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OWML: QA/QC

Quality Assurance/Quality Control Manual: Ohio Water Microbiology Laboratory

 

Table 5.  Culture methods for indicator bacteria used by the Ohio Water Microbiology Laboratory (OWML) [DW is drinking water, RW is recreational water]

BACTERIA

METHOD

TYPE OF METHOD

REFERENCE

Total coliforms

mENDO method
Appendix C1

Compliance—DW

Official—other waters

Britton and Greeson (1989)

APHA (2006, Section 9222B)

MI method
Appendix C2

Compliance—DW

Official—other waters

USEPA (2002)

Colilert method
Appendix C3

Compliance—DW, RW

Official—other waters

Idexx Corp., Westbrook, ME

APHA (2004, Section 9223)

Fecal coliforms

mFC method
Appendix C4

Compliance—DW

Official—other waters

Britton and Greeson (1987)

APHA (2006, Section 9222D)

Escherichia coli

Modified mTEC
Appendix C5

Compliance—RW, DW Official—other waters

USEPA (2006a)

MI method
Appendix C2

Compliance—DW

Official—other waters

USEPA (2002)

Colilert method
Appendix C3 (water),

Appendix C6 (sediment)

Compliance—DW, RW

Official—other waters
Official - sediment

Idexx Corp., Westbrook, ME

APHA (2004, Section 9223)

Myers and others (2007)

Enterococci

mEI method
Appendix C7

Appendix C8

Compliance—RW, DW

Official—other waters

USEPA (2006b)

APHA (2007, Section 9230C)

Enterococci Enterolert
Appendix C9

Compliance—DW, RW

Official—other waters

Idexx Corp., Westbrook, ME

APHA (2007, Section 9230D)

Clostridium perfringens

Modified mCP method
Appendix C10

Official—all waters

USEPA (1996), modified by OWML