Constructed wetland to treat gray water from homes in Mexico.
Sampling location near a port for large ships that dumps out their bilge water.
Rivera Maya beach: This is a control location because it should not contain contamination.
Sinkhole in Yucatan Mexico. The depth is greater than 110m and crosses the fresh/salt water interface at around 60m.
Sinkhole in Yucatan Mexico. This location is being sampled to determine the types of microorganisms living there.
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