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Frequency‐of‐Occurrence Monitoring for Coliform Bacteria in Small Water Systems
Author(s) -
Pipes Wesley O.,
Mueller Karolyn,
Troy Marleen,
Minnigh Harvey A.
Publication year - 1987
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1987.tb02944.x
Subject(s) - membrane filter , water quality , environmental science , biology , membrane , ecology , genetics
The effectiveness of Clark's presence–absence (P–A) test was compared with that of the membrane filter (MF) technique during an evaluation of the frequency‐of‐occurrence approach to microbiological monitoring of water systems. Results showed no significant difference between the fractions that were positive by the two methods. Major changes in the microbiological quality of the water were detected with equal frequency by the P–A test and the MF method and were detected more readily by the frequency‐of‐occurrence parameter than by the average MF coliform count.