Chalk Streams: Sewage Discharge

Debate between Clive Efford and Emma Hardy

Tuesday 8th October 2024 Westminster Hall

[Clive Efford (in the Chair)]

Order. I think that the debate will finish at 4.46 pm.

[Emma Hardy]

I had just taken an intervention from the hon. Member for Chichester (Jess Brown-Fuller), who talked about the excessive removal of water and the situation that she finds herself in with the water company. I agree that we need to look for a long-term solution.

When we abstract too much water, that increases the concentration of pollutants and the water temperature, and decreases oxygen levels, leading to increased silt and loss of habitat. As the hon. Member for Henley and Thame (Freddie van Mierlo) mentioned, the physical habitat of our chalk streams has also been altered. They have been modified by people over recent decades, limiting the naturally varied habitats that plants and animals rely on and exacerbating the negative impacts of abstraction and pollution. Taken together, along with the sewage incidents, these pressures are placing our chalk streams under increasing strain and environmental stress.

In the constituency of the hon. Member for Harpenden and Berkhamsted, where chalk streams including the River Lea and River Ver flow, these pressures are no different. That is why this Government are continuing to ensure the conservation of chalk streams. Under the Government’s water industry national environment programme, improvements have been agreed for three waste water treatment works in the Harpenden and Berkhamsted constituency. They include stricter phosphorus limits for the discharge of fully treated sewage effluent and improved waste water flow monitoring to ensure that the required volumes of sewage receive full treatment before any storm overflow can occur. The capacity of the Berkhamsted waste water treatment works to fully treat sewage has also been increased from 247 litres to 316 litres per second, providing for a higher and larger quality of treated effluent.

The Environment Agency is investigating the cause of a prolonged storm discharge from the Markyate sewage treatment works into the River Ver. Unfortunately, as it is a live investigation, I cannot go into more detail now, but I greatly encourage the hon. Member for Harpenden and Berkhamsted to speak to the director of the Environment Agency about that and, of course, when the investigation is concluded, we can have a more detailed conversation about the issue and about what enforcement action can be taken.

I should also note that the Environment Agency has been working with Affinity Water and local partners to revitalise chalk rivers by leaving more water in the environment, addressing the issue of over-abstraction of our chalk rivers, and improving the physical habitat and water flow. Water abstractions across the catchment have been reduced by 33.3 megalitres per day, with a further reduction of 23.5 megalitres per day to be delivered by spring 2025. This is ongoing work in progress to address over-abstraction from chalk streams, which we rightly recognise is a concern.

--- Later in debate ---

[Clive Efford (in the Chair)]

Order. Interventions have to be short; this is a half-hour debate.

[Emma Hardy]

I will go on to talk about agriculture and some of those other issues.

To turn to sewage, which I know is on the minds of many people, we have undoubtedly inherited a deeply flawed system and one that is now discharging record levels of sewage into our lakes and streams, and into our chalk streams. This is a public health crisis, demanding our immediate and decisive action to rectify decades of neglect and mismanagement.

We have committed to a rapid review of the environment improvement plan, to be completed by the end of the year, which will set out how DEFRA will deliver the Government’s legally binding targets. The Government will develop a new statutory plan to protect and restore our natural environment, with delivery plans to meet each of our ambitious targets under the Environment Act 2021, including cleaning up our waterways.

This Government require water companies to publish sewage discharge monitoring data online in near real time and in an accessible format. The Environment Agency independently monitors and scrutinises all the data submitted by water companies as part of its requirements for the monitoring of sewage outlets.

All that activity must be seen in the wider context of the actions that this Government are taking to demonstrate our commitment to prioritising the clean-up of all our waterways. In the first weeks of this Labour Government, the Secretary of State met water companies to make it clear to them that under this Government they will be answerable for their performance for customers and the environment. We have secured an agreement from all companies to amend their articles of association, which are the governing rules of each entity, placing customers and the environment at the heart of their objectives, thereby reinforcing the inherent social and moral responsibilities that come with operating a public utility.

The Secretary of State has also written to Ofwat, securing agreement that vital funding for infrastructure is ring-fenced and can only be spent on upgrades that benefit customers and the environment. Ofwat will also ensure that when money for investment is not spent, companies will refund customers, with money never being allowed to be diverted for bonuses, dividends or salary increases.