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Groundwater Microscopic Particulate Analysis (GMPA) This method is important for determining potential risk of groundwater contamination with Giardia and/or Cryptosporidium by identification and enumeration of surface water microbiota. The GMPA follows USEPA procedures as detailed in the Consensus Method for Determining Groundwaters Under the Direct Influence of Surface Water using Microscopic Particulate Analysis. Click here for GMPA Sampling Directions (pdf) Analysis Request Form (pdf) Ground Water Risk Factor Tables (pdf) A GMPA can be modified to include Giardia and Cryptosporidium analysis from the same sample, which is useful in obtaining additional water quality information about a given water source. Giardia and Cryptosporidium analyses are separate and are NOT included along with a GMPA UNLESS otherwise indicated on analysis request forms. Colorado Department of Public Health and Environment MPA Form EPA Ground H20 Consensus Method (1992) USEPA , Consensus Method for Determining Groundwaters Under the Direct Influence of Surface Water Using Microscopic Particulate Analysis (MPA). United States Environmental Protection Agency, Manchester Environmental Laboratory Report #910/9-92-029.1992.
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