When does the social security check stop: month after death or month of the death?

my husband was very alive in june , he got his s.s on july 3 for the june payment he died on on the 30 of july...my question is if the july payment was for june why did s.s take away the payment at his death date on the 30th if in fact the july payment was for june?

Search the SS website ssa.gov . There should be information explaining how the checks work upon the death of the recipient. You could also be eligible to get any money that may be still due to him.
I'm sorry for your loss, lonelyheart.