top of page
Ampney Brook upstream before pipe_edited

Data analysis of the highest standard

WASP's data analysis, conducted by Professor Peter Hammond, was reported in the 2022 Environmental Audit Committee Report into River Pollution, where it was deemed to be superior to that of the regulators.

A man sitting in conversation with camera equipment in the foreground

Prof Peter Hammond on BBC Panorama with Joe Crowley

Peter Hammond is a retired university academic and campaigner for sewage-free rivers. He was Professor of Computational Biology at UCL’s Institute of Child Health until his retirement in 2015, where he used artificial intelligence and image analysis to detect brain and facial shape differences associated with genetic disorders and prenatal alcohol exposure.

 

From 2015 to 2018, Peter Hammond continued part-time research at the University of Oxford’s Big Data Institute. Since 2016, he has campaigned for sewage-free rivers and seas with WASP (Windrush Against Sewage Pollution), working closely with founder Ash Smith to expose pollution and push for regulatory action.

Cassington.jpg

We use Environmental Information Regulation requests to gain access to industry data.

 

The data we use is provided by the Environment Agency, Ofwat, and water companies.

Anchor 1
Anchor 2
A waste water treatment works

Did you know... Sewage can be legally discharged into rivers

Excess sewage discharges can be permitted in "exceptional circumstances", such as "unusually heavy rainfall".

 

But even then, it must be treated to certain standards.

 

Water companies routinely break the law in this respect but are seldom prosecuted.

Anchor 3
Foam floating on a river

The Environment Agency has missed the majority of 
illegal discharges.

Our analysis shows that many unpermitted spills go undetected by the Environment Agency.

 

This is partially because they only request daily data from water companies.

 

We use data recorded at 15-minute intervals. 

Meanwhile, water companies keep the money flowing out as dividends and interest payments on loans they did not need.

A group of protesters outside Thames Water offices holding a blue banner

Compelling evidence shows how privatisation is the root cause of the industry's failure to deliver for anyone but owners, creditors, and bosses.

Anchor 5

Sewage spills last for months

The brown block shows when untreated sewage was spilled.

It's happening for weeks and months on end.

This is not an exceptional example.

A screenshot showing a brown bar when sewage was discharging

Screenshot sewagemap.co.uk

Anchor 7

This has a devastating effect on our waters

Only about 14% of English rivers are in good ecological status.

​

In the Thames region it may be as low as 6% and we know that in many cases the assessments of the Environment Agency appear unrealistically optimistic. 

​

People may argue over the causes, but unchecked pollution is always going to do damage and it has become the water industry norm.

Anchor 8

It's already too late for some of our wildlife

Every spring, wildlife tries to bounce back from a winter of pollution.
​
But eventually it will be unable to recover.
​
We may have already lost the rare filter feeders, called Crystal Moss Animals, which once lived in Chil Brook.

Bryozoan Lophopus - a small colony - copyright micrographia.com

A small colony of Bryozoan Lophopus, also known as Crystal Moss Animal
© www.micrographia.com

Anchor 9

Discover our reports & references

Sign up for news

Thank you! Your sign up was successful.
You will now receive WASP updates by email.

  • Instagram
  • Twitter
  • Facebook
  • YouTube

©2026 Windrush Against Sewage Pollution

Registered Charity Number 1199418

bottom of page