In 2023 I built a small app to explore the data of the Forever Pollution Project, a cross-border investigation into PFAS, the synthetic “forever chemicals”. In 2026 I rebuilt it as PFAS Atlas, on a much larger dataset that is now maintained by the PFAS Data Hub, run by CNRS Humanities & Social Sciences. Both versions are described on their own pages.
PFAS Atlas (2026)
Around 1.3 million samples from 33 countries (as of October 2026), with a profile for each place and a check of drinking water samples against the EU limit. The page explains where the data comes from now, how I built the app together with Claude Code, and what the data can’t tell.
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Forever Pollution Project app (2023)
My first, small Shiny app on the journalists’ expert dataset of about 44,600 rows. It shows the sites on a map, with filters by contamination category, country, site and sample type, a city search, and all details for a single site in a tooltip.
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