This document describes the air monitoring strategy for State implementation plans developed by the Standing Air Monitoring Work Group (SAMWG). It presents a summary of their review and evaluation of current air monitoring activities. A discussion of SAMWG's findings and their resulting air monitoring strategy for State implementation plan monitoring is described. The major topics discussed in the strategy are: (1) Ambient monitoring, (2) Source monitoring, (3) Future monitoring for non-criteria pollutants, (4) Quality assurance activities for ambient and source monitoring, (5) Analysis and interpretation of air quality information, (6) Anticipated impact of the strategy, and (7) Implementation of the strategy. It was anticipated that the resources associated with air monitoring activities would not change substantially in the near future. Thus the strategy recommends a reallocation of the local monitoring resources so that the overall result will be a more cost-effective monitoring program. A phased implementation approach is also suggested in order to minimize the resource impact of the recommendations in any one year. However, the strategy emphasizes that even with a phased approach, implementation of the recommendations will require more resources, especially for expanded quality assurance programs and the purchase of new instruments to replace obsolete or unacceptable analyzers.