While water use is not a material issue for us as we are not a significant user of water, we do monitor and track usage. We have substantially reduced our water usage since 2013, as a result of improved performance, upgrading of offices and importing less gas from the UK due to the increase in gas supplied from Corrib. This has resulted in less usage of our UK turbine fleet and less water being consumed.
With supplies of gas from the Corrib field in decline and an increased reliance on our interconnector pipelines and compressor stations in Scotland, our water consumption increased from 2018 to 2019, a decrease was realised in 2020 due to reduced office occupancy during COVID-19.
We monitor and report water consumption based on utility meters and reconcile this, where possible, with sub metering data. We report water consumption by supply and treatment of both volume and carbon equivalent using Department of Environment, Food and Rural Affairs (DEFRA) conversion factors. From 2021 on, we will utilise internally sourced emission factors for both supply and treatment of water. We do not consume water from areas of water stress.
In 2020 we used 20,121,000 litres of water. Our water consumption fell to 6.39 TCO2e in 2020 due to COVID-19 with most of our staff working from home.
Our annual water consumption in TCO2e is shown below:
Annual water consumption in TCO2e