{"data":{"postcode":"E15 2NE","geographic_basis":"point_intersection_at_postcode_centroid","mapping_round":4,"analysis_year":2022,"reference_period":{"from":"2021-01-01","to":"2021-12-31"},"road":{"lden":{"status":"available","band_lower_db":55,"band_upper_db":60},"lnight":{"status":"available","band_lower_db":45,"band_upper_db":50}},"rail":{"lden":{"status":"not_mapped","band_lower_db":null,"band_upper_db":null},"lnight":{"status":"not_mapped","band_lower_db":null,"band_upper_db":null}},"airport":{"lden":{"status":"not_mapped","band_lower_db":null,"band_upper_db":null},"lnight":{"status":"not_mapped","band_lower_db":null,"band_upper_db":null}}},"sources":[{"slug":"onspd","name":"ONS Postcode Directory","publisher":"Office for National Statistics","source_url":"https://geoportal.statistics.gov.uk/search?categories=ons+postcode+directory","licence_name":"Open Government Licence v3.0","licence_url":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","as_of":"2026-05","imported_at":"2026-08-07T21:25:53.291Z"},{"slug":"defra-road-noise-round4","name":"Road noise — all metrics, England, Round 4","publisher":"Department for Environment, Food and Rural Affairs","source_url":"https://environment.data.gov.uk/dataset/562c9d56-7c2d-4d42-83bb-578d6e97a517","licence_name":"Open Government Licence v3.0","licence_url":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","as_of":"round-4-2022-analysis-2023-12-08","imported_at":"2026-08-30T18:19:06.572Z"},{"slug":"defra-rail-noise-round4","name":"Rail noise — all metrics, England, Round 4","publisher":"Department for Environment, Food and Rural Affairs","source_url":"https://environment.data.gov.uk/dataset/3fb3c2d7-292c-4e0a-bd5b-d8e4e1fe2947","licence_name":"Open Government Licence v3.0","licence_url":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","as_of":"round-4-2022-analysis-2023-12-08","imported_at":"2026-08-30T18:25:38.676Z"},{"slug":"defra-airport-noise-round4","name":"Airport noise — all metrics, England, Round 4","publisher":"Department for Environment, Food and Rural Affairs","source_url":"https://environment.data.gov.uk/dataset/dac9cba4-abe7-43bd-b8e9-8a83da52edd8","licence_name":"Open Government Licence v3.0","licence_url":"https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","as_of":"round-4-2022-analysis-2023-12-08","imported_at":"2026-08-30T18:42:09.354Z"}],"notices":["dataset_unavailable means that the corresponding source has no completed import; not_mapped is used only after that source has been loaded.","Round 4 maps model annual-average noise from major roads, major railways, airports and agglomerations; not_mapped does not mean quiet or no noise.","The published values are five-decibel bands modelled four metres above ground, not measurements at a property.","The lookup uses the ONS postcode centroid, which is not a building or entrance."]}