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 Enforcement Action File contains information regarding actions taken in the most recent 2-year period, in response to violations of effluent parameters limits, non-receipt of Discharge Monitoring Reports (DMRs) or Compliance Schedule reports, or failure to complete Compliance Schedule milestones for all active permitted facilities. Enforcement action data include the events in violation and the dates of occurrence, the type of enforcement action(s), and the dates they were taken, and the current status of each action. This data is updated twice a year.