Why the cresol come from the sour water

Dear all, 1.The stripping sour water is clean, low salt and low organic material, that  is good to reuse. 2. While we analysis the impurities of stripping sour water, we find some cresol in the water, and the cresol will cause the unpleasant flair. 3.Could you kindly to tell me, why the cresol come from the sour water, any literature or data , thanks.