DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER AND RADIOLOGICAL PROTECTION
PUBLIC BATHING BEACHES
(By authority conferred on the director of public health by section 12544 of Act No.
368 of the Public Acts of 1978, as amended, being S333.12544 of the Michigan
R 325.2101 Definitions.
Rule 1. (1) "Act" means sections 12541 to 12546 of Act No. 368 of the Public
Acts of 1978, as amended, being SS 333.12541 to 333.12546 of the Michigan
(2) "Bathing beach" means a beach or bathing area offered to the public for
recreational bathing or swimming. It does not include a swimming pool as defined in
section 12521 of Act No. 368 of the Public Acts of 1978, as amended, being S
333.12521 of the Michigan Compiled Laws.
(3) "Escherichia coli" or "E. coli" means a bacteria which is a member of the
family enterobacteriaceae and which is the predominant facultative anaerobe in humans
and warm-blooded animals. Therefore, it is an indicator of the presence of human or
animal fecal material in water. The organism is identified by a variety of laboratory
methods with definitive identifying characteristics described by Bergey's Manual of
Bacteriology (Williams and Wilkins, 9th Edition, 1994).
(4) "Geometric mean" means the antilog of the summation of the logarithms
of the values for the samples examined divided by the number of samples.
(5) "Health officer" means the administrative officer of a city, county, or district
(6) "Sanitary or environmental survey" means and includes all of the following:
(a) A survey and an evaluation of data of the applicable contributory watershed for
pollution, including domestic, industrial, commercial, and agricultural sources.
(b) A survey and an evaluation of data of the bathing beach for sources of pollution
and safety hazards, including soil conditions, drop offs, water movement, and
submerged and other hazardous objects.
(c) Water depth in diving areas.
(d) An evaluation of proposed or existing bathing and swimming loads.
(7) "Standard methods" means the publication entitled Standard Methods for the
Examination of Water and Wastewater, 18th Edition - 1992, as published by the
American public health association, the American water works association, and the
water environment federation. This publication is adopted by reference in these rules and
is on file and available for inspection in the Bureau of Environmental and
Occupational Health, Michigan Department of Public Health, 3423 North Martin Luther
King Jr. Blvd., Lansing, Michigan. Copies are available from the American Public
Health Association, 1015 Fifteenth Street, N.W., Washington, D.C. 20005.