Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 404 - Ambient Air Quality

Chapter NR 155 as it existed on March 31, 1972 was repealed and a new chapter NR 155 was created, Register, March, 1972, No. 195, effective April 1, 1972. Chapter NR 155 was renumbered chapter NR 404, Register, July, 1985.

Note Air standards are definitions of the characteristics of ambient air quality which, in terms of present day knowledge, need to be maintained in order to protect the public health and welfare and our environment from adverse effects of air pollution.

The purpose of air standards should be viewed as goals or objectives to be achieved by these and other rules of the department, by regional implementation plans, and by enforcement programs of both state and local governments as population, industrial activity and land use changes.

The standards are meaningful for pollution control when applied to achieve and maintain desired air quality as expressed by the standards.

Because of variation in population, transportation, and industrial densities, in addition to variation in terrain and meteorology, equal air quality may not be achieved throughout a region or area.

These standards conform to national ambient air quality standards. They are subject to review as knowledge of the effects of air pollution on health, plant and animal life, property, visibility, and our environment increases.

These standards are promulgated pursuant to ch. 285, Stats., which directs the department of natural resources to undertake a comprehensive program to manage and protect the state's air resources. These rules are one part of that program.