← Datasets · Arbor Hills Monitor
Fence-line methane and hydrogen-sulfide readings from the six-station perimeter network (MS-1 through MS-6) around the Arbor Hills Landfill, May 2022 to September 2026. Published with a raw snapshot so the enriched table can be rebuilt and checked offline.
This is the ambient, at-the-boundary record behind the monitor's hydrogen sulfide page — the concentrations that actually reach the property line, in parts per billion, as distinct from the far stronger in-gas readings inside the wells. A data-quality note: since mid-2025 two of the six stations (MS-2 and MS-5) have reported a flat 0.0 ppb of hydrogen sulfide while their methane sensors keep varying, which points to a non-responsive sensor rather than clean air; the dataset carries the raw values so this is visible.
| Subject | Arbor Hills Landfill perimeter, Salem Township, Washtenaw County, Michigan (SRN N2688) |
|---|---|
| What it covers | Fence-line hydrogen sulfide (ppb) and methane readings from the six perimeter stations (MS-1–MS-6) |
| Time span | May 2022 to September 2026 |
| Source | GFL's public perimeter-air feed, operated by Barr Engineering; a raw snapshot is bundled so the enriched table is byte-checkable against the source |
| Format | CSV, with a raw snapshot and build script |
| License / cost | Free to download; underlying data is a public monitoring feed |