{"id":"2f8dfe38-bfa8-4f61-bc34-1d84d470a940","first_published_at":"2025-11-27T09:30:00.000Z","published_revision":{"id":"c1334b9b-df2c-4747-ace3-2f7397a5d243","revision_index":5,"previous_revision_id":"f3a55244-9a19-49d8-b585-ee5aabd4ed49","created_at":"2026-02-06T12:10:57.482Z","updated_at":"2026-02-06T12:14:04.488Z","approved_at":"2026-02-06T12:14:04.476Z","publish_at":"2026-02-06T12:50:00.000Z","metadata":[{"language":"cy-GB","title":"Data dangosyddion Mynegai Amddifadedd Lluosog Cymru (MALlC) 2025 fesul Ardal Gynnyrch Ehangach Haen Is (AGEHI) ac awdurdod lleol: maes yr amgylchedd ffisegol","summary":"Mynegai Amddifadedd Lluosog Cymru (MALlC) yw'r mesur swyddogol o amddifadedd cymharol ar gyfer ardaloedd bach yng Nghymru. Mae’n pennu safle pob un o'r 1,917 o Ardaloedd Cynnyrch Ehangach Haen Is (ACEHIau) o'r mwyaf (safle 1) i'r lleiaf (safle 1,917) difreintiedig. Mae'n cyfuno 54 o ddangosyddion wedi'u grwpio o dan 8 maes sydd â'r pwysau canlynol yn y mynegai cyffredinol: Incwm (22%), Cyflogaeth (20%), Iechyd (15%), Addysg (14%), Mynediad at Wasanaethau (10%), Tai (9%), Diogelwch Cymunedol (5%), a'r Amgylchedd Ffisegol (5%). \n\nMae MALlC yn cynhyrchu safleoedd maes a mynegai cyffredinol i nodi ardaloedd gyda'r crynodiadau uchaf o sawl math o amddifadedd. Mae'r rhan fwyaf o'r gwerthoedd dangosydd, rhai gwerthoedd is-ddangosydd a rhai safleoedd is-faes hefyd yn cael eu cyhoeddi ar StatsCymru. Gweler yr [adroddiad canllawiau ac adroddiad technegol MALlC]( https://www.llyw.cymru/mynegai-amddifadedd-lluosog-cymru-2025-cyfres) am ragor o wybodaeth.\n\nMae'r tabl hwn yn cynnwys data ar gyfer y 7 dangosydd sy'n ffurfio'r maes amgylchedd ffisegol.\n\nMae amcangyfrifon dangosyddion awdurdodau lleol wedi'u cynhyrchu lle mae'r data gwreiddiol yn caniatáu i’w hagregu i ddaearyddiaethau uwchben lefel ACEHI. Lle nad yw hyn yn bosibl ar gyfer dangosydd penodol, bydd cofnodion data awdurdod lleol yn dangos [x] yn y golofn Data. ","collection":"Diben y maes hwn yw mesur ffactorau yn yr ardal leol a all effeithio ar lesiant neu ansawdd bywyd y rhai sy’n byw mewn ardal. Mae gan y maes bwysoliad cymharol o 5% yn y mynegai cyffredinol.\n\nMaes yr amgylchedd ffisegol yn cynnwys 7 dangosydd, wedi’u grwpio’n 4 is-faes ac maent wedi’u pwysoli’n gyfartal ynddynt. \n\nMae’r is-faes ansawdd aer yn cynnwys 3 dangosydd sydd â’r un pwysoliad sy’n mesur y gwerthoedd crynodiad cyfartalog wedi’u pwysoli yn ôl y boblogaeth ar gyfer y llygryddion allweddol:\n * nitrogen deuocsid (NO2)\n * gronynnau llai na 10 micrometr μm (PM10) \n * gronynnau llai na 2.5 micrometr μm (PM2.5)\nMae’r data llygryddion yn ymwneud â 2023 ac yn dod o’r Adran yr Amgylchedd, Bwyd a Materion Gwledig (DEFRA).\n\nMae sgôr yr is-faes perygl llifogydd yn seiliedig ar gyfran yr aelwydydd sy’n wynebu perygl llifogydd o afonydd, y môr neu lifogydd dŵr wyneb, ond nid yw'n cyfrif am amddiffynfeydd rhag llifogydd.  Mae’r data yn ymwneud â 2025 ac yn dod o Asesu Perygl Llifogydd yng Nghymru (FRAW), Cyfoeth Naturiol Cymru (CNC).\n\nMae’r is-faes mannau gwyrdd yn cynnwys 2 ddangosydd sydd â’r un pwysoliad:\n * y dangosydd agosrwydd at fan gwyrdd naturiol hygyrch sy’n mesur cyfran yr aelwydydd ym mhob ardal sydd o fewn 300 metr (taith gerdded o tua 5 munud) i fan gwyrdd naturiol hygyrch. Mae’r data yn ymwneud â 2025 ac yn dod o Arolwg Ordnans a CNC.\n * y sgôr ar gyfer mannau gwyrdd amgylchol sy’n mesur pa mor wyrdd yw ardal gan ddefnyddio sgôr Mynegai Llystyfiant â Gwahaniaeth wedi’i Normaleiddio cymedrig cartrefi (NDVI) o fewn clustogfa o 300 metr o amgylch pob annedd breswyl. Mae’r data yn ymwneud â 2024 ac yn dod o ddelweddau lloeren adlewyrchol wyneb 3m gan Planet a broseswyd gan Brifysgol Abertawe\n\nMae sgôr yr is-faes llygredd sŵn yn seiliedig ar gyfran y boblogaeth sy’n cael ei hamlygu i lygredd sŵn o ffyrdd a rheilffyrdd sy’n fwy na 55 desibel neu’n hafal i hynny. Mae’r data yn ymwneud â 2025 ac yn dod o fapiau sŵn strategol Rownd 4, System Modelu Sŵn, Adran yr Amgylchedd, Bwyd a Materion Gwledig (DEFRA). Mae’r data yn ymwneud â 2021. ","quality":"Mae data MALlC 2025 wedi'u cynhyrchu gan ystadegwyr proffesiynol gan ddefnyddio'r data diweddaraf, dulliau dadansoddol trylwyr, a dilysu annibynnol ar bob cam. Mae MALlC 2025 yn adeiladu ar fersiynau blaenorol i sicrhau cywirdeb a dibynadwyedd, gan gyfuno 54 o ddangosyddion o ffynonellau amrywiol (mae rhai, ond nid pob un ohonynt, yn seiliedig ar ffynonellau ystadegau swyddogol) i leihau rhagfarn a chryfhau cadernid. Roedd sicrhau ansawdd yn cynnwys gwiriadau lluosog, atgynhyrchu canlyniadau, ac adolygiad arbenigol gydag arbenigwyr maes ac awdurdodau lleol.\n\nMae cyfrifiadau’r dangosyddion yn seiliedig ar ystod o ffynonellau swyddogol yn bennaf, gyda rhai elfennau wedi’u hamcangyfrif drwy fodelu.\n\nMae’r dangosydd Perygl Llifogydd yn ystyried cyfran yr aelwydydd sydd mewn perygl o lifogydd o afonydd, y môr a llifogydd dŵr wyneb. Mae’r risg yn seiliedig ar amlder rhagweledig, yn hytrach na lefel y difrod a achosir gan y llifogydd, ac nid yw’n cyfrif am amddiffynfeydd rhag llifogydd.","rounding_description":"Pob dangosydd wedi’i grynhoi i 1 pwynt degol","reason":"Newidiadau fformatio bach"},{"language":"en-GB","title":"Welsh Index of Multiple Deprivation (WIMD) 2025 indicator data by Lower layer Super Output Area (LSOA) and local authority: physical environment domain","summary":"The Welsh Index of Multiple Deprivation (WIMD) is the official measure of relative deprivation for small areas in Wales, ranking all 1,917 Lower Layer Super Output Areas (LSOAs) from most (rank 1) to least (rank 1,917) deprived. It combines 54 indicators grouped under 8 domains which have the following weights in the overall index: Income (22%), Employment (20%), Health (15%), Education (14%), Access to Services (10%), Housing (9%), Community Safety (5%), and Physical Environment (5%). \r\n\r\nWIMD produces domain ranks and an overall index to identify areas with the highest concentrations of multiple types of deprivation. Most of the indicator values, some sub-indicator values and some sub-domain ranks are also published on StatsWales. Please see the [WIMD guidance report and technical report]( https://www.gov.wales/welsh-index-multiple-deprivation-2025-series#Backgroundinformation) for more information.\r\n\r\nThis table contains data for the 7 indicators that form the physical environment domain. \r\n\r\nLocal authority indicator estimates have been produced where the original data allows for aggregating to geographies above LSOA level. Where this is not possible for a given indicator, local authority data entries will display [x] in the Data column.\r\n","collection":"The purpose of this domain is to measure factors in the local area that may impact on the wellbeing or quality of life of those living in an area. The domain has a relative weight of 5% in the overall index.\r\n\r\nThe physical environment domain has 7 indicators, grouped into 4 sub-domains and equally weighted within them. \r\n\r\nThe air quality sub-domain comprises 3 equally weighted indicators which measure the population weighted average concentration values of the key pollutants \r\n * nitrogen dioxide (NO2)\r\n * particulates less than 10 micrometres (PM10)\r\n * particulates less than 2.5 micrometres (PM2.5)\r\nPollutants data relates to 2023 and is sourced from the Department for Environment, Food & Rural Affairs (DEFRA). \r\n\r\nThe flood risk sub-domain score is based on the proportion of households at risk of flooding from rivers, the sea or surface flooding but it does not account for flood defences. Data relates to 2025 and is sourced from Flood Risk Assessment Wales (FRAW), Natural Resources Wales (NRW)\r\n\r\nThe green space sub-domain is comprised of 2 equally weighted indicators: \r\n * proximity to accessible natural green space indicator which measures the proportion of households in each area that are within 300 metres (an approximate 5 minute walk) of an accessible, natural green space. Data relates to 2025 and is sourced form Ordinance Survey and NRW.\r\n * ambient green space score which measures the ambient greenness of an area using the mean household Normalised Difference Vegetation Index (NDVI) score within a 300 metre buffer around each residential dwelling. Data relates to 2024 and is sourced from 3m surface reflectance satellite imagery from Planet processed by Swansea university.\r\n\r\nThe noise pollution sub-domain score is based on the proportion of the population exposed to noise pollution from road and rail sources greater than or equal to 55 decibels. Data relates to 2021 and is sourced from the round 4 strategic noise maps, Noise Modelling System (NMS), DEFRA. \r\n","quality":"The WIMD 2025 data have been produced by professional statisticians using the latest data, rigorous analytical methods, and independent validation at every stage. WIMD 2025 builds on previous versions to ensure accuracy and reliability, combining 54 indicators from diverse sources (some but not all are based on official statistics sources) to minimize bias and strengthen robustness. Quality assurance included multiple checks, replication of results, and expert review with domain specialists and local authorities. \r\n\r\nIndicator calculations are based on a range of mostly official sources, with some elements of estimation via modelling.\r\n\r\nThe flood risk indicator considers the proportion of households at risk of flooding from rivers, the sea and surface water flooding. The risk is based on predicted frequency, rather than the level of damage caused by flooding, and it does not account for flood defences.\r\n","rounding_description":"All indicators are rounded to 1DP.","reason":"Minor formatting changes"}],"rounding_applied":true,"update_frequency":{"update_type":"none"},"designation":"accredited","related_links":[{"id":"ANEsu","url":"https://www.gov.wales/welsh-index-multiple-deprivation-2025","created_at":"2025-11-26T18:30:01.082Z","label_en":"Welsh Index of Multiple Deprivation 2025","label_cy":"Welsh Index of Multiple Deprivation 2025"},{"id":"AtJwW","url":"https://www.llyw.cymru/mynegai-amddifadedd-lluosog-cymru-2025","created_at":"2025-11-26T18:31:09.776Z","label_en":"Mynegai Amddifadedd Lluosog Cymru 2025","label_cy":"Mynegai Amddifadedd Lluosog Cymru 2025"}],"providers":[{"id":"50e7bd28-e694-4f0e-b190-15539d07f6e0","group_id":"2c7cd0dd-065e-4e49-b179-c37006b08cfe","revision_id":"c1334b9b-df2c-4747-ace3-2f7397a5d243","language":"cy-gb","provider_id":"071111f8-9931-43fb-bef9-a10165056a82","provider_name":"Cyfoeth Naturiol Cymru","source_id":null,"created_at":"2026-02-06T12:10:57.482Z"},{"id":"21b5abfe-94d1-4ca8-afb0-b22d762b9e02","group_id":"2c7cd0dd-065e-4e49-b179-c37006b08cfe","revision_id":"c1334b9b-df2c-4747-ace3-2f7397a5d243","language":"en-gb","provider_id":"071111f8-9931-43fb-bef9-a10165056a82","provider_name":"Natural Resources Wales","source_id":null,"created_at":"2026-02-06T12:10:57.482Z"},{"id":"11826b76-efa4-4ca9-9dd4-a5d73fd95254","group_id":"8cba30ef-27ed-44de-a937-82a634177fd3","revision_id":"c1334b9b-df2c-4747-ace3-2f7397a5d243","language":"cy-gb","provider_id":"4c3223c9-ee68-4517-ad26-d496317b3741","provider_name":"Arolwg Ordnans","source_id":null,"created_at":"2026-02-06T12:10:57.482Z"},{"id":"3286b99b-e581-4644-b7e0-6f4eef1d75ca","group_id":"8cba30ef-27ed-44de-a937-82a634177fd3","revision_id":"c1334b9b-df2c-4747-ace3-2f7397a5d243","language":"en-gb","provider_id":"4c3223c9-ee68-4517-ad26-d496317b3741","provider_name":"Ordnance Survey","source_id":null,"created_at":"2026-02-06T12:10:57.482Z"},{"id":"91e884d4-90e5-4a52-ba4c-ee12f1ceb254","group_id":"6139a923-9e58-47fd-8d9e-a173ae439b88","revision_id":"c1334b9b-df2c-4747-ace3-2f7397a5d243","language":"cy-gb","provider_id":"60ee65a2-d65a-4da8-9420-84e76a1b6b38","provider_name":"Adran yr Amgylchedd, Bwyd a Materion Gwledig","source_id":null,"created_at":"2026-02-06T12:10:57.482Z"},{"id":"894d5204-9fb8-4390-ae34-9cb9f8cb99e6","group_id":"6139a923-9e58-47fd-8d9e-a173ae439b88","revision_id":"c1334b9b-df2c-4747-ace3-2f7397a5d243","language":"en-gb","provider_id":"60ee65a2-d65a-4da8-9420-84e76a1b6b38","provider_name":"Department for Environment, Food and Rural Affairs","source_id":null,"created_at":"2026-02-06T12:10:57.482Z"}],"topics":[{"id":86,"path":"86","name_en":"Poverty","name_cy":"Tlodi"},{"id":88,"path":"86.88","name_en":"Deprivation","name_cy":"Amddifadedd"}]},"publisher":{"group":{"id":"e50c0a08-0474-4cc3-b8a1-eea48a0046b5","name":"Social Justice","email":"statsinclusion@gov.wales"},"organisation":{"id":"4ef4facf-c488-4837-a65b-e66d4b525965","name":"Welsh Government"}}}