The Permit Compliance System (PCS) is an EPA national computerized management information system that records water-discharge permit data on more than 64,000 wastewater treatment facilities nationwide. This system automates entry, updating, and retrieval of National Pollutant Discharge Elimination System (NPDES) data and tracks permit issuance, permit limits, monitoring data, and other data pertaining to facilities regulated under NPDES. There are approximately 49,000 industrial facilities and 15,000 municipal facilities regulated by NPDES. The Facility Inspection File contains data from the most recent 2-year period, regarding inspections for all active NPDES permitted facilities. For each permitted facility there may be multiple inspections and thus, multiple sets of inspections data. Data is updated twice a year.