Routine maintenance at Hatfield Reservoir

Maintenance works at Hatfield Reservoir

We’ll be carrying out a routine inspection and clean of the facility which extends the lifespan of the Reservoir. This essential work helps us to continue supplying high-quality, reliable drinking water to you and your local community long into the future. These works also help us to proactively maintain water quality, protect the structure of the reservoir and meet our regulatory requirements.

What we are doing

We inspect our reservoirs every few years, to check their structure and carry out any improvements necessary to extend their lifespan. This involves draining the reservoir, cleaning it thoroughly and testing the water quality before returning it to service.

When we’ll be working

Dates: This work will start on Monday 20th October 2025 and will continue for approximately 2–3 months.

We will be updating this page as we progress through the inspection.

How will this affect you?

You may notice slightly lower water pressure while the reservoir works are being carried out. Don’t worry, your water supply will continue as normal, and we'll do everything we can to keep any impact to a minimum.

If you rely on water for medical reasons, please let us know or sign up to our Priority Services Register.

Thanks for your patience while we carry out this important work. If you’d like more information, get in touch with us and quote the project code: P023547.