Wisconsin Department of Natural Resources

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Topic: Wastewater Definitions

NR 207.02(2)

(2) "Bioaccumulation factor" means the ratio of the concentration of a substance in an aquatic organism to the concentration of the substance in water to which the organism is exposed regardless of whether the concentration in the organism results solely from body contact with the water or from body contact plus ingestion of food contaminated with the substance, as determined under ch. NR 105 and associated technical support documents.NR 101.03(1)

Wastewater means any process waste water, cooling water, sanitary waste water, treatment solids and by-products, or other wastes whose discharge requires a Wisconsin Pollution Discharge Elimination System (WPDES) permit.

(1) "Cooling water" means any water which is used primarily for cooling of raw materials, products, or equipment.

NR 207.02(3)

(3) "Exceptional resource waters" means any surface water, or portion thereof, in s. NR 102.11.

NR 101.03(2)

(2) "Facility" means a publicly owned treatment works, or an operating plant or establishment carrying on any manufacturing activity, trade, or business on a common site, including similar such plants under common ownership or control located on contiguous properties. Plants or establishments under common ownership or control located on separate sites shall be considered separate and individual facilities.

NR 207.02(4)

(4) "Fish and aquatic life water" means any surface water, or portion thereof, in s. NR 102.13.

NR 207.02(5)

(5) "Great Lakes system" means any surface water in s. NR 102.12 (1).

NR 207.02(6)

(6)

NR 207.02(6)(a)

(a) "Increased discharge" means any change in concentration, level or loading of a substance which would exceed an effluent limitation specified in a current WPDES permit.

NR 207.02(6)(b)

(b) Except as provided in par. (c), increased discharge does not include the initial imposition of effluent limitations for substances which were in a previous discharge but which had not been limited in a prior or the current permit unless the initial imposition of effluent limitations occurs due to a changed discharge location, other than a change in location necessary to accommodate a mixing zone as provided for in ch. NR 106.

NR 207.02(6)(c)

(c) For discharges of bioaccumulative chemicals of concern (BCCs), defined in s. NR 105.03 (9), to the Great Lakes system, increased discharge means:

NR 207.02(6)(c)1.

1. An increased discharge as defined in par. (a);

NR 207.02(6)(c)2.

2. The initial imposition of an effluent limitation for a BCC that occurs due to an actual or expected increase in loading of the BCC; and

NR 207.02(6)(c)3.

3. Any actual or expected increase in loading of a BCC which is caused by or will be caused by a facility expansion, a process modification, or the connection to an existing public or private wastewater treatment system of a substantial source of untreated or pretreated effluent containing BCCs, and which requires notification to the department pursuant to s. NR 205.07 (2) (a) or (3) (c) or (d). Under this subdivision, increased discharge does not include any increase in the loading of BCCs that is caused by normal operational variability, changes in intake pollutants or increasing the rate or hours of production within the existing production capacity. Normal operational variability includes, for POTWs, any additional wastewater volume within the existing capacity of the POTW from commercial, industrial or residential growth which do not normally contribute substantial quantities of BCCs to the POTW's wastewater flow.

NR 101.03(2m)

(2m) "5-year rolling average" means the average of data from the current year plus the previous 4 years of data available since the beginning of calendar year 2000. Where 5 years of data is not available, the 5-year rolling average means the average of data from the current year plus any available data from the previous 4 years since the beginning of calendar year 2000.

NR 101.03(3)

(3) "Land disposal system" means an absorption or seepage pond, a ridge and furrow, a spray irrigation, a spray runoff, a subsurface field absorption, a surface spreading, or other installation on a land area used for the disposal of effluent by absorption or percolation into the ground.

NR 101.03(4)

(4) "Limit of detection" has the meaning specified in s. NR 149.03 (15).

NR 101.03(5)

(5) "Limit of quantitation" has the meaning specified in s. NR 149.03 (16).

NR 207.02(7)

(7) "Loading" means the concentration of a substance within a discharge multiplied by the flow of that discharge.

NR 101.03(6)

(6) "Major permittee" or "minor permittee" means any WPDES permit holder thus classified by the U.S. environmental protection agency in conjunction with the department under 40 CFR 122.2.

NR 101.03(7)

(7) "Municipality" means, as defined in s. 299.01 (8), Stats., any city, town, village, county, county utility district, town sanitary district, public inland lake protection and rehabilitation district or metropolitan sewage district.

NR 207.02(8)

(8) "New discharge" means any point source which has not received a WPDES permit from the department prior to March 1, 1989.

NR 207.02(9)

(9) "Outstanding resource waters" means any surface water, or portion thereof, in s. NR 102.10.

NR 101.03(8)

(8) "Person" means an individual, partnership, corporation, association, municipality, state agency, or interstate agency owning or operating a facility discharging wastewater to a surface water, to a land disposal system, or to a publicly owned treatment works.

NR 101.03(9)

(9) "Process waste water" means any water, except cooling water, which comes into direct contact with or results from the production or use of any raw material, service item, intermediate product, finished product, byproduct, or waste product, and may contain in solution or suspension various components of such raw materials, items or products.

NR 101.03(10)

(10) "Publicly owned treatment works" means a sewage treatment plant owned by a municipality and the sewerage system tributary thereto.

NR 207.02(10)

(10) "Receiving water" means the portion of a surface water which will be affected by a proposed new or increased discharge.

NR 101.03(11)

(11) "Sanitary waste water" means waste water associated with personal hygiene, food preparation, or cleaning but does not include waste water from commercial or bulk production of goods or services such as, but not limited to, laundromats, commercial laundries, carwashes, food production, or other manufacturing activities.

NR 207.02(11)

(11) "Significant lowering of water quality" means a lowering of water quality determined to be significant under s. NR 207.05.

NR 101.03(12)

(12) "Surface water" means those portions of Lake Michigan and Lake Superior within the boundaries of Wisconsin, all lakes, bays, rivers, streams, springs, ponds, impounding reservoirs, marshes, water courses, drainage systems and other surface water, natural or artificial, public or private within the state or under its jurisdiction, except those waters which are entirely confined and completely retained upon the property of a facility.

NR 207.02(12)

(12) "Surface water" means all waters of the state, as designated in 281.01 (18), Stats., except groundwater.

NR 101.03(13)

(13) "Wastewater" means any process waste water, cooling water, sanitary waste water, or other wastes whose discharge requires a WPDES permit, discharged to a surface water including such discharge through a storm sewer, to a land disposal system, or to a publicly owned waste treatment works.

NR 207.02(13)

(13) "Water quality based effluent limitations" means effluent limitations established by the department pursuant to s. 283.13 (5), Stats.

NR 101.03(14)

(14) "WPDES permit" means a Wisconsin pollutant discharge elimination system permit issued by the department pursuant to ch. 283, Stats.

NR 207.02(1)

(1) "Assimilative capacity" means the difference between the water quality criterion for a substance identified in ch. NR 102 or 105 and the existing level of that substance in a surface water.

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