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Evaluating mediums and plating techniques for enumerating bacteria in water distribution systems
Author(s) -
Means Edward G.,
Hanami Lynn,
Ridgway Harry F.,
Olson Betty H.
Publication year - 1981
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.1551-8833.1981.tb04805.x
Subject(s) - enumeration , bacteria , plating (geology) , plate count , groundwater , incubation , distribution (mathematics) , surface water , environmental science , microbiology and biotechnology , biology , environmental engineering , mathematics , engineering , paleontology , mathematical analysis , biochemistry , genetics , geotechnical engineering , combinatorics
Two drinking water distribution systems, one containing chlorinated surface water, the other unchlorinated groundwater, were sampled bimonthly from June 1978 through September 1979 to evaluate mediums and plating techniques for bacterial enumeration. Both total and pigmented bacterial colonies were counted by using several different mediums at 20° C and 35° C incubation conditions with both the spread plate and pour plate methods. Results showed the pour plate method to be inferior to the spread plate method for the enumeration of total and pigmented bacteria in both distribution systems.