← Datasets · Arbor Hills Monitor
The operator's own per-well wellhead hydrogen-sulfide readings from its 2026 annual survey at the Arbor Hills Landfill — all 506 wells — published with the source PDF and a reproducible parser.
This is the reading-level record behind the monitor's hydrogen sulfide page. In the surveyed gas, 261 of the 506 wells were at or above 76 ppm and 91 were at or above 500 ppm, with the strongest source at a leachate sump. These are in-gas source-strength readings measured inside the wells — a confined-space hazard, not resident exposure. Every value can be checked back to the operator's filed survey.
| Subject | Arbor Hills Landfill, Salem Township, Washtenaw County, Michigan (SRN N2688) |
|---|---|
| What it covers | Per-well wellhead hydrogen-sulfide (H2S) concentration in the extracted gas, all 506 wells in the 2026 annual survey |
| Time span | 2026 (annual survey) |
| Source | The operator's own annual wellhead H2S survey filed with Michigan EGLE (public regulatory record); source PDF bundled in the release |
| Format | CSV, with a reproducible parser |
| License / cost | Free to download; underlying data is public regulatory record |