We agree that this shrub looks like a Summersweet (Clethra alnifolia). In the photo, the blooms appear to be past peak and developing seed already, which would explain why there was no scent. July is a typical flowering period for this species (and some varieties even bloom later, into August or even very early September), but perhaps this individual bloomed on the early side, either due to its genetics or the weather that year.

Miri