Chapter NR 207

ANTIDEGRADATION AND ANTIBACKSLIDING

Subchapter I — Antidegradation

NR 207.01   Purpose and applicability.

NR 207.02   Definitions.

NR 207.03   Antidegradation evaluation procedure.

NR 207.04   Fish and aquatic life waters.

NR 207.05   Determining significant lowering of water quality.

Subchapter II — Antibacksliding

NR 207.10   Purpose and applicability.

NR 207.11   Definitions.

NR 207.12   Antibacksliding.

Ch. NR 207 Note Note: Corrections made under s. 13.93 (2m) (b) 7., Stats., Register, August, 1997, No. 500.

subch. I of ch. NR 207 Subchapter I — Antidegradation

NR 207.01 NR 207.01 Purpose and applicability.

NR 207.01(1) (1) Purpose. The purpose of this subchapter is to establish implementation procedures for the antidegradation policy in s. NR 102.05 (1) (a). This subchapter sets procedures applicable to proposed new or increased discharges to outstanding resource waters, exceptional resource waters, Great Lakes system waters, fish and aquatic life waters, and waters listed in tables 3 through 8 in ss. NR 104.05 to 104.10.

NR 207.01(2) (2) Applicability. This subchapter applies to any person proposing to increase an existing discharge or create a new discharge to the surface waters of the state.

NR 207.01 History History: Cr. Register, February, 1989, No. 398, eff. 3-1-89; am. (1), Register, August, 1997, No. 500, eff. 9-1-97; CR 17-002: am. Register April 2018 No. 748, eff. 5-1-18.

NR 207.02 NR 207.02 Definitions. In addition to the definitions in ch. NR 205, the following definitions apply to this chapter:

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.

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 207.02(3) (3) “Exceptional resource waters” means any surface water, or portion thereof, in s. NR 102.11.