(1) Direct discharge of pollutants to waters having a drainage area of less than 10 square miles, except that:

(2) New direct discharge of domestic pollutants to tributaries of Class-GPA waters;

(3) Any discharge into a tributary of GPA waters that by itself or in combination with other activities causes water quality degradation that would impair the characteristics and designated uses of downstream GPA waters or causes an increase in the trophic state of those GPA waters except for the following: ;

(4) Discharge of pollutants to waters of the State that imparts color, taste, turbidity, toxicity, radioactivity or other properties that cause those waters to be unsuitable for the designated uses and characteristics ascribed to their class;

(5) Discharge of pollutants to any water of the State that violates sections 465, 465-A and 465-B, except as provided in section 451; causes the "pH" of fresh waters to fall outside of the 6.0 to 8.5 range; or causes the "pH" of estuarine and marine waters to fall outside of the 7.0 to 8.5 range;

(6) New discharges of domestic pollutants to the surface waters of the State that are not conveyed and treated in municipal or quasi-municipal sewage facilities. For the purposes of this subparagraph, "new discharge" means any overboard discharge that was not licensed as of June 1, 1987, except discharges from vessels and those discharges that were in continuous existence for the 12 months preceding June 1, 1987, as demonstrated by the applicant to the department with clear and convincing evidence. The volume of the discharge from an overboard discharge facility that was licensed as of June 1, 1987 is determined by the actual or estimated volume from the facilities connected to the overboard discharge facility during the 12 months preceding June 1, 1987 or the volume allowed by the previous license, whichever is less, unless it is found by the department that an error was made during prior licensing. The months during which a discharge may occur from an overboard discharge facility that was licensed as of June 1, 1987 must be determined by the actual use of the facility at the time of the most recent license application prior to June 1, 1987 or the actual use of the facility during the 12 months prior to June 1, 1987, whichever is greater. If the overboard discharge facility was the primary residence of an owner at the time of the most recent license application prior to June 1, 1987 or during the 12 months prior to June 1, 1987, then the facility is considered a year-round residence. "Year-round residence" means a facility that is continuously used for more than 8 months of the year. For purposes of licensing, the department shall treat an increase in the licensed volume or quantity of an existing discharge or an expansion in the months during which the discharge takes place as a new discharge of domestic pollutants;

(7) After the Administrator of the United States Environmental Protection Agency ceases issuing permits for discharges of pollutants to waters of this State pursuant to the administrator's authority under the Federal Water Pollution Control Act, Section 402(c)(1), any proposed license to which the administrator has formally objected under 40 Code of Federal Regulations, Section 123.44, as amended, or any license that would not provide for compliance with applicable requirements of that Act or regulations adopted thereunder;

(8) Discharges for which the imposition of conditions can not ensure compliance with applicable water quality requirements of this State or another state;

(9) Discharges that would, in the judgment of the Secretary of the United States Army, substantially impair anchorage or navigation;

(10) Discharges that would be inconsistent with a plan or plan amendment approved under the Federal Water Pollution Control Act, Section 208(b); and

(11) Discharges that would cause unreasonable degradation of marine waters or when insufficient information exists to make a reasonable judgment whether the discharge would cause unreasonable degradation of marine waters.

(1) This paragraph does not apply to aquatic pesticide or chemical discharges approved by the department and conducted by the department, the Department of Inland Fisheries and Wildlife or an agent of either agency for the purpose of restoring biological communities affected by an invasive species.

(1-A) For the purpose of allowing the discharge of aquatic pesticides or chemicals approved by the department and conducted by the department, the Department of Inland Fisheries and Wildlife or an agent of either agency to restore resident biological communities affected by an invasive species, the department may find that the discharged effluent will not cause adverse impact to aquatic life as long as the materials and methods used do not cause a significant loss of any nontarget species and allow restoration of nontarget species. The department may find that an unavoidable, temporary loss of nontarget species does not constitute a significant loss of nontarget species.

(2) For the purpose of allowing the discharge of aquatic pesticides approved by the department for the control of mosquito-borne diseases in the interest of public health and safety, the department may find that the discharged effluent will not cause adverse impact to aquatic life as long as the materials and methods used provide protection for nontarget species. When the department issues a license for the discharge of aquatic pesticides authorized under this subparagraph, the department shall notify the municipality in which the application is licensed to occur and post the notice on the department's publicly accessible website.

(1) The 30-day average dissolved oxygen criterion of a Class C water is 6.5 parts per million using a temperature of 22 degrees centigrade or the ambient temperature of the water body, whichever is less, if:

This criterion for the water body applies to licenses and water quality certificates issued on or after March 16, 2004.

(2) In Class C waters not governed by subparagraph (1), dissolved oxygen may not be less than 6.5 parts per million as a 30-day average based upon a temperature of 24 degrees centigrade or the ambient temperature of the water body, whichever is less. This criterion for the water body applies to licenses and water quality certificates issued on or after March 16, 2004.