Open, reproducible datasets on the Arbor Hills Landfill in Salem Township, Washtenaw County, Michigan. Each one is built from public regulatory records and published with its source files and the scripts that produced it, so any figure can be checked back to where it came from. All free to download.
Every EGLE-filed wellhead reading — temperature, methane, oxygen, carbon monoxide, and gas ratios — well by well, with source PDFs and build scripts.
2021–2026 · CSV · operator EGLE filings (SRN N2688)
The operator's own per-well wellhead hydrogen-sulfide readings from its 2026 annual survey, all 506 wells, with the source PDF and a reproducible parser.
2026 · CSV · operator annual survey (SRN N2688)
Fence-line methane and hydrogen-sulfide readings from the six-station perimeter network, with a raw snapshot bundled for offline reproducibility.
May 2022–Sept 2026 · CSV · GFL public perimeter feed (Barr Engineering)
A smaller, curated subset of the wellfield dataset — the elevated-temperature reading history for the flagged wells.
Curated subset · CSV · operator EGLE filings (SRN N2688)