My Lords, I declare my environmental interests as in the register. I support the noble Lord, Lord Cameron of Dillington, and his Amendment 163A, which encourages sewerage under-takers to consider nature-based solutions for wastewater treatment.
We have new and emerging threats in trying to treat wastewater. We have microplastics and increasing levels of hormones and other pharmaceuticals, as well as an
increasing range of chemicals flushed down toilets to clean them. These are called contaminants of emerging concern—CECs—and the traditional approach would be to use different and even stronger chemicals to neutralise them, although I am not sure how one can neutralise microplastics. This is where nature-based solutions can play a big part. We all know that nature-based solutions near and on rivers can reduce flooding, cut down on nutrients getting into rivers and the sea and improve biodiversity. They can do the same thing before treated water even gets to the rivers.
In the next group is the new clause from my noble friend the Minister on stormwater overflows, which is long overdue. We must stop ordinary rainwater from entering the sewerage system and adding millions of gallons of clean water to wastewater, making the whole lot in need of treatment. In addition, we need a campaign to educate householders not to pour gallons of poisonous cleaners down the loo. I think we are still trapped—well, some older noble Lords might remember this—in the old Harpic advert of the 1980s, with its slogan of it being essential to clean “right round the bend”. It was a great slogan that has encouraged millions of us to use unnecessarily powerful chemicals to tackle a non-existent problem of cleaning sewerage pipes and not just the toilet itself.
In addition to reducing the amount of water which becomes wastewater in need of treatment and reducing the poisons we add to it, we need sewage treatment works to adopt, where possible, alternatives to chemical treatment. The main alternative has to be reed beds, which work exceptionally well and do a perfect job. Of course, reed beds and treatment require space and they are not the solution for many urban areas but they can be a much greater solution than they are now. Amendment 163A merely states that a sewerage undertaker in its management plan must address
“the opportunities for nature based solutions”.
As I read it, there is no compulsion, no fixed targets; it merely asks them to look at the opportunities to do it. In my opinion, that does not impose an unreasonable burden on them and I urge my noble friend the Minister to accept it, or accept the concept, anyway.