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Pollution Control


Discharge licences 

Effluent Discharge Licences 

If your business discharges trade effluent to water / groundwater or sewer, this activity is licensable under Section 4 or Section 16 of the Local Government (Water Pollution) Act 1977 and 1990 (as amended). 

Licence applications for discharge of trade effluent to waters are made to the Local Authority. Discharges to sewers are made to Irish Water. 

Discharge Licences to Waters 

Application forms and guidance relating to discharges to surface water can be obtained by clicking on the links below. 

Discharge Licences to Groundwaters 

Application forms and guidance relating to discharges to groundwater can be obtained by clicking on the links below. 

Discharge Licences to Sewers

Discharges to sewers are licenced under section 16 of the Act and applications are to be made online to Irish Water. Click here.


Water Quality Protection  

River Basin Management Plan 2018-2021

To access the latest River Basin Management Plan for Ireland, click here  

This Plan sets out the actions or measures that Ireland will take to improve water quality and achieve ‘good’ ecological status in water bodies (rivers, lakes, estuaries and coastal waters) by 2027 as is required under the Water Framework Directive (WFD).  

To find out more information on water quality in your local area or water quality activities throughout the country, visit  

Significant Water Management Issues 

The Department of Housing, Planning and Local Government has published a document outlining the Significant Water Management Issues for the third River Basin Management Plan for Ireland for public consultation. To find out how you can contribute to this process, click on the link below. The consultation period ends at 5pm on Friday, 7th August 2020. 

Protecting Water from Pollution by Oil Storage Tanks

Mayo County Council encourages householders to maintain their domestic oil storage tanks in good condition in order to prevent damage to propertyand to prevent environmental pollution. For more information please click here.

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