WISCONSIN'S INDUSTRIAL WASTEWATER INVENTORY PROGRAM
Charles R. Case, Natural Resources Specialist
State of Wisconsin
Department of Natural Resources
Madison, Wisconsin 53707
INTRODUCTION
Wisconsin law [ 1 ]  requires that facilities discharging industrial wastewater submit an
annual effluent report to the State Department of Natural Resources.    Through Chapter
NR  101  of the Wisconsin Adminstrative Code [2], the Department's Surveillance Section has implemented a self-monitoring wastewater inventory program currently encompassing 1,200 industrial facilities.    The first NR  101 reports were due March  1,  1974
and characterized discharges for calendar year 1973.    Each succeeding year has seen an
increase in the number of reporting facilities, in the quantity and quality of effluent
information, and in the utilization of the inventory data.    Recent State legislation [3]
assigns additional responsibilities to the NR  101  program.
REPORTING ELIGIBILITY AND REPORT CONTENTS
All industries discharging process or cooling wastes to surface waters are required to
report the volume and composition of the effluent if both of the    following conditions
apply:    (a) the total volume exceeds 10,000 gallons per day on one or more days
during the year, and (b) the effluent exceeds the concentration or daily quantity reporting levels of one or more of the substances listed in Table I.    Equivalent but independent reporting is required for discharges of industrial wastewaters to land disposal
systems or to publicly owned treatment works.    Recent code changes [4]  also provide
for reporting of effluents of less than 10,000 gallons per day in cases of potentially
deleterious discharges to any of the three receiving systems.    Except under special circumstances, sanitary wastewaters, liquid agricultural wastes, hauled liquid-solid slurrys,
precipitation runoff, and effluents from municipally owned sources are excluded from
the program.
Figures 1, 2, 3, and 4 display portions of a completed NR 101 effluent report [5].
The reporting forms are printed by computer with the appropriate page headings and
the preceding year's effluent data.   The facility need only update information that has
changed during the currently reported calendar year by entering the changed values in
the parenthesis immediately above last year's figures.   Unchanged data is not reentered,
and additional space is provided for previously unreported information.    A reporting
form is typically six pages in length and is printed on 10 5/8" x  11", three-part
carbonless computer paper.
Page 1 of the report   as shown in Figure 1, provides facility identification information.
Included are mailing and location addresses, dates, acreage and employment statistics,
production schedules, standard industrial code number, and (not shown) parent
corporation information, facility contact and telephone number, and a certifying
signature.
Page 2 and Figure 2 is the outfall identification page.   One line is used to report
each outfall carrying effluent from the facility.   Each line lists identification numbers,
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