283.31(4)(b)(b) That facility expansions, production increases, or process modifications which result in new or increased discharges of pollutants at frequencies or levels in excess of the maximum discharges described in the permit shall be reported to the department under s. 283.59 (1);

283.31(4)(c)(c) That the permittee shall permit authorized representatives of the department upon the presentation of their credentials to enter upon any premises in which an effluent source is located or in which any records are required to be kept for the purpose of administering s. 283.55;

283.31(4)(d)(d) That the permittee shall at all times maintain in good working order and operate as efficiently as possible any facilities or systems of control installed by the permittee to achieve compliance with the terms and conditions of the permit;

283.31(4)(e)(e) That if a toxic effluent standard or prohibition, including any schedule of compliance specified in such effluent standard or prohibition, is established under s. 283.21 (1) for a toxic pollutant present in the permittee’s discharge and, if such standard or prohibition is more stringent than any limitation upon such pollutant in the permit, the department shall revise or modify the permit in accordance with the toxic effluent standard or prohibition;

283.31(5)(5) Each permit issued by the department under this section shall, in addition to those criteria provided in subs. (3) and (4), specify maximum levels of discharges. Maximum levels of discharges shall be developed from the permittee’s reasonably foreseeable projection of maximum frequency or maximum level of discharge resulting from production increases or process modifications during the term of the permit.

283.31(5m)(5m) The department shall include the requirements of 40 CFR 451.11 in permits issued under this section for concentrated aquatic animal production facilities described in 40 CFR 451.10. The department may not include additional conditions in a permit for a fish farm except as necessary for the farm to meet the applicable limitations, standards, and other provisions described in sub. (3) (a) to (f). Any conditions included in a permit issued under this section for a fish farm shall be limited to site-specific best management practices to the greatest extent allowed under federal law.

283.31(6)(6) Any permit issued by the department under this chapter which by its terms limits the discharge of one or more pollutants into the waters of the state may require that the location, design, construction and capacity of water intake structures reflect the best technology available for minimizing adverse environmental impact.

283.31(7)(7) The holder of a permit under this section shall pay $100 to the department as a groundwater fee on January 1 if the permittee discharges effluent on land or if the permittee produces sludge from a treatment work which is disposed of on land. If the permittee discharges effluent on land and disposes of sludge from a treatment work on land, the permittee shall pay $200 to the department as a groundwater fee on January 1. The moneys collected under this subsection shall be credited to the environmental fund for environmental management.

283.31(8)(8) The holder of a permit under this section for a concentrated animal feeding operation shall annually pay to the department a fee of $345, which shall be credited to the appropriation account under s. 20.370 (9) (ag). The department shall annually submit a report to the joint committee on finance and, under s. 13.172 (3), to the standing committees of the legislature with jurisdiction over agricultural and environmental matters describing the use of the moneys credited to the appropriation account under s. 20.370 (9) (ag) under this subsection and the use of the moneys appropriated under s. 20.370 (9) (ap).

283.31 AnnotationThis section does not govern dam removal. Ch. 31 does. Froebel v. DNR, 217 Wis. 2d 652, 579 N.W.2d 774 (Ct. App. 1998), 97-0844.

283.31 AnnotationA concentrated animal feeding operation (CAFO) under s. 283.01 (12) includes not only where the animals are confined, but also the equipment that applies the animal waste to fields outside the confinement area, whether the fields are owned by the CAFO operator or others. Any overapplication of manure by the operator is a discharge under s. 283.01 (5) whether because of runoff to surface waters or percolation to groundwater. The Department of Natural Resources has authority to regulate discharges from overapplication of manure from a CAFO regardless of whether the discharge occurs on land owned by the CAFO. Maple Leaf Farms, Inc. v. DNR, 2001 WI App 170, 247 Wis. 2d 96, 633 N.W.2d 720, 00-1389.

283.31 AnnotationThe Department of Natural Resources had the explicit authority to impose both an animal unit maximum and an off-site groundwater monitoring condition upon a permittee’s reissued permit, pursuant to subs. (3) to (5) and related regulations. Clean Wisconsin, Inc. v. DNR, 2021 WI 71, 398 Wis. 2d 386, 961 N.W.2d 346, 16-1688.

283.31 AnnotationThe DNR has authority under sub. (1) to issue permits to federal agencies. 68 Atty. Gen. 52.

283.33(1)(1) Requirement. Except as provided in sub. (1m), an owner or operator shall obtain a permit under this section for any of the following:

283.33(1)(a)(a) A discharge from a discernible, confined, and discrete conveyance of storm water associated with an industrial activity that meets criteria in rules promulgated by the department.

283.33(1)(am)(am) A discharge from a discernible, confined, and discrete conveyance of storm water associated with a construction site, including a construction site for a building, that meets criteria in rules promulgated by the department.

283.33(1)(b)(b) A discharge of storm water from a municipal separate storm sewer system serving an incorporated area with a population of 100,000 or more, as determined by the 1990 federal census.

283.33(1)(c)(c) A discharge of storm water from a municipal separate storm sewer system serving an area located in an urbanized area, as determined by the U.S. bureau of the census based on the latest decennial federal census.

283.33(1)(cg)(cg) A discharge of storm water from a municipal separate storm sewer system serving an area with a population of 10,000 or more and a population density of 1,000 or more per square mile, if the system is designated by the department to be regulated under this section based on an evaluation of whether the storm water discharge results in, or has the potential to result in, water quality standards being exceeded, including impairment of designated uses, or in other significant water quality impacts, including habitat and biological impacts.

283.33(1)(cr)(cr) A discharge of storm water from a municipal separate storm sewer system that is designated by the department to be regulated under this section because the system contributes substantially to the pollutant loadings of a physically interconnected municipal separate storm sewer system that is regulated under this section.

283.33(1)(d)(d) A discharge of storm water from a facility or activity, other than a facility or activity under pars. (a) to (cr), if the department determines that the discharge either contributes to a violation of a water quality standard or is a significant contributor of pollutants to the waters of the state.