Ben,
Are you looking for salt resistant grass for putting greens? Fairways? Everything?
Forrest is correct that fescues can tolerate some salts in the irrigation water....as can bluegrass, bentgrass to a lessor extent. In the past year of witnessing bent, blue and fescue being grown with horrible water in Michigan, I think the soil type has a factor in the salt issue as well. In sandier soil, the salts seem to affect the bentgrass noticeably. In heavier soils, the blues and fescues seem to be ok for now. However, the sandier soils afford the ability to be flushed easier when rainfall occurs.
Give us a little more detail concerning the application. Perhaps there is a turf/soil/management combo that will you get you your answer.
Joe
p.s. Once this gets real technical, watch me bail out of the discussion and rely on guys like Mahaffey and Galea. I'm pretty smart that way!