"August Mackmull GmbH" (builders)

"OWR" (manufacturer of decontamination equipment)

"Elzal Service Schneider" (Schneider Coach Travel)
"Strauss Erika Einzelhandel" (toy store)

"Blechnerei Mack" (Tinsmiths Mack)
"Finkenrath" (former firm; famous as a tax fraudster)
"Glaserei Kaufmann" (Glazier Kaufmann)
"Spitzer Silo-Fahrzeugwerke GmbH" (Europeans largest silo vehicles manufacturer)

The water castle of Dallau was bought up by the municipality Elztal in 1974 AD.It is the only remnant of a former and much larger water castle.