401 KAR 55:005. Significant harm criteria

Section 1. Purpose. Notwithstanding any other provision of the administrative regulations of the Division for Air Quality, this chapter is designed to prevent ambient pollutant concentrations at any location from reaching the following levels which could cause significant harm to the health of persons. (1) Sulfur dioxide: 2,620 micrograms per cubic meter (1.0 ppm), twenty-four (24) hour average. (2) Particulate: matter, measured as PM 10 : 600 micrograms per cubic meter, twenty-four (24) hour average. (3) Carbon monoxide: 57.5 milligrams per cubic meter (fifty (50) ppm), eight (8) hour average. 86.3 milligrams per cubic meter (seventy-five (75) ppm), four (4) hour average. 144 milligrams per cubic meter (125 ppm), one (1) hour average. (4) Ozone: 1,200 micrograms per cubic meter (0.6 ppm), one (1) hour average. (5) Nitrogen dioxide: 3,750 micrograms per cubic meter (two (2.0) ppm), one (1) hour average. 938 micrograms per cubic meter (five-tenths (0.5) ppm), twenty-four (24) hour average.