sci fi movie from the early 1970's

[ajax7925]

sci fi movie from the early 1970's
I saw this movie in the early 1970's, the movie was simlar in the six million doallr man:
Population: Zero.  Where the town was 'dead'.  in the movie the whole town was dead, and their water turned dark yellow.  That's all I remember about this movie.

thanks

[Andrew]

Could this be from "The Andromeda Strain" (1971)?

[Gerry]

That's the one that came to mind for me too.

[ajax7925]

The Andromeda Strain,  that's it.  Thank You very much.