66.0819(1)(1) A town, village, or city may construct, acquire, or lease, or extend and improve, a plant and equipment within or without its corporate limits for the furnishing of water to the municipality or to its inhabitants, and for the collection, treatment, and disposal of sewage, including the lateral, main and intercepting sewers, and all necessary equipment. The plant and equipment, whether the structures and equipment for the furnishing of water and for the disposal of sewage are combined or separate, may by ordinance be constituted a single public utility.

66.0819(2)(2) The provisions of this chapter and chs. 196 and 197 relating to a water system, including those provisions relating to the regulation of a water system by the public service commission, apply to a consolidated water and sewage disposal system as a single public utility. In prescribing rates, accounting and engineering practices, extension rules, service standards or other regulations for a consolidated water and sewage disposal system, the public service commission shall treat the water system and the sewage disposal system separately, unless the commission finds that the public interest requires otherwise.

66.0819(3)(3) A town, village or city which owns or acquires a water system and a plant or system for the treatment or disposal of sewage may by ordinance consolidate the systems into a single public utility. After the effective date of the ordinance the consolidated utility is subject to this section as though originally acquired as a single public utility.

66.0821(1)(a)(a) “Municipality” means a town, village, city or metropolitan sewerage district created under ss. 200.01 to 200.15 or under ss. 200.21 to 200.65.

66.0821(1)(b)(b) “Sewerage” is a comprehensive term, including all constructions for collection, transportation, pumping, treatment and final disposition of sewage or storm water and surface water.

66.0821(2)(a)1.1. In addition to all other methods provided by law, a municipality may construct, acquire or lease, extend or improve any plant and equipment within or without its corporate limits for the collection, transportation, storage, treatment and disposal of sewage or storm water and surface water, including necessary lateral, main and interceptor sewers, and a town, village or city may arrange for the service to be furnished by a metropolitan sewerage district or joint sewerage system.

66.0821(2)(a)2.2. If the extension of a sewer line or water main that is described under subd. 1. is required because of a new subdivision, as defined in s. 236.02 (12), or commercial development, the municipality may recoup some or all of the costs that it has incurred for the extension by a method described under subd. 1. or by any other method of financing agreed to by the municipality and the developer. If a person, whose property is outside of the subdivision for which a developer is paying, or has paid, the costs of a sewerage project under this subdivision, connects an extension into the sewerage project after the amount is established that the developer is required to pay under this subdivision, that person shall pay to the developer an amount determined by the public service commission. The public service commission shall promulgate rules to determine the amount that such a person shall pay to a developer. The rules promulgated under this subdivision, shall be based on the benefits accruing to the property that connects an extension into the sewerage project.

66.0821(2)(b)(b) The governing body of a municipality, and the officials in charge of the management of the sewerage system as well as other officers of the municipality, are governed in the discharge of their powers and duties under this section by ss. 66.0809 to 66.0813 or 62.69 (2) (f), to the extent consistent with this section, or, in the case of a metropolitan sewerage district created under ss. 200.21 to 200.65, by ss. 200.55 and 200.59.

66.0821(3)(a)(a) Except as provided in s. 66.0721, all or a portion of the cost of exercising the authority under sub. (2) may be funded, to the extent applicable, from the municipality’s general fund, by taxation, special assessment or sewerage service charges, by municipal obligations or revenue bonds or from any combination of these sources.

66.0821(3)(b)(b) If funding under par. (a) in whole or in part is by the issue and sale of revenue bonds, the payments shall be made as provided in s. 66.0621 to the extent not inconsistent with this section. In this paragraph, “public utility” as used in s. 66.0621 includes the sewerage system, accessories, equipment and other property, including land. The mortgage or revenue bonds or mortgage certificates do not constitute an indebtedness of the municipality and may be secured only by the sewerage system and its revenue, and the franchise provided for in this section.

66.0821(3)(c)(c) Any municipality may pledge, assign or otherwise hypothecate the net earnings or profits derived or to be derived from a sewerage system to secure the payment of the costs of purchasing, constructing or otherwise acquiring a sewerage system or any part of a sewerage system, or for extending or improving the sewerage system, in the manner provided in s. 66.0621 (5).

66.0821(4)(a)(a) The governing body of the municipality may establish sewerage service charges in an amount to meet all or part of the requirements for the construction, reconstruction, improvement, extension, operation, maintenance, repair, and depreciation of the sewerage system, and for the payment of all or part of the principal and interest of any indebtedness incurred for those purposes, including the replacement of funds advanced by or paid from the general fund of the municipality. Service charges made by a metropolitan sewerage district to any town, village, or city shall be levied by the town, village, or city against the individual sewer system users within the corporate limits of the municipality, and the municipality shall collect the charges and promptly remit them to the metropolitan sewerage district. Delinquent charges shall be collected in accordance with sub. (4) (d). The governing body of a municipality may not establish any charge under this paragraph that is not related to providing sewerage service.

66.0821(4)(b)(b) For the purpose of making equitable charges for all services rendered by the sanitary sewerage system to the municipality or to citizens, corporations and other users, the property benefited by the system may be classified, taking into consideration the volume of water, including surface or drain waters, the character of the sewage or waste and the nature of the use made of the sewerage system, including the sewage disposal plant. The charges may include standby charges to property not connected but for which sewerage system facilities have been made available.

66.0821(4)(c)(c) For the purpose of making equitable charges for all services rendered by a storm water and surface water sewerage system to users, the property served may be classified, taking into consideration the volume or peaking of storm water or surface water discharge that is caused by the area of impervious surfaces, topography, impervious surfaces and other surface characteristics, extent and reliability of mitigation or treatment measures available to service the property, apart from measures provided by the storm water and surface water sewerage system, and any other considerations that are reasonably relevant to a use made of the storm water and surface water sewerage system. The charges may also include standby charges to property not yet developed with significant impervious surfaces for which capacity has been made available in the storm water and surface water sewerage system. No additional charges, beyond those charged to similar properties, may be charged to a property for services rendered by a storm and surface water system for a property that continually retains 90 percent of the difference between the post-development and predevelopment runoff on site.

66.0821(4)(d)(d) Sewerage service charges shall be collected and charged and shall be a lien upon the property served in the same manner as water rates are charged and collected under s. 62.69 (2) (f) or 66.0809 to the extent applicable, except that charges of a metropolitan sewerage district created under ss. 200.21 to 200.65 shall be assessed and collected as provided in s. 200.55 (5).

66.0821(5)(a)(a) If a user of a service complains to the public service commission that rates, rules and practices are unreasonable or unjustly discriminatory, or if a holder of a mortgage or revenue bond or mortgage certificate or other evidence of debt, secured by a mortgage on the sewerage system or any part of the system or pledge of the income of sewerage service charges, complains that rates are inadequate, the public service commission shall investigate the complaint. If there appears to be sufficient cause for the complaint, the commission shall set the matter for a public hearing upon 10 days’ notice to the complainant and the town, village or city. After the hearing, if the public service commission determines that the rates, rules or practices complained of are unreasonable or unjustly discriminatory, it shall determine and by order fix reasonable rates, rules and practices and may make any other order respecting the complaint that is just and reasonable, including, in the case of standby charges imposed under sub. (4) (c), an order that a municipality refund to the user any amount of the standby charges that have been collected if the user has filed a complaint with the public service commission not later than 60 days after receiving the original notice of charge or after receiving a notice of charge that relates to an increased standby charge. The proceedings under this paragraph are governed, to the extent applicable, by ss. 196.26 to 196.40. Except as provided in pars. (e) and (f), the commission shall bill any expense of the commission attributable to a proceeding under this paragraph to the town, village or city under s. 196.85 (1).

66.0821(5)(b)(b) Judicial review of a determination of the public service commission under par. (a) may be had by any person aggrieved in the manner prescribed in ch. 227.

66.0821(5)(c)(c) For purposes of this subsection, “user” of a service includes a licensed disposer, as defined in s. 281.49 (1) (b), who disposes of septage at a municipal sewage system under a disposal plan under s. 281.49 (5) and initiates under s. 281.49 (11) (d) a review under par. (a) of a disputed septage disposal fee by the public service commission.