Miljögifter i svenska sjöar
Overview
An interactive web map visualizing the presence of environmental toxins in Swedish lakes. The map makes it easy to see which lakes are affected by substances such as PFAS, mercury (kvicksilver), PCB, and cadmium — and to what degree. Designed for use by the general public, journalists, and decision-makers.
Study Area: Sweden (national lake dataset)
Role: Solo project
Status: Live
Repository: github.com/ulfboge/miljogifter-500
Features
- Clickable lake markers — popup with lake name, county, contamination level, measured substances, and latest sampling date
- Color-coded contamination levels — green (low) / yellow (moderate) / red (high)
- Substance filter — select one or more substances (PFAS, Hg, PCB, Cd) with AND logic
Methods & Tools
Data Sources
- Swedish environmental monitoring data — lake toxin measurements (PFAS, Hg, PCB, Cd)
- SLU/SMHI lake coordinate data
Tools Used
| Tool | Purpose |
|---|---|
| Leaflet.js | Interactive map |
| JavaScript | Filter logic, popup rendering |
| HTML / CSS | Layout and styling |
| Python | Data preparation and GeoJSON export |