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Switch site 38 sites · 11 basins 8 open

Each site is one Watermark investigation. The page color says what opens; the campus line is the build on the ground — two different clocks.

MAU Maumee Basin 9 sites
2MI The Two Miamis 9 sites
SE Southeastern Basins 12 sites
NE Northeast Basins 8 sites
The page — what opens on Watermark Open · Draftfull record Queued · Watchingpreview page Restrictedrequest access
The campus — the build on the ground Investigating Confirmed Under construction Operational
All 38 sites — the network index →

Toxics & air permits

Emissions and discharge permits, read against modeled exposure.

Data sources Ohio EPA eSuiteEPA ECHOEPA RSEI

Permits are the ceiling

A permit's allowable emissions is a legal ceiling, not a measurement of what a facility actually emits — the record always distinguishes the two.

Scores lag reality

RSEI and discharge-monitoring data is typically months old at publication; the record dates every figure so a reader knows how current it is.

Exposure is modeled, and said to be

Any dispersion or exposure estimate is clearly labeled as a model, built from public permit limits, not a direct health finding.

A permitted emissions ceiling read from the air permit is [verified] ; the modeled ground-level increase from a standard dispersion run is [inference] .

Guardrail

A modeled exposure estimate is never published as a health finding.