Hydrology Monthly Bulletin 

One of the EPA’s goals is to make environmental information available to the public and our stakeholders in a timely and accessible manner.  In May 2020, we started to publish a monthly national hydrology bulletin.   

The bulletin provides a factual summary of river flows, lake levels and groundwater levels for the previous month. It includes a comparison to the long-term historic monthly values. 

The bulletin also contains:  

  • Graphs showing river flow and water levelfor a sample of the surface water and groundwater hydrometric stations across Ireland 
  • Maps which show how flows and levels at stations across the country compare to the average for the month 

The hydrometric data used in the publication are produced from the EPA/local authority and OPW hydrometric networks.  The weather summary information contained in the bulletin is provided courtesy of Met Éireann. 

Read the Hydrology Summary Bulletins below.

Hydrology Summary Bulletin

October 2021

Hydrology Summary Bulletin for October 2021 outlining the flows in rivers, rainfall, lake levels, groundwater levels and spring outflows of over 300 stations across Ireland.