/td>\n<td>0.0009<\/td>\n<td>1.32<\/td>\n<td>93<\/td><\/tr><tr>\n<td>Southern England<\/td>\n<td>&lt;0.00005<\/td>\n<td>0.0013<\/td>\n<td>4.72<\/td>\n<td>251<\/td><\/tr><tr>\n<td>South Wales<\/td>\n<td>&lt;0.0001<\/td>\n<td>0.032<\/td>\n<td>0.0483<\/td>\n<td>25<\/td><\/tr><tr>\n<td>Cumbria and Northumberland<\/td>\n<td>&lt;0.0002<\/td>\n<td>0.00065<\/td>\n<td>1.434<\/td>\n<td>16<\/td><\/tr><tr>\n<td>Cumbria (Environment Agency data)<\/td>\n<td>&lt;0.1<\/td>\n<td>&lt;0.5<\/td>\n<td>14.2<\/td>\n<td>836<\/td><\/tr><tr>\n<td>Lancashire and Cheshire (Environment Agency data)<\/td>\n<td>&lt;0.01<\/td>\n<td>&lt;0.5<\/td>\n<td>132<\/td>\n<td>2842<\/td><\/tbody>\n<\/table><\/div>\n<p>&nbsp;<\/p>\n\t\t\t<\/div>\n\t\t\t\n\n\n<p class=\"wp-block-paragraph\">None of the samples in the aquifers used for public water supply exceeded the explosive limit for CH<sub>4<\/sub>. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For additional information on research carried out by BGS on CH<sub>4<\/sub> in groundwater apart from baseline surveys, please go to our&nbsp;<a href=\"https:\/\/www.bgs.ac.uk\/groundwater\/quality\/methane-in-uk-groundwater-research-overview\/\">CH<sub>4<\/sub> in UK groundwater research overview<\/a>&nbsp;or access these key publications:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/doi.org\/10.1016\/j.chemgeo.2005.11.003\" target=\"_blank\" rel=\"noreferrer noopener\">The hydrogeochemistry of methane: evidence from English groundwaters<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/doi.org\/10.1016\/j.scitotenv.2004.07.019\" target=\"_blank\" rel=\"noreferrer noopener\">The potential for methane emissions from groundwaters of the UK&nbsp;<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">CH<sub>4<\/sub> in UK groundwater<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to CH<sub>4<\/sub> data, there is a regional overview of the geology, aquifers and shale-gas source rocks. Areas with adequate CH<sub>4<\/sub> data have been split by aquifer, in addition to a regional summary. There is also a brief overview of the relevant aquifer\u2019s groundwater quality using data collected as part of BGS and Environment Agency&#8217;s&nbsp;<a href=\"https:\/\/www.bgs.ac.uk\/groundwater\/quality\/baseline-chemistry-uk-aquifers\/\">natural (baseline) chemistry of groundwaters in England and Wales<\/a>&nbsp;project.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Further information on chemical indicators and trace elements that are not included in the summary can be found in the individual baseline reports.<\/p>\n<\/div><\/div><\/div><\/section>\n\n\n<section class=\"cta-section  sea-background-e \">\n\t<div class=\"container\">\n\t\t<div class=\"row md-row\">\n\t\t\t<div class=\"col-12\">\n\t\t\t\t<h2>Need more information?<\/h2>\t\t\t\t\t\t\t\t<div class=\"btn-wrap\"><a href=\"https:\/\/www.bgs.ac.uk\/contact-the-person\/?employee=smedley-pauline\"  class=\"button primary-background   \">Contact Pauline Smedley<\/a><\/div>\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/section>\n\t","protected":false},"excerpt":{"rendered":"","protected":false},"author":6,"featured_media":0,"parent":2308,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"1","_relevanssi_noindex_reason":"","footnotes":""},"tags":[],"class_list":["post-2359","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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