Outside-air economization; evaporative only on peak days
Basis
Fitted to a published figure of 175 million gallons a year
Air — what the stacks emit
Nitrogen oxides423t/yr
Sulphur dioxide437t/yr
Fine particulates51.0t PM2.5
Health damages$50.0M/yr
Where it burns
WECC Rockies — Utah / Nevada
Generation mix
Gas 42 · Coal 34 · Solar 12 · Geo 5
CO₂e
673 kt/yr — climate, not air quality
Who wanted it
Who asked for it
Meta — self-build
Who approved it
Eagle Mountain City annexation and development agreement; Rocky Mountain Power supply plus a Meta-funded solar build
What it serves
Meta consumer app serving and storage
IT capacity
220 MW running of 450 MW announced
Sits in the Great Salt Lake basin, where the lake's decline is a live state emergency. Meta's design leans hard on dry cooling for exactly this reason — the site is a useful counterexample to the assumption that desert siting always means heavy water use.
Water and air figures are modelled from disclosed capacity, not measured — site-level
error is roughly ±40%. Diesel backup generators are not counted, so on-site figures are floors.
Full method.