New Clause 13 - Guidance on poly- and perfluorinated alkyl substances

Water (Special Measures) Bill [Lords] – in a Public Bill Committee at 3:15 pm on 14 January 2025.

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“After section 86ZA of the Water Industry Act 1991, insert—

(1) The Secretary of State must by regulations made by statutory instrument make provision for the regulation of poly- and perfluorinated alkyl substances in drinking water based on guidance issued by the Drinking Water Inspectorate.

(2) Until the Secretary of State makes provision for the regulation of poly- and perfluorinated alkyl substances, water and sewerage companies must implement any relevant guidance issued by the Drinking Water Inspectorate.

(3) A statutory instrument containing regulations under this section may not be made unless a draft of the instrument has been laid before, and approved by a resolution of, each House of Parliament.’”—(

This new clause would require the Secretary of State to make regulations relating to the presence of poly- and perfluorinated alkyl substances in drinking water based on guidance issued by the Drinking Water Inspectorate, and require water companies to follow the Inspectorate’s guidance in the interim.

Brought up, and read the First time.

Photo of Tim Farron Tim Farron Liberal Democrat Spokesperson (Environment, Food and Rural Affairs), Liberal Democrat Lords Spokesperson (Communities and Local Government)

I beg to move, That the clause be read a Second time.

New clauses 13 and 14 are connected, so with the Chair’s permission, I might speak to both of them.

Photo of Tim Farron Tim Farron Liberal Democrat Spokesperson (Environment, Food and Rural Affairs), Liberal Democrat Lords Spokesperson (Communities and Local Government)

Thank you—I do not want to detain the Committee any longer than I need to. The new clauses are about a vexing and serious issue: the presence of polyfluorinated and perfluorinated alkyl substances in our waterways and in our drinking water, in particular. I pay tribute to my hon. Friend Munira Wilson for championing this issue in this place and outside it.

The new clause attempts to raise the existing guidance from the Drinking Water Inspectorate on PFAS levels in drinking water to a statutory level; that is the key point. The Bill seeks to increase regulatory power over water companies, and the new clause will increase the Drinking Water Inspectorate’s power to enforce the guidance regarding PFAS. There is currently no legal limit on the amount of PFAS present in our drinking water. There is only guidance, even though the Environment Agency and the Health and Safety Executive have both recommended that there should be a legal limit.

New clause 13 would require water companies to prioritise and take a proactive stance on limiting PFAS in drinking water. Currently, if a water company were to breach PFAS guidance, its regulatory compliance score would not be affected as it would if, for example, lead was found in its water. This would encourage them to invest in treating water to remove PFAS. This is an important first step in prompting the Government to create a fully-fledged chemical strategy to deal with chemical pollutions of all kinds, starting with the most direct threat to human health, which is the direct consumption of PFAS through drinking water. PFAS are toxic, they are forever and they are very pervasive. Links have been found between PFAS chemicals and a host of health issues, such as, but not limited to, cancer, thyroid disease, fertility issues, lowered birth weight, weakened bones in children and immune resistance to vaccinations.

New clause 14 would put the duty on the water companies to take responsibility for the reduction and prevention of PFAS chemicals in water systems, ensuring that each water company is responsible.

Photo of Emma Hardy Emma Hardy The Parliamentary Under-Secretary of State for Environment, Food and Rural Affairs

I thank the hon. Member for proposing new clauses 13 and 14 on this incredibly important issue, and for highlighting the importance of PFAS monitoring. I want to reassure everybody that the quality of drinking water in England is exceptionally high and among the best in the world. It is important to me that it remains that way.

Across Government, we are working to assess PFAS levels occurring in the environment, as well as their sources and potential risks, to inform future policy and regulatory approaches, safeguard the current high drinking water quality and ensure our regulations remain fit for purpose. Water companies have a statutory obligation under the Water Supply (Water Quality) Regulations 2016 to carry out risk assessments to identify anything that could pose a risk to health or cause the water supplier to be unwholesome. That includes the risk of PFAS.

I will explain which PFAS are tested for in drinking water. The Drinking Water Inspectorate issued a series of information letters to water companies to set out a risk-assessment methodology and associated monitoring strategies for up to 48 individual PFAS compounds. The guideline values of PFOS, or perfluorooctane sulfonic acid, and PFOA, or perfluorooctanoic acid, are agreed with the UK Health Security Agency, and have been applied to 48 individual PFAS. The DWI guidance will be reviewed and updated where necessary.

The Drinking Water Inspectorate has provided guidance on PFAS to water companies since 2007 and, as I explained, that is regularly updated as new research emerges. In July 2024, DEFRA announced a rapid review of the environmental improvement plan to deliver on our legally binding targets to save nature. That includes how best to manage chemicals, including the risks posed by PFAS, and we are working closely with the DWI on all matters, including PFAS.

I reassure the hon. Member for Westmorland and Lonsdale that the Water Industry Act 1991 already provides the necessary powers to amend existing regulations to deal expressly with PFAS, should the Government wish to do so. I will have a meeting with his hon. Friend, Munira Wilson, on this issue. I hope that the hon. Gentleman is reassured that this new clause is not suitable for the Bill, so I ask him to withdraw it.

New clause 14 focuses on chemical contaminants entering our waterways. I agree with the hon. Member for Westmorland and Lonsdale about the importance of the issue, which is why, as I announced, we will have the rapid review of the environmental improvement plan to deliver on our targets to restore nature. That includes looking carefully at the risks posed by PFAS. The review will consider and set out effective measures to mitigate harmful chemical substances entering our water through the environment. Through the chemical investigations programme, we are working with the water industry to understand how levels of contaminants in treated waste water affect our water environment. The programme will provide valuable information to understand the effectiveness of different measures to tackle chemical contamination of our rivers.

Significant costs are associated with end-of-pipe technologies at sewage treatment works to manage the more challenging chemicals, such as PFAS. We therefore need to prevent contaminants entering the water system in the first place, before they get to the waste water treatment works, where the cost for treatment will be unfairly borne by water customers, rather than the polluters. Work continues across Government to help us to assess the levels of PFAS occurring in the environment, their sources and the potential risks, so that those can inform future policy and regulatory approaches to safeguard our high drinking water quality and to ensure that regulations remain fit for purpose.

The DWI expects water companies to plan to reduce PFAS concentrations in treated water progressively by implementing a reactive and systematic risk-reduction strategy. That is why we need to need to prevent them entering the water in the first place. I hope that the hon. Member is reassured by the actions that we are taking and will not press new clause 14.

Photo of Tim Farron Tim Farron Liberal Democrat Spokesperson (Environment, Food and Rural Affairs), Liberal Democrat Lords Spokesperson (Communities and Local Government)

I am substantially reassured that the Minister is taking this issue seriously, and I am grateful that she is to meet my hon. Friend the Member for Twickenham, who has championed it so well. All the same, while I do not agree, I accept the Minister’s point about the way in which we are doing this—which, I guess, is contained in new clause 14, so I will not press that to a vote—but new clause 13 simply says what the Health and Safety Executive and the Environment Agency are already saying, which is that those chemicals are deeply dangerous and that the restrictions on them should therefore be moved from guidance to a statutory level. That ought to be a no-brainer, so we will press that new clause to a vote.

Question put, That the clause be read a Second time.

Division number 15 Water (Special Measures) Bill [Lords] — New Clause 13 - Guidance on poly- and perfluorinated alkyl substances

Aye: 3 MPs

No: 11 MPs

Aye: A-Z by last name

No: A-Z by last name

The Committee divided: Ayes 3, Noes 11.

Question accordingly negatived.