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GiardiaFITC

More About the Microscopic Particulate Analysis

The purpose of the Microscopic Particulate Analysis (MPA) is to determine if well water is true groundwater or surface water that has recently infiltrated into the aquifer that the well is finished in. The principle behind the analysis is that surface water organisms such as algae should not be present in true groundwater. If they are then pathogenic organisms such as Giardia, Cryptosporidium or verotoxigenic Escherichia coli might also be present and a higher degree of treatment will be required to make the water potable (i.e. more than just chlorination). The protocol is based on an old USEPA method that has not been updated since 1992 and is not very efficient although it does provide a benchmark for establishing risk. More information on better methods that we offer is provided in the links below.

MPAInfo   Choosing a method       MPA Development-1

MPA Development-2     Presentation