The Single Unit Impact Assessment application is a referral application following the Pre-Development Enquiry process and needs to be submitted as soon as is practicable and prior to any formal planning submission.

Please complete all sections, in order to avoid delay or return of your application.

NI Water provides an Impact Assessment service to assist you in identifying any possible constraints that may be associated with servicing your proposed site in terms of water and wastewater infrastructure. The Impact Assessment can assist you in understanding the potential costs and timescales involved in servicing a site prior to land acquisition or in advance of the submission of a planning application.

You should only submit a Single Unit Impact Assessment where you have been advised by NI Water through a single unit PDE application response.

Should you wish to take advantage of this service, please complete the Single Unit Impact Assessment application form (SU-IA) and forward with the appropriate fee to the address below.

On receipt of the fixed fee, NI Water will produce a site specific report detailing potential mitigation measure you can undertake to overcome identified capacity constraints to permit you to connect to our infrastructure in areas where capacity is Limited.

The Impact Assessment process does not guarantee the applicant connection to the NI Water/Wastewater network, nor can NI Water commit to specific construction timeframes

• Foul:
  • Clearly mark proposed connection points on Site Layout Plan.
  • As per Sewers for Adoption NI 1st Edition (Section 2.5); the proposed design flows for gravity foul sewers for residential developments should be 4,000 litres/unit dwelling/ per 24 hours. Applicant to demonstrate clearly on application form how proposed discharge rate has been calculated.
  • Clearly mark any existing connection points on Site Layout Plan indicating if they are foul only or combined and provide associated calculations.

Surface Water:

• Clearly mark proposed connection points (discharge location) on Site Layout Plan.
• For ‘full bore’ surface water design the applicant needs to demonstrate clearly how the proposed discharge rate has been calculated (i.e. impervious areas (Ha) and rainfall intensity (mm/hr)).
• Greenfield discharge/approval is governed by DfI Rivers. Applicant to demonstrate clearly on application form how the proposed discharge rate has been calculated and provide evidence of correspondence with DfI Rivers.

Please return completed form(s) and appropriate fees to:

Developer Services – Servicing Team
Northern Ireland Water
Ballykeel Office
188 Larne Road
Ballymena
Co Antrim BT42 3HA

Telephone: 03458 770 003
Email: developerservices[AT]niwater[DOT]com

For more information on how NI Water lawfully processes personal data please refer to our Privacy Notice: https://www.niwater.com/privacy/