Water Ledger

A free public tool · public data only

What Would a Data Center Use?

Choose your city, township or county, the size of the campus and how it is cooled. Water Ledger estimates the water it would take, use up and send out as wastewater on an average day and a hot peak day, and sets that next to your local water system, sewer plant, streams and electric utility.

Choose your state

Colored states have a calculator. Click one to start.

Alaska: not covered yetAlabama: not covered yetArkansas: not covered yetArizona: not covered yetCalifornia: not covered yetColorado: not covered yetConnecticut: not covered yetDistrict of Columbia: not covered yetDelaware: not covered yetFlorida: not covered yetGeorgia: not covered yetHawaii: not covered yetIowa: not covered yetIdaho: not covered yetIllinois: not covered yetIndiana: not covered yetKansas: not covered yetKentucky: not covered yetLouisiana: not covered yetMassachusetts: not covered yetMaryland: not covered yetMaine: not covered yetMichiganMIMinnesota: not covered yetMissouri: not covered yetMississippi: not covered yetMontana: not covered yetNorth Carolina: not covered yetNorth Dakota: not covered yetNebraska: not covered yetNew Hampshire: not covered yetNew Jersey: not covered yetNew Mexico: not covered yetNevada: not covered yetNew York: not covered yetOhioOHOklahoma: not covered yetOregon: not covered yetPennsylvania: not covered yetRhode Island: not covered yetSouth Carolina: not covered yetSouth Dakota: not covered yetTennessee: not covered yetTexasTXUtah: not covered yetVirginiaVAVermont: not covered yetWashington: not covered yetWisconsin: not covered yetWest Virginia: not covered yetWyoming: not covered yet

AvailableNot yet

States

Don't see your state? Ask for it.

Tell us which state to add next. Requests help us decide the order.

Your place

Every city, township or county in a covered state, with its water system, sewer plant, watershed and electric utility from public records.

Your scenario

Campus size and cooling design, from cooling towers to closed loops, run on 30 years of local hourly weather.

Open methods

Equations, parameters, sources and checks are published, and the models are open source. Read the methods.

Planning-level hydrologic assessment. Not engineering design. Estimates are screening values from public data, not a facility's design figures or a utility's capacity analysis. See something wrong? Each state's pages have a corrections form.