The work presented here demonstrates the utility of the integrated cell culture-reverse transcriptase-polymerase chain reaction( ICC-RT-PCR) coupled with nested PCR to detect human astroviruses and enteroviruses in sludge biosolids. Viruses were concentrated by beef extract elution and organic flocculation prior to analysis by a plaque assay and ICC-RT-PCR. Astroviruses were detected in all but one sample and all of the samples were positive for enteroviruses. We have demonstrated the prevalence and frequency of astrovirus in sludge and validated the ICC-RT-PCR/nested PCR technique as a useful tool to detect viruses in sludge.