Monthly Hydrological Summaries

Logo for the National Hydrological Monitoring Programme

The National Hydrological Monitoring Programme (NHMP) produces the monthly Hydrological Summary of the UK. This regular report describes the hydrological conditions during the preceding month, using the data holdings of the National River Flow Archive and National Groundwater Level Archive. Focusing on rainfall, river flows, groundwater levels, and reservoir stocks, it places the events of each month, and the conditions at the end of the month, in a historical context. 

Each report includes regional rainfall data - both recent and, where significant, longer-term accumulations for the major administrative divisions in the water industry. Also featured are maps and representative hydrographs of river flow and groundwater levels with supporting summary statistics and details of current stocks for a selection of major reservoirs. A commentary examines notable hydrological events and summarises both the national hydrological status and the water resources outlook. 

The Hydrological Summary is published on the 10th working day every month via this web-page, Twitter, and to those who have signed up to receive them by email. 


Sign up to receive the monthly Hydrological Summary by email.

Latest month 

The Hydrological Summary for the latest month can be downloaded at the below link:

Latest Hydrological Summary for the UK

The latest Hydrological Summary will also be available in the NERC Open Research Archive (NORA) and displayed in the below list soon after publication. 


Archived versions of the Hydrological Summary are available in pdf format from December 1988. To access hydrological summaries from the archive, please use the below list.

Misinterpreting carbon accumulation rates in records from near-surface peat View PDF on NORA
Diatoms as indicators of the effects of river impoundment at multiple spatial scales View PDF on NORA
Insights into rainfall undercatch for differing raingauge rim heights View PDF on NORA
Spatio-temporal patterns of air pollution in China from 2015 to 2018 and implications for health risks View PDF on NORA
Fragmentation and thresholds in hydrological flow‐based ecosystem services View PDF on NORA
How are nature based solutions contributing to priority societal challenges surrounding human well-being in the United Kingdom: a systematic map protocol View PDF on NORA
Analysis of 129I and 127I in soils of the Chernobyl Exclusion Zone, 29 years after the deposition of 129I View PDF on NORA
Microbial control of the greenhouse whitefly (Trialeurodes vaporariorum) using a standardised bioassay method View PDF on NORA
Impact of water table levels and winter cover crops on greenhouse gas emissions from cultivated peat soils View PDF on NORA
Biological traits and the transfer of persistent organic pollutants through river food webs View PDF on NORA
More than thirty years after the Chernobyl accident: what do we know about the effects of radiation on the environment? View PDF on NORA
(Inter)nationalising the antibiotic research and development pipeline View PDF on NORA