In 2022, all countries in the United Kingdom reported a high drinking water quality compliance. For instance, more than 99.9 percent of sampled sites in England met the required standards that year.

The United Kingdom: Percent rural population with access to drinking water: The latest value from is percent, unavailable from percent in . In comparison, the world average is 0.0 percent, based on data from countries. Historically, the average for the United Kingdom from to is percent. The minimum value, percent, was reached in while the maximum of percent was recorded in .

The United Kingdom: Percent urban population with access to drinking water: The latest value from is percent, unavailable from percent in . In comparison, the world average is 0.0 percent, based on data from countries. Historically, the average for the United Kingdom from to is percent. The minimum value, percent, was reached in while the maximum of percent was recorded in .

OverviewThis dataset provides the measurements of raw water storage levels in reservoirs crucial for public water supply. The reservoirs included in this dataset are natural bodies of water that have been dammed to store untreated water.Key DefinitionsAggregation The process of summarising or grouping data to obtain a single or reduced set of information, often for analysis or reporting purposes.CapacityThe maximum volume of water a reservoir can hold above the natural level of the surrounding land, with thresholds for regulation at 10,000 cubic meters in England, Wales and Northern Ireland and a modified threshold of 25,000 cubic meters in Scotland pending full implementation of the Reservoirs (Scotland) Act 2011.Current Level The present volume of water held in a reservoir measured above a set baseline crucial for safety and regulatory compliance.Current Percentage The current water volume in a reservoir as a percentage of its total capacity, indicating how full the reservoir is at any given time.Dataset Structured and organised collection of related elements, often stored digitally, used for analysis and interpretation in various fields. Granularity Data granularity is a measure of the level of detail in a data structure. In time-series data, for example, the granularity of measurement might be based on intervals of years, months, weeks, days, or hours. ID Abbreviation for Identification that refers to any means of verifying the unique identifier assigned to each asset for the purposes of tracking, management, and maintenance. Open Data Triage The process carried out by a Data Custodian to determine if there is any evidence of sensitivities associated with Data Assets, their associated Metadata and Software Scripts used to process Data Assets if they are used as Open Data. Reservoir Large natural lake used for storing raw water intended for human consumption. Its volume is measurable, allowing for careful management and monitoring to meet demand for clean, safe water.Reservoir TypeThe classification of a reservoir based on the method of construction, the purpose it serves or the source of water it stores.Schema Structure for organising and handling data within a dataset, defining the attributes, their data types, and the relationships between different entities. It acts as a framework that ensures data integrity and consistency by specifying permissible data types and constraints for each attribute.Units Standard measurements used to quantify and compare different physical quantities.Data HistoryData OriginReservoir level data is sourced from water companies who may also update this information on their website and government publications such as the Water situation reports provided by the UK government. Data Triage ConsiderationsIdentification of Critical InfrastructureSpecial attention is given to safeguard data on essential reservoirs in line with the National Infrastructure Act, to mitigate security risks and ensure resilience of public water systems. Currently, it is agreed that only reservoirs with a location already available in the public domain are included in this dataset.Commercial Risks and AnonymisationThe risk of personal information exposure is minimal to none since the data concerns reservoir levels, which are not linked to individuals or households.Data Triage Review FrequencyAnnually unless otherwise requested. Data FreshnessIt is not currently possible to make the dataset live. Some companies have digital monitoring, and some are measuring reservoir levels analogically. This dataset may not be used to determine reservoir level in place of visual checks where these are advised.Publish FrequencyAnnuallyData SpecificationsData specifications define what is included and excluded in the dataset to maintain clarity and focus. For this dataset: • Each dataset covers measurements taken by the publisher. • This dataset is published periodically in line with the publisher’s capabilities.• Historical datasets may be provided for comparison but are not required.• The location data provided may be a point from anywhere within the body of water or on its boundary.• Reservoirs included in the dataset must be: o Open bodies of water used to store raw/untreated water o Filled naturally o Measurable o Contain water that may go on to be used for public supply ContextThis dataset must not be used to determine the implementation of low supply or high supply measures such as hose pipe bans being put in place or removed. Please await guidance from your water supplier regarding any changes required to your usage of water.Particularly high or low reservoir levels may be considered normal or as expected given the season or recent weather.This dataset does not remove the requirement for visual checks on reservoir level that are in place for caving/pot holing safety.Some water companies calculate the capacity of reservoirs differently than others. The capacity can mean the useable volume of the reservoir or the overall volume that can be held in the reservoir including water below the water table. For Wessex Water reservoir total capacity information is based on gross capacity of the reservoir. Current percentage full will be a percentage of this gross capacity.Level information is provided as meters below spillway. Where the water level is 0 m it is equal to the height of the spillway, which is equivalent to 100% of the total volume storage available.Supplementary InformationBelow is a curated selection of links for additional reading, which provide a deeper understanding of this dataset. 1. Uses of Reservoirs: https://britishdams.org/about-dams/dam-information/uses-for-reservoirs/2. Inventory of UK Reservoirs: https://catalogue.ceh.ac.uk/documents/f5a7d56c-cea0-4f00-b159-c3788a3b2b383. Reservoirs Act 1975 as applied in England: https://britishdams.org/assets/documents/Dam%20Legislation%20-%20England%20-%20October%202016.pdf4. Reservoirs Act (Northern Ireland) 2015: https://britishdams.org/assets/documents/Dam%20Legislation%20-%20Northern%20Ireland%20-%20October%202016.pdf5. Reservoirs (Scotland) Act 2011: https://britishdams.org/assets/documents/Dam%20Legislation%20-%20Scotland%20-%20October%202016.pdf6. Reservoirs Act 1975 as applied in Wales: https://britishdams.org/assets/documents/Dam%20Legislation%20-%20Wales%20-%20October%202016.pdf7. Monthly local reports on reservoir levels: https://www.gov.uk/government/publications/water-situation-local-area-reports

Overview   This dataset provides the measurements of raw water storage levels in reservoirs crucial for public water supply, The reservoirs included in this dataset are natural bodies of water that have been dammed to store untreated water.    Key Definitions   Aggregation  The process of summarizing or grouping data to obtain a single or reduced set of information, often for analysis or reporting purposes.    Capacity The maximum volume of water a reservoir can hold above the natural level of the surrounding land, with thresholds for regulation at 10,000 cubic meters in England, Wales and Northern Ireland and a modified threshold of 25,000 cubic meters in Scotland pending full implementation of the Reservoirs (Scotland) Act 2011. Current Level The present volume of water held in a reservoir measured above a set baseline crucial for safety and regulatory compliance. Current Percentage The current water volume in a reservoir as a percentage of its total capacity, indicating how full the reservoir is at any given time. Dataset  Structured and organized collection of related elements, often stored digitally, used for analysis and interpretation in various fields.   Granularity  Data granularity is a measure of the level of detail in a data structure. In time-series data, for example, the granularity of measurement might be based on intervals of years, months, weeks, days, or hours  ID  Abbreviation for Identification that refers to any means of verifying the unique identifier assigned to each asset for the purposes of tracking, management, and maintenance.   Open Data Triage  The process carried out by a Data Custodian to determine if there is any evidence of sensitivities associated with Data Assets, their associated Metadata and Software Scripts used to process Data Assets if they are used as Open Data.   Reservoir Large natural lake used for storing raw water intended for human consumption. Its volume is measurable, allowing for careful management and monitoring to meet demand for clean, safe water. Reservoir Type The classification of a reservoir based on the method of construction, the purpose it serves or the source of water it stores. Schema  Structure for organizing and handling data within a dataset, defining the attributes, their data types, and the relationships between different entities. It acts as a framework that ensures data integrity and consistency by specifying permissible data types and constraints for each attribute.   Units  Standard measurements used to quantify and compare different physical quantities.     Data History   Data Origin   Reservoir level data is sourced from water companies who may also update this information on their website and government publications such as the Water situation reports provided by the UK government. Data Triage Considerations  Identification of Critical Infrastructure Special attention is given to safeguard data on essential reservoirs in line with the National Infrastructure Act, to mitigate security risks and ensure resilience of public water systems. Currently, it is agreed that only reservoirs with a location already available in the public domain are included in this dataset. Commercial Risks and Anonymisation The risk of personal information exposure is minimal to none since the data concerns reservoir levels, which are not linked to individuals or households. Data Freshness It is not currently possible to make the dataset live. Some companies have digital monitoring, and some are measuring reservoir levels analogically. This dataset may not be used to determine reservoir level in place of visual checks where these are advised. Data Triage Review Frequency   Annually unless otherwise requested  Data Specifications  Data specifications define what is included and excluded in the dataset to maintain clarity and focus. For this dataset: Each dataset covers measurements taken by the publisher. This dataset is published periodically in line with the publisher’s capabilities Historical datasets may be provided for comparison but are not required The location data provided may be a point from anywhere within the body of water or on its boundary. Reservoirs included in the dataset must be: Open bodies of water used to store raw/untreated water Filled naturally Measurable Contain water that may go on to be used for public supply Context  This dataset must not be used to determine the implementation of low supply or high supply measures such as hose pipe bans being put in place or removed. Please await guidance from your water supplier regarding any changes required to your usage of water. Particularly high or low reservoir levels may be considered normal or as expected given the season or recent weather. This dataset does not remove the requirement for visual checks on reservoir level that are in place for caving/pot holing safety. Some water companies calculate the capacity of reservoirs differently than others. The capacity can mean the useable volume of the reservoir or the overall volume that can be held in the reservoir including water below the water table. Data Publish Frequency   Annually