USGS Ohio Water Science Center

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Ohio Water Microbiology Lab

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Ohio Water Science Center

USGS In Your State

USGS Water Science Centers are located in each state.

There is a USGS Water Science Center office in each State. Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusettes South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

Analytical Field Methods


Coliphage are viral indicators that infect and replicate in coliform bacteria, primarily E. coli. The OWML analyzes water samples by use of two USEPA-approved coliphage methods—the two step enrichment procedure (presence or absence results) and the single-agar layer procedure (quantitative results).


Coliphage in water by two-step enrichment procedure

Coliphage in water by a
single-agar layer procedure

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