USGS Ohio Water Science Center

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Ohio Water Microbiology Lab

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Ohio Water Science Center

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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.

OWML: QA/QC

Quality Assurance/Quality Control Manual: Ohio Water Microbiology Laboratory

 

Table 2.  Acceptance criteria for laboratory water quality-assurance checks. [Adopted from USEPA (1978), APHA (2005), and ASTM (1999); NA is not applicable]

 

DEIONIZED

MILLIQ

ACTION

warning

shut down

shut down

Specific conductance (ms/cm)

3

5

2

Turbidity

1

5

1

Heterotrophic plate count (colonies/mL)

NA

NA

<1

Total organic carbon (mg/L)

0.5

10

NA

Nutrients individual (mg/L)

0.1

1

NA

 

   

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