Page 42 - GPHS Environmental Public Health Standards (Foundation of Public Health) v1
P. 42

Microbiological Testing


















                                                                                          AnalyzeforE.coli


                                                                                          ➢ 4 samplesper month from distributionsystem


                                                                                          ➢ Different points

                                                                                          ➢ Forward, aft, upper, lower


                                                                                          ➢ Follow-up on positive testresults


                                                                                          ➢ Recordskept for12 months
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