United Utilities Event Duration Monitoring 2025

This file was last updated on 19 Aug 2026. Timestamps within this dataset are published to whole-second precision. The overall objective of this use case is to proactively publish data that is regularly requested via Environmental Information Requests (EIRs). By supplying historic data about the activity of event duration monitors situated at storm overflows, we believe that we can reduce requests for localised storm overflow performance data. United Utilities' storm overflow map and the National Storm Overflow Hub for England facilitate the near-real time reporting of storm overflow data that has undergone initial automated validation; this should be viewed as indicative rather than fully verified. This file contains start/stop spill data for 2025, and is a further validated version of the near-real time data from the storm overflow map. The locations shown in the data may differ slightly from the storm overflow map as this represents the location the UU discharge leaves our network. For example, the data location may show the location of discharge to an underground culverted watercourse, whilst the storm overflow map may show the location of the culvert discharge to a watercourse. This location may be remote from the pumping station or treatment works. Watercourses often receive inputs from sources other than storm overflows such as highway drainage, surface water, run off from agricultural land and culverted watercourses. Please be aware that the SiteId field was updated for 2024. While the underlying sites themselves are unchanged, their identifier values have been revised from the 2023 format. Historically, storm overflow identifiers were not standardised across the industry. Following a request from DEFRA, water and sewerage companies are now adopting a consistent, national format. This standardisation enhances data quality, streamlines reporting, and improves the reliability of cross‑system integrations. The provided lookup table maps the previous identifiers to the new ones, enabling you to migrate any historical data you may hold. If you are not capturing historical data, it is unlikely this change will affect you. Schema (where fields are not mandatory, columns will be present in the dataset to reflect the schema but may not contain data): Field Name DESCRIPTION DATA TYPE EXAMPLE DATA SiteId * Unique identity of the Storm Overflow String ABC123 SiteName The name given to the Storm Overflow String Paris Road SO ReceivingWatercourse The name of the watercourse into which a discharge is directed String River Trent PermitReference The reference for the permit used String abc123 OutfallLatitude * Latitude of the outfall Float 52.21691 OutfallLongitude * Longitude of the outfall Float 0.14449 IsBathingWater An indication of whether the outfall meets a designated bathing water Boolean True BathingWaterName The name of the bathing water into which the outfall discharges String Spring Lake EventId The unique identifier assigned to this event String abc123 EventStart * Date and Time that the monitor indicated a discharge had started DateTime YYYY-MM-DDTHH:mm:ss EventEnd * Date and Time that the monitor indicated a discharge had ended DateTime YYYY-MM-DDTHH:mm:ss Duration The length of time between the event’s start and stop time Duration P3Y6M4DT12H30M5S EventVerified An indication of whether this event is verified at the time of it being published Boolean False *Mandatory **Requires a standard value本文件最后更新于2026年8月19日。本数据集内的时间戳精度为整秒级。本应用场景的总体目标为主动发布通过环境信息请求（Environmental Information Requests, EIRs）高频索要的数据。通过提供设置于风暴溢流（storm overflow）处的事件时长监测设备的运行历史数据，我们认为可降低针对本地化风暴溢流性能数据的请求量。联合公用事业公司（United Utilities, UU）的风暴溢流地图及英格兰国家风暴溢流枢纽，可提供经过初步自动验证的风暴溢流数据的近实时上报服务；此类数据仅作参考，并非完全核实后的结果。 本文件包含2025年的溢流启停数据，是对风暴溢流地图中近实时数据的进一步验证版本。数据中展示的位置可能与风暴溢流地图存在细微差异，因为此处标注的是联合公用事业公司（UU）排污管网的排放点位。例如，数据中的位置可能显示为地下暗渠水体的排放点，而风暴溢流地图可能会标注暗渠向开放水体的排放位置。该排放点位可能距离泵站或处理厂较远。水体通常还会接收来自其他源头的输入，例如公路排水、地表水、农业用地径流以及暗渠水体。 请注意，SiteId字段已于2024年完成更新。尽管站点本身未发生变更，但其标识符值已从2023年的格式完成修订。过往行业内的风暴溢流标识符并未实现统一标准。应环境、食品与农村事务部（DEFRA）的要求，水务及污水处理公司目前正采用统一的国家标准格式。此项标准化工作提升了数据质量、简化了报告流程，并提高了跨系统集成的可靠性。随附的对照表可将旧标识符映射至新标识符，方便您迁移可能持有的历史数据。若您无需留存历史数据，则此变更大概率不会对您产生影响。 以下为数据架构（若字段非强制要求，则数据集中将包含对应字段，但可能不含实际数据）： | 字段名称 | 描述 | 数据类型 | 示例数据 | | --- | --- | --- | --- | | SiteId * | 风暴溢流的唯一标识 | 字符串 | ABC123 | | SiteName | 风暴溢流的官方命名 | 字符串 | Paris Road SO | | ReceivingWatercourse | 接收排污的水体名称 | 字符串 | River Trent | | PermitReference | 所用排污许可证的编号 | 字符串 | abc123 | | OutfallLatitude * | 排污口纬度 | 浮点数 | 52.21691 | | OutfallLongitude * | 排污口经度 | 浮点数 | 0.14449 | | IsBathingWater | 标识该排污口是否符合指定游泳水域标准 | 布尔值 | True | | BathingWaterName | 该排污口排放所在的游泳水域名称 | 字符串 | Spring Lake | | EventId | 分配给本次溢流事件的唯一标识符 | 字符串 | abc123 | | EventStart * | 监测设备显示排放开始的日期与时间 | 日期时间 | YYYY-MM-DDTHH:mm:ss | | EventEnd * | 监测设备显示排放结束的日期与时间 | 日期时间 | YYYY-MM-DDTHH:mm:ss | | Duration | 事件起止时间之间的时长 | 时长 | P3Y6M4DT12H30M5S | | EventVerified | 标识该事件在发布时是否已完成核实 | 布尔值 | False | * 强制字段 ** 需采用标准取值