Amazon Web Services · Salem Township, Pennsylvania
Water — consumed, not returned
Taken from the basin1,865M gal/yr
Evaporated on site168M gal
Making the power1,697M gal
Basin stressLow
Where the water comes from
Surface water — river, lake or canal
Cooling
Closed-loop with river-water heat rejection
Basis
Modelled from cooling design — WUE 0.25 L/kWh
Air — what the stacks emit
Nitrogen oxides5.14t/yr
Sulphur dioxide2.57t/yr
Fine particulates1.03t PM2.5
Health damages$0.65M/yr
Where it burns
Dedicated nuclear (co-located PPA)
Generation mix
Nuclear ~100%
CO₂e
30.8 kt/yr — climate, not air quality
Who wanted it
Who asked for it
AWS — bought the campus from Talen Energy for $650M
Who approved it
FERC initially rejected the amended interconnection agreement in Nov 2024 over cost-shifting to other ratepayers; a restructured deal followed in 2025
What it serves
AWS compute co-located with a nuclear plant
IT capacity
300 MW running of 960 MW announced
The test case for 'behind-the-meter' co-location: plugging a data center straight into a nuclear plant bypasses the grid, and FERC balked because everyone else still pays for the transmission system it stops using.
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.