Dissolved oxygen, temperature and salinity measurements in coastal and estuarine waters in the UK from 1990 to 2018

Data on dissolved oxygen, temperature and salinity in estuarine and coastal waters were obtained from field-based monitoring programmes in England, Scotland, Wales and Northern Ireland under EU Directives (the Water Framework Directive, WFD, the Urban Waste Water Treatment Directive, UWWTD, and the Nitrates Directive, ND). These data have been held in institutional databases, and used in national and regional assessments of ecological or environmental status, which describe summary statistics and overall outcomes using physical, chemical and biological parameters/indicators and generally do not present the underlying data. For recent work on trends in dissolved oxygen concentrations in UK waters from 1990 to 2018 (Painting et al. in prep), the raw data on dissolved oxygen (DO) concentrations and all supporting metadata (e.g. latitude, longitude, water column depth, sample depth, temperature, salinity) for coastal and estuarine waters were extracted from institutional databases and combined into one dataset, which is provided here.