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NR 493.02 HistoryHistory: Cr. (intro.) and (2), (1) renum. from NR 154.01 (10), Register, September, 1986, No. 369, eff. 10-1-86; am. (intro.), r. (2), Register, December, 1995, No. 480, eff. 1-1-96.
NR 493.03NR 493.03 Episode levels.
NR 493.03(1)(1) Air episode advisory. The department may issue an Air Pollution Episode advisory to the general public if any air contaminant or combination of air contaminants reaches the respective level of concentration specified in Table 1 at any monitoring site.
NR 493.03(2)(2) Air episode levels. The department shall declare an Air Pollution Episode Level at the “Alert”, “Warning” or “Emergency” stage if any air contaminant or combination of air contaminants reaches the respective level of concentration specified in Table 1 at any monitoring site and if meteorological conditions are such that the concentrations of the air contaminant can be expected to remain at or above that level for 12 or more hours, or in the case of ozone, to recur the following day at the same or a higher level, unless control actions are taken.
NR 493.03 HistoryHistory: Cr. Register, July, 1985, No. 355, eff. 8-1-85; renum. from NR 493.01, Register, September, 1986, No. 369, eff. 10-1-86.
Table 1
Episode Stage Criteria For Air Contaminants
- See PDF for table PDF
NR 493.04NR 493.04 Emission control action programs.
NR 493.04(1)(1) Any person responsible for the operation of a direct source which emits 0.25 tons or more per day of any air contaminant for which air standards have been adopted shall prepare emission control action programs, consistent with good industrial practice and safe operating procedures, for reducing the emission of the air contaminants into the outdoor atmosphere during periods of an AIR POLLUTION ALERT, AIR POLLUTION WARNING, or AIR POLLUTION EMERGENCY declared under s. NR 493.03 (2). Emission control action programs shall be designed to reduce or eliminate emissions of air contaminants into the outdoor atmosphere in accordance with the requirements set forth in Tables 2 to 6.
NR 493.04(2)(2) Emission control action programs as required under sub. (1) shall be in writing and show the source of air contamination, the approximate amount of reduction of contaminants, the approximate time required to put the program into effect, a brief description of the manner in which the reduction will be achieved during each stage of an air pollution episode declared under s. NR 493.03 (2), and such other information as the department deems pertinent.
NR 493.04(3)(3) The emission control action programs as required by sub. (1) shall be made available at all times on the premises of the operation to any person authorized to enforce the provisions of the department’s episode procedure. A brief written description of the overall emission control action program, and the details of the program which affect specific functions of the overall operation, shall be posted at the locations where the functions are carried out.
NR 493.04(4)(4) The emission control action programs as required by sub. (1) shall be submitted to the department upon request within 60 days of the receipt of the request; the emission control action programs shall be subject to review and approval by the department. If, in the opinion of the department, an emission control action program does not effectively carry out the requirements set forth in Tables 2 to 6, the department may disapprove the emission control action program, state its reason for disapproval, and order the preparation of an amended emission control action program within the time period specified in the order. If the person responsible fails within the time period specified in the order to submit an amended emission control action program which, in the opinion of the department, meets the requirements of this chapter, the department may revise the emission control action program. The revised program will thereafter be the emission control action program which the person responsible shall put into effect upon declaration of an air pollution episode by the secretary.
NR 493.04 HistoryHistory: Renum. from NR 154.20 (2) and am. Register, July, 1985, No. 355, eff. 8-1-85; renum. from NR 493.02, Register, September, 1986, No. 369, eff. 10-1-86; am. (2) and (3), Register, December, 1995, No. 480, eff. 1-1-96; correction in (1) and (4) made under s. 13.93 (2m) (b) 7., Stats., Register, December, 1995, No. 480; am. (2), Register, January, 1997, No. 493, eff. 2-1-97.
NR 493.05NR 493.05 Episode orders. The following are orders which may be appropriate for use by the secretary under s. 285.85, Stats., upon declaration under s. NR 493.03 (2) that an air pollution episode exists for any air contaminant for which an air standard has been adopted or for any combination of air contaminants:
NR 493.05(1)(1) Air pollution alert.
NR 493.05(1)(a)(a) Any air contaminant or combination of air contaminants. Any person responsible for the operation of a source of air contamination as set forth in s. NR 493.04 (1) shall take all AIR POLLUTION ALERT actions as required for such source of air contamination, and shall particularly put into effect the emission control action program for an AIR POLLUTION ALERT declared under s. NR 493.03 (2).
NR 493.05(1)(b)(b) Particulate matter.
NR 493.05(1)(b)1.1. No person may open burn any tree wastes, vegetation, refuse, or debris in any form.
NR 493.05(1)(b)2.2. The use of incinerators for the disposal of any form of solid waste shall be limited to the hours between 12:00 noon and 4:00 p.m.
NR 493.05(1)(b)3.3. Persons operating fuel-burning equipment which requires intermittent boiler lancing or soot blowing shall perform such operations, to the maximum extent possible, between the hours of 12:00 noon and 4:00 p.m.
NR 493.05(1)(c)(c) Nitrogen oxides.
NR 493.05(1)(c)1.1. No person may open burn any tree waste, vegetation, refuse, or debris in any form.
NR 493.05(1)(c)2.2. The use of incinerators for the disposal of any form of solid waste shall be limited to the hours between 12:00 noon and 4:00 p.m.
NR 493.05(2)(2) Air pollution warning.
NR 493.05(2)(a)(a) Any air contaminant or combination of air contaminants. Any person responsible for the operation of a source of air contamination as set forth in s. NR 493.04 (1) shall take all AIR POLLUTION WARNING actions as required for such source of air contamination, and shall particularly put into effect the emission control action program for an AIR POLLUTION WARNING declared under s. NR 493.03 (2).
NR 493.05(2)(b)(b) Particulate matter.
NR 493.05(2)(b)1.1. No person may open burn any tree waste, vegetation, refuse, or debris in any form.
NR 493.05(2)(b)2.2. No person may use incinerators for the disposal of any form of solid waste or liquid waste.
NR 493.05(2)(b)3.3. Persons operating fuel-burning equipment which requires intermittent boiler lancing or soot blowing shall perform such operations, to the maximum extent possible, between the hours of 12:00 noon and 4:00 p.m.
NR 493.05(2)(c)(c) Nitrogen oxides.
NR 493.05(2)(c)1.1. No person may open burn any tree waste, vegetation, refuse, or debris in any form.
NR 493.05(2)(c)2.2. No person may use incinerators for the disposal of any form of solid waste or liquid waste.
NR 493.05(3)(3) Air pollution emergency.
NR 493.05(3)(a)(a) Any air contaminant or combination of air contaminants.
NR 493.05(3)(a)1.1. Any person responsible for the operation of a source of air contamination set forth in s. NR 493.04 (1) shall take all AIR POLLUTION EMERGENCY actions as required for such source of air contamination, and shall particularly put into effect the emission control action program for an AIR POLLUTION EMERGENCY declared under s. NR 493.03 (2).
NR 493.05(3)(a)2.2. All manufacturing establishments, including those too small to be included under s. NR 493.04 (1), shall institute such action as will result in maximum reduction of air contaminants from their operations by ceasing, curtailing, or postponing operations which emit air contaminants to the extent possible without causing injury to persons or damage to equipment.
NR 493.05(3)(a)3.3. All places of employment described in this subdivision shall immediately cease operations except for those operations necessary to provide emergency services or products or to prevent personal injury or property loss or damage:
NR 493.05(3)(a)3.a.a. Mining and quarrying of nonmetallic minerals.
NR 493.05(3)(a)3.b.b. All contract construction work.
NR 493.05(3)(a)3.c.c. Wholesale trade establishments which are primarily engaged in selling merchandise to retailers, to industrial, commercial, institutional or professional users, or to other wholesalers, or acting as agents in buying merchandise for or selling merchandise to such persons or companies.
NR 493.05(3)(a)3.d.d. All offices of local, county, and state government and any other public body, except for those offices providing emergency services such as fire or police protection, medical services, or protection of public health and the environment, and those offices that must continue to operate in order to enforce the requirements of this order.
NR 493.05(3)(a)3.e.e. All retail trade establishments, except pharmacies and stores primarily engaged in the sale of food.
NR 493.05(3)(a)3.f.f. Banks, credit agencies, securities and commodities brokers, dealers, exchanges and services, offices of insurance carriers, agents and brokers, and real estate offices.
NR 493.05(3)(a)3.g.g. Wholesale and retail dry cleaners, photographic studios, beauty shops, barber shops, shoe repair shops and other establishments providing personal services.
NR 493.05(3)(a)3.h.h. Business services such as advertising offices, consumer credit reporting agencies, copying, duplicating, mailing, stenographic services, equipment rental services and commercial testing laboratories.
NR 493.05(3)(a)3.i.i. Auto body shops, vehicle paint shops and car washes.
NR 493.05(3)(a)3.j.j. Establishments rendering amusement and recreation services, including motion picture theaters.
NR 493.05(3)(a)3.k.k. Elementary and secondary schools, colleges, universities, professional schools, junior colleges, vocational schools, and public and private libraries.
NR 493.05(3)(a)4.4. No person may open burn any tree waste, vegetation, refuse or debris in any form.
NR 493.05(3)(a)5.5. No person may use incinerators for the disposal of any form of solid or liquid waste.
NR 493.05(3)(a)6.6. No person may use a motor vehicle except as necessary to provide or obtain emergency services or products or to prevent personal injury or property loss or damage.
NR 493.05(4)(4) Episode action. When the secretary determines that an air pollution episode condition exists at one or more monitoring sites solely because of emissions from a limited number of sources, the secretary may order such source or sources to put into effect the emission control action programs which are applicable for each episode stage.
NR 493.05 HistoryHistory: Renum. from NR 154.20 (3) and am. Register, July, 1985, No. 355, eff. 8-1-85; renum. from NR 493.03, Register, September, 1986, No. 369, eff. 10-1-86; am. (3) (a) 2. and 3. intro., 2., 4., g. and h., 6. and Table 5, r. and recr. (3) (a) 3. i., Register, May, 1992, No. 437, eff. 6-1-92.
- See PDF for table PDF
- See PDF for table PDF


Table 4
Emission Reduction Requirements For Nitrogen Oxides
- See PDF for table PDF
Table 5
Emission Reduction Requirements For Volatile Organic Compounds For Control Of Ozone
- See PDF for table PDF


Table 6
Emission Reduction Requirements For Carbon Monoxide
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.