It added property owners must register their interest by 28 February to qualify for the scheme.
Godfrey Claff, executive councillor for planning, said the “state-of-the-art upgrades” would improve the water quality of rivers and streams in the borough.
“The level of phosphates in the River Wye has been holding up development, particularly of much-needed housing in the Buxton and Dove Holes area, so this will help unlock the blocks and enable us to progress planning applications whilst ensuring they don’t adversely affect protected habitats,” Claff added.
The Labour-run council said it was writing to property owners who were likely to be eligible.
Jean Todd, executive councillor for climate change and environment, added: “This scheme directly addresses pollution at the source by supporting households and businesses with otherwise potentially expensive but essential upgrades to their drainage systems.”