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Hydrology Summary Bulletin – August 2025

Hydrology bulletin on rainfall, river flows, lake levels, groundwater levels and spring outflows for August 2025.

Rainfall in August was below average almost everywhere, driest in the south and east. It was wet
in parts of the west but dry elsewhere, as high pressure dominated through most of the month.
Temperatures were above average.

Average river flows for August decreased at 138 river monitoring stations assessed, compared to
July 2025. 65% of the monthly average river flows were below the normal long-term range, mainly
observed in the south, south-east and midlands. Lake and groundwater levels decreased at all the
monitoring sites when compared to July. 50% of lake levels and 62% of groundwater levels were
below the normal long-term range. Out of the four spring flows monitored, 2 were in the ‘normal’
range and 2 were ‘below normal’.

Monthly Hydrology Bulletin: Edition 063: August 2025

EPA-Hydrology-Bulletin-August-2025 Download

About EPA Monthly Hydrology Bulletin: Monthly Hydrology Bulletin – Catchments.ie – Catchments.ie

Access previous EPA monthly Hydrology Bulletins here: Monitoring & Assessment: Freshwater & Marine Publications | Environmental Protection Agency

About author

EPA Catchments Unit

Administrator

The EPA Catchments Unit is based in Dublin, and the team is involved with catchment science, chemistry, ecology, hydromorphology, modelling, Geographic Information Systems and planning. We work with the wider EPA, all of our local authorities, the Local Authority Waters and Communities Office, the Department of Housing, Planning and Local Government, and other public bodies and Departments to ensure we have the best available data and information about our catchments.

Who is involved?
Quite simply, everyone in Ireland has a role to play. This can be from something as simple as making sure you don’t pollute your local stream, or a local community working together to establish a Rivers Trust to enhance the rivers and lakes in their area, to a Government Department or Agency helping a Minister implement a new policy to help protect and enhance all our water bodies.

This website has been developed and is maintained by the Environmental Protection Agency, and is a collaboration between the Department of Housing, Planning and Local Government, the Environmental Protection Agency, and the Local Authority Waters Programme.

Local Authority Waters Programme

The Local Authority Waters Programme coordinates the efforts of local authorities and other public bodies in the implementation of the River Basin Management Plan, and supports local community and stakeholder involvement in managing our natural waters, for everyone’s benefit.

Environmental Protection Agency

The EPA is responsible for coordinating the monitoring, assessment and reporting on the status of our 4,842 water bodies, looking at trends and changes, determining which waterbodies are at risk and what could be causing this, and drafting environmental objectives for each.

Department of Housing, Local Government and Heritage

The Department is responsible for making sure that the right policies, regulations and resources are in place to implement the Water Framework Directive, and developing a River Basin Management Plan and Programme of Measures to protect and restore our waters.