Why does Oedipus call himself "ungodly pollution"?

Oedipus refers to himself as "ungodly pollution" at the end of the play because he has learned that he not only killed his own father, but also that he slept with and had children with his own mother.  He is appalled and ashamed by his own fate, a fate prophesied to him, but which he has tried so hard to avoid.  Oedipus feels that he has offended the gods with his behavior, and so this...

Oedipus refers to himself as "ungodly pollution" at the end of the play because he has learned that he not only killed his own father, but also that he slept with and had children with his own mother.  He is appalled and ashamed by his own fate, a fate prophesied to him, but which he has tried so hard to avoid.  Oedipus feels that he has offended the gods with his behavior, and so this makes him ungodly.  Further, he himself has become polluted by his deeds, and so he is no longer fit to live out the remainder of his life and be buried in Thebes, where he has ruled.  In fact, it was Oedipus who decreed that the murderer of Laius would be exiled, and so he accepts this self-bestowed punishment without conflict.