Under the Freedom of Information Act 2000 (FOI) and the Environmental Information Regulations 2004 (EIR), public authorities, including Northern Ireland Water (NI Water) are obliged to make information available to the public. This includes information placed in the public domain in response to a request for information under the Freedom of Information Act and the Environmental Information Regulations.
This disclosure log lists NI Water’s responses to notable information access requests, both Freedom of Information (FOI) requests and primarily Environmental Information Regulation (EIR) requests, since April 2024.
We don’t publish personal information as this is exempt from release under the UK General Data Protection Regulation (UK GDPR) and Data Protection Act 2018.
We aim to review and refresh the disclosure log every few months.
You can see the responses to the requests for information by clicking the links in the ‘Request & Response’ column.
If you cannot find a specific request that you are looking for, please do not hesitate to contact NI Water Information Management Unit and we will do our best to make available all the information that the legislation allows the Company to disclose.
Further information
Guide to freedom of information | ICO
Guide to the Environmental Information Regulations | ICO
NI Water response times to information requests (five years data)
Filter Response By:
Asulam monitoring in the drinking water supply serving Tandragee from 1 January 2015 to 3 October 2026, including analytical results, monitoring decisions and any investigation records.
Clarification of the availability and meaning of modelled annual storm overflow spill volumes within the Lough Neagh catchment, and whether an estimate is held for all 726 identified storm overflows.
Clarification of the availability and meaning of modelled annual storm overflow spill volumes within the Lough Neagh catchment, and whether an estimate is held for all 726 identified storm overflows.
…Costs incurred and anticipated in addressing blue-green algae, pondweed and aquatic plant growth at drinking water treatment works.
Costs incurred and anticipated in addressing blue-green algae, pondweed and aquatic plant growth at drinking water treatment works.
Larne wastewater catchment capacity, development commitments, planning consultation responses, hydraulic modelling and environmental risk.
Larne wastewater catchment capacity, development commitments, planning consultation responses, hydraulic modelling and environmental risk.
The locations of drinking water reservoirs across Northern Ireland, records demonstrating each reservoir level since 1 November 2025, and confirmation of whether NI Water provides water to, or receives water from, Irish Water.
Requested information on the costs associated with abstracting and treating drinking water at NI Water treatment works supplied by Lough Neagh or the River Bann, together with comparative costs for other water treatment works in Northern Ireland.
Requested information on the costs associated with abstracting and treating drinking water at NI Water treatment works supplied by Lough Neagh or the River Bann, together with comparative costs for…
Requesting information about the amount of drinking water and non-drinking water used by data centres in Northern Ireland, broken down by financial year since 2019.
Request for the current digital Water Supply Zone boundary dataset in its existing GIS format, including zone identifiers or codes and zone names where held.
Request for the current digital Water Supply Zone boundary dataset in its existing GIS format, including zone identifiers or codes and zone names where held.
Requesting information about electricity consumption associated with Northern Ireland Water’s water supply and wastewater operations.
Requesting information about electricity consumption associated with Northern Ireland Water’s water supply and wastewater operations.
Request for details of all agency communications and correspondence in relation to the contemplation or proposed application of civil contingencies legislation in relation to Lough Neagh and drinking water supply in Northern Ireland since 2023.
Request for details of all agency communications and correspondence (both electronic and physical, internal and external) in relation to the contemplation or proposed application of civil contingencies legislation in relation…
Requested correspondence, documents and reports held by Northern Ireland Water relating to data centres between 1 September 2025 and 20 July 2026.
Requested correspondence, documents and reports held by Northern Ireland Water relating to data centres between 1 September 2025 and 20 July 2026.