This powerpoint presentation presents the Unregulated Contaminant Monitoring Rule 2 (UCMR2). Topics outlined include: reasons for development; requirements of the rule; implementation; State roles in the rule; minimizing cost of compliance; sampling plan and schedule modification; laboratory issues; Frequently Asked Questions; Safe Drinking Water Accession and Review System (SDWARS); expectations for UCMR3; and, key differences between UCMR1 and UCMR2.