“Uji Cemaran Mikroba Air Minum Isi Ulang Dari Depot Air Minum Di Wilayah Kabupaten Ponorogo”.

Refill drinking water is widely used by the people of Ponorogo district for household consumption and also for selling. Refill drinking water is not necessarily safe for consumption and there are bacteria, one of which is Eschericia coli. This bacterium can cause various diseases such as diarrhea and nausea. Microbiological research needs to be done to test the Total Plate Numbers and the Most Probable Numbers of Eschericia coli to determine refill drinking water that meets the requirements of SNI 01-3553-2006. Refill drinking water is taken from 5 different drinking water depots in Ponorogo District, each depot is taken 1 gallon. This research was conducted by testing the Total Plate Numbers and the Most Probable Number Eschericia coli. This Total Plate Figures will be calculated with the calculation of 30-300 colonies with a requirement of 1.0 x 105. And the results of the Escheria coli Most Probable Number (MPN) test will be seen directly with the MPN table on condition that no more than 2. From the results of the study, the results of the Total Plate Figures Test in refill drinking water in the Ponorogo District area Ponorogo Regency not meet the requirements of SNI 01-3553-2006 and the Most Probable Number Test (MPN) Eschericia coli do not meet the SNI 01-3553-2006 requirements. Keywords: Refill Drinking Water, ALT, MP