My Lords, at an earlier stage of the Bill, I made the case, with others, for amending Clause 158, which concerns the statutory requirement for water companies to upgrade sewage plants to meet new nutrient standards in the areas worst affected by pollution. We welcomed this, but although it was seen as a good step forwards for improving water quality, frustratingly, it specified only that such upgrades should take place at the sewage disposal works themselves, usually meaning traditional engineering systems and solutions, which in themselves
relied on concrete materials. Amendment 247, tabled in my name and with the support of the noble Baronesses, Lady Parminter and Lady Jones of Whitchurch, was therefore designed to enable effective use of restored habitats, known in this context as nature-based solutions, by water companies to also meet those standards.
As we pointed out in Committee, those nature-based alternatives can be a really effective and very cheap approach to soaking up nutrient loads and reducing the pollution reaching rivers, as well as providing excellent habitats for biodiversity. Our amendment also had strong support from water companies and Ofwat, but in Committee, the Government’s argument against it was the suggestion that it could somehow let water companies off the hook by allowing them to use such nature-based measures to fudge the delivery of their upgrades. We have therefore brought back this tweaked amendment, in which we have added an explicit requirement for water companies to secure agreement for compliance and investment plans from Ofwat and the Environment Agency before commencing their updates—so we are putting a fail safe in there. We have also included in the amendment the ability for the Environment Agency to impose monetary penalties on water companies for failing to deliver on the compliance and investment plans.
Over the summer, concessions in this area were tabled by the Government, which I really welcome. Those amendments are really positive in principle. However—this is a very big “however”—I fear that Amendment 247 may become very insignificant for the environment if the other government amendments recently introduced into this group are passed. I will therefore briefly speak to those as well. As I am a scientist, I will address the amendments from a scientific perspective rather than addressing their constitutional and legal aspects. In particular, I want to focus on Amendment 247YYA, which amends the habitats regulations to remove controls on nutrient loads in rivers for those that are associated with housing developments.
The amendments are based on the premise that the extra nutrient loading in areas where the relevant houses will be built will be less than 1% of the loading of the existing housing stock. This is where a key piece of evidence is missing: what is the loading of the existing housing stock? The Home Builders Federation would like us to believe that houses contribute 5% of excess nutrient loads in rivers in England compared with 50% from agricultural activities, so it is all the problem of farmers and not of housebuilders.
I quote from the Home Builders Federation:
“It is estimated that all existing development, including residential, commercial and the rest of the built environment, contributes less than 5% towards the phosphate and nitrate loads in our rivers—meaning the occupants of any new homes built would make a negligible difference”.
But the evidence base is, very strangely, lacking: where does that 5% come from? Searching for it leads me to believe that the figure has been extrapolated from a 2014 Defra report, The Impact of Agriculture on the Water Environment: summary of evidence, which was used to inform the 25-year environment plan. The first thing to note is that this report has since been updated by Defra, and the most recent statistics stand as follows:
“Agriculture is the dominant source of nitrate in water (about 70% of total inputs), with sewage effluent a secondary contributor (25-30%)”—
not 5%.
I also looked at other data that could support this level of 5% from the built environment, so I did a search of academic studies that had been published in the peer-reviewed literature in the past three years in similar climatic regions across the world to look at the percentage source of pollution in river catchments that contain a mix of agriculture and urban development. I could not find a single example that suggested a value as low as 5% of the nutrients in rivers coming from housing. One found that, in a large catchment containing seven rivers, 14% of nutrients were from wastewater from residential buildings; in another, it was 33%, and 28% in another. All were significantly higher than the 5% that we have been told is the likely impact. For the UK, a recent assessment by Greenshank Environmental also indicates a far higher nutrient load in rivers from housing, closer to 36%. I therefore urge other noble Lords not to take this 5% figure too seriously.
Worse than this, if Amendment 247YYA goes through, we will never know the true value, since the amendment instructs planning authorities to assume no increase in pollution, prevents them requesting an assessment to investigate pollution further and even goes as far as to instruct authorities to ignore any evidence of potential adverse impacts; for example, as provided by scientific studies or even NGOs. It simply cannot be acceptable to amend one of our key environmental protections like this.
These amendments also fly in the face of the environment statement on the Bill, which says:
“The Bill will not have the effect of reducing the level of environmental protection provided for by any existing environmental law”.
That does not seem to be the case. The Government’s own adviser, and the chair of the Office for Environmental Protection, made this point in a letter to the Government last week.
In conclusion, I will not be supporting these later government amendments. I urge other noble Lords to do the same, not least because in this country we are already dealing with extremely polluted rivers. In February this year, the Environment Agency reported that only 14% of our rivers are classified as being in a good ecological status. It also stated that, without new interventions, this figure will drop to just 6% by 2027. I beg to move.