Section 465.430  Action Response to Laboratory Results

For laboratory results concerning samples from public water supplies and their sources, presumptive positive microbiological test results are to be reported to the Illinois Environmental Protection Agency and the public water supply as preliminary without waiting for membrane filter verification or MTF completion.  After membrane filter verification or MTF completion or both, the adjusted results shall be reported.  The Illinois Environmental Protection Agency and the public water supply shall be notified when results indicate that noncoliforms may have interfered with the total coliform analysis.