Wisconsin Administrative Code

NR 104.24 Wisconsin-Michigan waters.

NR 104.25 Wisconsin-Michigan-Illinois-Indiana waters.

NR 104.26 Trout waters.

NR 104.27 Fish reproduction.

NR 104.28 Revision of designated uses. Note: Chapter NR 104 as it existed on September 30, 1976 was repealed and a new chapter NR 104 was created effective October 1, 1976. Corrections made under s. 13.93 (2m) (b) 7., Stats., Register, August, 1997, No. 500. NR 104.02 Surface wat…

NR 105.01 Purpose. The purpose of this chapter is to establish water quality criteria, and methods for developing criteria and secondary values for toxic substances to protect public health and welfare, the present and prospective use of all surface waters for public and private …

NR 105.02 Applicability. The provisions of this chapter are applicable to surface waters of Wisconsin as specified in chs. NR 102 to 104 and in this chapter. (1) SITE SPECIFIC CRITERIA AND SECONDARY VALUES. A criterion contained within this chapter or a secondary value calculated…

NR 105.03 Definitions. (1) XAcute toxicityY means the ability of a substance to cause mortality or an adverse effect in an organism which results from a single or short-term exposure to the substance. (2) XAcute toxicity criterionY or XATCY means the maximum daily concentration o…

NR 105.04 Determination of adverse effects. (1) Substances may not be present in surface waters at concentrations which adversely affect public health or welfare, present or prospective uses of surface waters for public or private water supplies, or the protection or propagation …

NR 105.05 Acute toxicity criteria and secondary acute values for aquatic life. (1) MINIMUM DATABASE FOR ACUTE CRITERION DEVELOPMENT. (a) To derive an acute toxicity criterion for aquatic life, the minimum information required shall be the results of acceptable acute toxicity test…

NR 105.06 Chronic toxicity criteria and secondary chronic values for fish and aquatic life. (1) MINIMUM DATABASE FOR CHRONIC CRITERION DEVELOPMENT. (a) To derive a chronic toxicity criterion for aquatic life, the minimum information required shall be results of acceptable chronic…

NR 105.07 Wildlife criteria. (1) The wildlife criterion is the concentration of a substance which if not exceeded protects Wisconsin[s wildlife from adverse effects resulting from ingestion of surface waters of the state and from ingestion of aquatic organisms taken from surface …

NR 105.08 Human threshold criteria. (1) The human threshold criterion (HTC) is the maximum concentration of a substance established to protect humans from adverse effects resulting from contact with or ingestion of surface waters of the state and from ingestion of aquatic organis…

NR 105.09 Human cancer criteria. (1) The human cancer criterion (HCC) is the maximum concentration of a substance or mixture of substances established to protect humans from an unreasonable incremental risk of cancer resulting from contact with or ingestion of surface waters of t…

NR 105.10 Bioaccumulation factor. (1) The bioaccumulation factor used to derive wildlife, human threshold, human cancer and taste and odor criteria or secondary values is determined from a baseline BAF using the methodology provided in Appendix B to 40 CFR part 132. 40 CFR part 1…

NR 105.11 Final plant values. (1) A Final Plant Value (FPV) is the lowest plant value that was obtained with an important aquatic plant species in an acceptable toxicity test for which the concentrations of the test substance were measured and the adverse effect was biologically …

NR 106.01 Purpose. One purpose of this chapter is to specify how the department will calculate water quality based effluent limitations under s. 283.13 (5), Stats., for toxic and organoleptic substances and whole effluent toxicity. The other purpose of this chapter is to specify …

NR 106.02 Applicability. The provisions of this chapter are applicable to point sources which discharge wastewater containing toxic or organoleptic substances to surface waters of the state. History: Cr. Register, February, 1989, No. 398, eff. 3-1-89.

NR 106.03 Definitions. The following definitions are applicable to terms used in this chapter. (1g) “AMZ” means acute mixing zone concentration based on presence of a zone of initial dilution under s. NR 106.06 (3) (c). (1r) “Bioaccumulative chemical of concern” or “BCC” means an…

NR 106.04 General. (1) The department shall establish water quality-based effluent limitations whenever categorical effluent limits required under s. 283.13, Stats., are less stringent than necessary to achieve applicable water quality standards specified in chs. NR 102 to 105. W…

NR 106.05 Determination of the necessity for water quality based effluent limitations for toxic and organoleptic substances. (1) (a) General. The department shall establish water quality based effluent limitations for point source dischargers whenever the discharges from those po…

NR 106.06 Calculation of water quality based effluent limitations for toxic and organoleptic substances. (1) BASIS FOR LIMITATIONS. (a) The department shall establish water quality based effluent limitations for point source dischargers whenever such limitations are necessary, as…

NR 106.07 Application of and compliance with water quality based effluent limitations in permits. (1) PERMIT MONITORING FREQUENCY. The department shall determine on a case-by-case basis the monitoring frequency to be required for each water quality based effluent limitation in a …

NR 106.08 Determination of the necessity for whole effluent toxicity testing requirements and limitations. (1) GENERAL. The department shall establish whole effluent toxicity testing requirements and limitations whenever necessary to meet applicable water quality standards as spe…

NR 106.09 Whole effluent toxicity data evaluation and limitations. (1) DATA EVALUATION. Data evaluation procedures are specified in the whole effluent toxicity test methods specified in s. NR 219.04, Table A. In the event of a WET test failure, facility specific requirements shal…

NR 106.10 Noncontact cooling water additives. The department shall establish water quality based effluent limitations for toxic and organoleptic substances in noncontact cooling water discharges as follows: (1) For toxic and organoleptic substances commonly added by suppliers of …

NR 106.11 Multiple discharges. Whenever the department determines that more than one discharge may be affecting the water quality of the same receiving water for one or more substances, the provisions of this chapter shall be used to calculate the combined allowable load from the…

NR 106.115 Additivity of dioxins and furans.

NR 106.117 Schedules of compliance. NR 106.14 Analytical methods and laboratory requirements. Subchapter VI — Alternative Effluent Limitations for Temperature NR 106.70 Purpose. NR 106.71 Definitions. NR 106.72 Application for alternative effluent limitations for temperature. NR …

NR 106.14 Analytical methods and laboratory requirements. (1) Methods used for analysis of samples shall be those specified in ch. NR 219 unless alternative methods are specified in the WPDES discharge permits. Where more than one approved analytical method for a pollutant exists…

NR 106.145 Mercury regulation. NR 106.15 Limitations for mercury. Subchapter IV — Effluent Limitations for Ammonia Discharges NR 106.30 Applicability. NR 106.31 Definitions. NR 106.32 Calculation of water quality-based effluent limitations for ammonia. NR 106.33 Determination of …

NR 106.15 Limitations for mercury. Regardless of the effluent limitations determined under this chapter, the discharge of organic mercury compounds, inorganic mercury compounds, and metallic mercury shall not exceed the requirements in s. 281.17 (7), Stats., and ch. NR 100. Histo…

NR 106.30 Applicability. The provisions of this subchapter are applicable to point sources that discharge wastewater containing ammonia to surface waters of the state. This subchapter first applies to permits issued or reissued after March 1, 2004. Note: Any discharges of ammonia…

NR 106.31 Definitions. In this subchapter: (1) “Acute criterion” or “ATC” has the meaning in s. NR 105.03 (2) (2) “Chronic criterion” or “CTC” has the meaning in s. NR 105.03 (15) (3) “Early life stages” or “ELS” means the life stages of fish that include the pre-hatch embryonic …

NR 106.32 Calculation of water quality-based effluent limitations for ammonia. (1) BASIS FOR LIMITATIONS. (a) The department shall establish water quality based effluent limitations for point source dischargers of ammonia whenever the limitations are necessary, as determined by a…

NR 106.33 Determination of the necessity for water quality-based effluent limits for ammonia. (1) REASONABLE POTENTIAL. (a) For a permitted discharge that is not already subject to an ammonia water quality-based effluent limitation, the procedures specified in s. NR 106.05 shall …

NR 106.36 Alternative whole effluent toxicity monitoring for certain discharges of ammonia. (1) In addition to water quality based effluent limitations for ammonia, the department may establish whole effluent toxicity testing requirements and limitations pursuant to ss. NR 106.08…

NR 106.37 Schedules of compliance. (1) The department shall determine and specify a reasonable compliance schedule in the permit if the permittee is unable to meet the ammonia effluent limits determined according to this subchapter at the time of permit reissuance. The department…

NR 106.50 Purpose. The purpose of this subchapter is to specify how the department will calculate water quality-based effluent limitations for temperature under s. 283.13 (5), Stats., and to specify how the department will determine when the limitations will be included in Wiscon…

NR 106.51 Applicability. This subchapter applies to point sources that discharge cooling water, non-contact cooling water, or other wastewater to surface waters of the state if the discharge contains an associated heat load or is elevated in temperature relative to the ambient te…

NR 106.52 Definitions. In this subchapter, the following definitions are applicable to terms used: (1) “Ambient temperature” means the typical existing temperature of a surface water outside the direct influence of any point source discharge, which may include daily and seasonal …

NR 106.53 Parameters used to establish water quality-based effluent limitations for temperature. (1) RECEIVING WATER FLOW RATE (QS). The value of receiving water flow rate (Qs) used to determine effluent limitations for discharges to flowing waters shall be as follows: (a) Qs sha…

NR 106.54 Representative effluent temperature data. (1) The representative daily maximum effluent temperature is the highest effluent temperature known or expected to occur on any day under normal operating conditions at the time of permit issuance. Representative daily maximum e…

NR 106.55 Determination of water quality-based effluent limitations for temperature in WPDES permits. (1) GENERAL. The department shall determine water qualitybased effluent limitations for temperature to attain and maintain water quality standards and criteria specified in or de…

NR 106.56 Establishment of water quality-based effluent limitations for temperature in WPDES permits. (1) GENERAL. The department shall use the methods in this section to determine the need to establish water quality-based effluent temperature limitations in a permit. (2) REASONA…

NR 106.57 Effluent limitations for multiple thermal discharges. Whenever the department determines that more than one thermal discharge may be adversely affecting the water quality of the same receiving water, the provisions of both this subchapter and s. NR 106.11 shall be used …