NR 217.16   Relationship of WQBELs and TMDL based limitations.

NR 217.17   Schedules of compliance.

NR 217.18   Watershed adaptive management option.

NR 217.19   Variances for stabilization ponds and lagoon systems.

Ch. NR 217 Note Note: Effluent standards are being created for phosphorus at this time. Effluent standards for other pollutants may be added to this chapter at later dates.

Ch. NR 217 Note Note: Corrections made under s. 13.93 (2m) (b) 7., Stats., Register, August, 1997, No. 500.

subch. I of ch. NR 217 Subchapter I — General

NR 217.01 NR 217.01 Purpose. The purpose of this chapter is to reduce the amount of phosphorus discharged to surface waters by establishing effluent standards and limitations, including water quality based effluent limitations, for phosphorus in effluent discharged to surface waters of the state. Effluent standards and limitations are developed pursuant to ch. 283, Stats.

NR 217.01 History History: Cr. Register, November, 1992, No. 443, eff. 12-1-92; CR 10-035: am. Register November 2010 No. 659, eff. 12-1-10.

subch. II of ch. NR 217 Subchapter II — Phosphorus Effluent Standards and Limitations

NR 217.02 NR 217.02 Applicability. This subchapter is applicable to point sources which discharge phosphorus to the surface waters of the state.

NR 217.02 History History: Cr. Register, November, 1992, No. 443, eff. 12-1-92; CR 10-035: am. Register November 2010 No. 659, eff. 12-1-10.

NR 217.03 NR 217.03 Definitions. Definitions of terms and the meaning of abbreviations used in this subchapter are as defined in ss. NR 102.03, 106.03, 205.03, 210.03, and 243.03. In addition: “effluent standard” means any requirement for phosphorus established pursuant to s. 283.11 (3), Stats., and this subchapter.

NR 217.03 History History: Cr. Register, November, 1992, No. 443, eff. 12-1-92; CR 10-035: am. Register November 2010 No. 659, eff. 12-1-10.

NR 217.04 NR 217.04 Effluent standards and limitations for phosphorus.

NR 217.04(1) (1) General. Effluent limitations for total phosphorus shall be imposed in WPDES permits for wastewaters discharged to surface waters as specified in this section.

NR 217.04(1)(a) (a) An effluent standard for total phosphorus shall apply as follows:

NR 217.04(1)(a)1. 1. An effluent limitation equal to 1 mg/L total phosphorus as a monthly average shall apply to publicly owned treatment works and privately owned domestic sewage works subject to ch. NR 210 which discharge wastewater containing more than 150 pounds of total phosphorus per month, unless an alternative limitation is provided under sub. (2).

NR 217.04(1)(a)2. 2. An effluent limitation equal to 1 mg/L total phosphorus as a monthly average shall apply in cases where the discharge of wastewater from all outfalls of a facility other than those subject to ch. NR 210 contains a cumulative total of more than 60 pounds of total phosphorus per month, unless an alternative limitation is provided under sub. (2). Outfalls consisting of noncontact cooling water without phosphorus containing additives may not be included in the calculation of the cumulative total of phosphorus discharged from the facility. Compliance with the concentration limit shall be determined as a rolling 12 month average as determined by the total phosphorus from all outfalls subject to the effluent limitation for the most recent 12 months divided by the total flow for all those outfalls for the same period.

NR 217.04(1)(a)3. 3. Effluent limitations for phosphorus equal to 1 mg/L as a monthly average contained in permits on December 1, 1992 shall remain in effect.

NR 217.04(1)(a)4. 4. Effluent limitations for phosphorus equal to 85% removal of influent concentrations of phosphorus contained in permits on December 1, 1992 shall be modified to 1 mg/L total phosphorus as a monthly average upon reissuance of the permit unless an alternative limitation is provided under sub. (2).

NR 217.04(1)(a)5. 5. Runoff to surface waters from animal feeding operations shall be controlled using best management practices to achieve the purpose of this chapter pertaining to phosphorus.

NR 217.04(1)(a)6. 6. The department shall determine if a permittee is discharging more than the applicable threshold value specified in subd. 1. or 2. by examining available data on or requiring monitoring of the amount of phosphorus contained in the wastewater effluent. Such data shall be representative of the amount of phosphorus contained in the wastewater effluent during periods of discharge or operation.

NR 217.04 Note Note: The threshold values of this section will be applied at the time of WPDES permit reissuance or permit modification which may occur due to changes in waste characteristics.

NR 217.04 Note Note: See NR 102.06 in reference to water quality standards.

NR 217.04(2) (2) Alternative effluent limitations to the effluent standard for phosphorus.

NR 217.04(2)(a) (a) Permittees subject to sub. (1) (a) 1., 2., or 4. may request an alternative effluent limitation for total phosphorus if one or more of the following apply:

NR 217.04(2)(a)1. 1. A permittee may request an alternative effluent limitation in cases where achieving the 1 mg/L total phosphorus effluent standard is not practically achievable.