Water and Wastewater Impact Assessments
WATER GUIDANCE NOTES
The Water 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.
Failure to complete all sections will result in the return of your application. Please refer to our guidance details below before completing your application.
Northern Ireland Water provides a Water Impact Assessment service to assist developers in identifying any possible network reinforcements and/or constraints that may be associated with servicing a development site in terms of water infrastructure. The Impact Assessment, which involves hydraulic assessment or network modelling, can assist developers 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. The results of the Water Impact Assessment are for information only and should not be regarded as an approval or rejection of your proposals.
The Water Impact Assessment is a more in-depth service than a Pre-Development Enquiry. It aims to identify the most appropriate point of connection and the indicative hydraulic assessment for servicing the site (as recommended in Pre Development Enquiry response).
Should you wish to take advantage of this service, please fully complete the Water Impact Assessment application form (W-IA)and forward with the appropriate fee to the address below.
NI Water will endeavour to provide you with the recommendations from the Water Impact Assessment report within 65 working days of receipt of a complete application. If NI Water are unable to do this you will be contacted and given the reason why with amended timeframe.
NI Water will inform the developer if there is insufficient capacity within the water network to accept the new development, advise on what reinforcement of the network is required (if applicable) and next steps. (Where a developer is advised to submit an external watermain requisition application they will be advised of costs and any required contribution as part of conditional response.)
WATER SUPPLY REQUIREMENTS
- It is important in the application that the applicant ensures that the Peak Flow Rate (l/s) and average ‘Continuous Flow Rate’ (l/s) requested are reflective and realistic.
- Please provide supporting calculations/information on how the Peak Flow Rate (l/s) and average ‘Continuous Flow Rate’ (l/s) have been arrived at.
WASTEWATER GUIDANCE NOTES
The Wastewater 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.
Failure to complete all sections will result in the return of your application. Please refer to our guidance details below before completing your application.
NI Water provides a Wastewater Impact Assessment service to assist developers in identifying any possible constraints that may be associated with servicing a development site in terms of wastewater infrastructure. The Impact Assessment can assist developers 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.
Should you wish to take advantage of this service, please complete the Wastewater Impact Assessment application form (WW-IA)and forward with the appropriate fee to the address below.
On receipt of the fixed fee, NI Water will produce a site specific development solution engineers report detailing potential developer funded solutions to overcome Wastewater capacity constraints and help facilitate new development in areas where capacity is limited.
An indicative construction cost of solutions, such as off-site infrastructure or network upgrading, will be provided.
NI Water will endeavour to provide you with a development solution engineers report within 65 working days of receipt of a complete application.
The Wastewater Impact Assessment process does not guarantee the applicant connection to the NI Water Wastewater network, nor can NI Water commit to specific construction timeframes.
WASTEWATER DETAILS
- 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.
Returning completed forms
Please return completed form(s) and appropriate fees to:
Developer Services - Servicing Team
Northern Ireland Water
Ballykeel Office
188 Larne Road
Ballykeel, 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/
