Thanks. So, if I pick up on the EDM point, by quirks of history, geography, economics, we've got more CSOs in our operating area per 1,000 km of sewer than any other water company. So, that's a tricky starting point when we're looking at CSOs. Nonetheless, we embarked with our regulators on a programme slightly ahead of England, in terms of trying to get monitors on every one of those. This year, we'll be reporting on 99 per cent. Last year, it was 98 per cent; we're up to 99 per cent. The last few, actually, we've got some real tricky ones from a safety point of view that, actually, we might have to re-engineer them to be able to even get a monitor to them. But, we're at 99 per cent. And what we're trying to do with that data is use that to help us decide which are the ones we need to start targeting, and use, as James has said, from a water quality perspective. So, we have this process, I think it was mentioned by NRW, the SOAF process, where basically we go about doing environmental investigations around those CSOs, and we've got 400 of those under way at this moment in time, to try and look at water quality impact.
As James has said, the data from the river monitoring in Wales, water framework directive—the reasons for not achieving good status, waste water company operations, you know water company operations, in Wales account for about 20 per cent of the problems for not achieving 'good'. Just to give you some examples, I think it's about 27 per cent for agriculture, it's still about 15 per cent for the legacy from mining et cetera. The storm overflow piece, the CSO piece, is less than 10 per cent of the impact in that area.
We've been doing this sort of apportionment work on the River Wye. It's been touched on a few times and in our evidence. We're doing modelling work on the Usk, on the Dee, the Cleddau, the Teifi. We've got the data for the River Wye, and storm overflows are 2 per cent of the problem on the River Wye. Between 20 per cent in the upper reaches and nearly 30 per cent in the lower reaches of the Wye—it's sewage treatment works discharges. And we've got a programme there of spending £60 million on upgrading 11 treatment works on the River Wye to take even more phosphorus, even more nutrients out of there.
We're spending £110 million in this five-year period on some of those storm overflows. The ones that Janet raised—the ones that NRW have flagged there—that's that programme of tackling those worst CSOs, and we do it on the basis of, 'Do they spill a lot and have they got a big environmental impact?', and we'll go for the ones with the environmental impact because, just as James has said, we're all about trying to improve the kilometers of river in Wales. That's our goal and we are all striving to try and get that water company impact as absolutely low as we possibly can.