Welcome to Defra Data Services Forum

Within the WQA - If you click on the explore tab, you can select England and this will return all results for a particular time frame: https://environment.data.gov.uk/water-quality/view/explore

For a map on the data locations please refer to the following:

Introduction about the data - https://environment.data.gov.uk/water-quality/view/doc/reference

 It provides a link to the operational areas: https://www.gov.uk/government/publications/environment-agency-area-and-region-operational-locations