Media Queries
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Every fifteen minutes, the Environment Agency measures the rain. Every few minutes, the water companies say which of their CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s are discharging. Put the two on the same map and move through time, and the relationship is not subtle.
The interesting days are not only the wettest ones. Sometimes it barely rains and the sewers give way anyway. Sometimes it does not rain at all.
Explore the whole country Live data for Stone, Great Wyrley and Penkridge
Each blue square is the rain measured across a patch of the country in that quarter of an hour; each dot is a storm overflow that was discharging at that moment, coloured by company and growing the longer it has been running.
Two different counts, and they are meant to differ. Most discharges are short — under two hours on an average day — so far more overflows run at some point in a day than are ever running together. On , were discharging in the same quarter of an hour at the worst point, but different overflows ran at some point during it. The map, the cards and the day buttons all show the first, so they agree with the dots you can count; “spilled today” is the second. Unlike the annual pages, which count only discharges lasting more than half an hour, this page counts every one.
Every event the detector has found in Stone, Great Wyrley and Penkridge: days when no rain fell anywhere in the constituency, and its overflows discharged regardless. Pick one and watch it happen.
The square is how much it rained; the drop is how much sewage followed.
Sewage data begins in December 2024; rainfall goes back to December 2022. Days before the sewage record starts show rain only.
EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water
Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API
Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.
Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.
This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.
This project is not associated, approved or endorsed by any of the companies whose logos you see here.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org