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Upper Santa Margarita Irrigated Lands Group Welcome to USMILG Welcome to USMILG Welcome to USMILG Welcome to USMILG Featured About Upper Santa Margarita Irrigated Lands Group USMILG The Upper Santa Margarita Irrigated Lands Group is a 501c3 nonprofit organization that was formed in 2010 and approved for third party group status with the Regional Board. USMILG is aligned with Service Area Map San Diego Regional Water Quality Control Board is requiring all agricultural operations within its jurisdiction to abide by their General Order R92016004. This order is for production agriculture Contact Us We look foward to hearing from you. Quicklinks Quicklinks Enroll in USMILG NOI Pay Fees Here Forms Copyright 2025 Upper Santa Margarita Irrigated Lands Group PO Box 893340 Temecula CA 92589 Telephone909 2087847 Website Accessibility Statement District Transparency Powered byStreamlineSign in Search results Website Accessibility Statement Upper Santa Margarita Irrigated Lands Group the District is committed to ensuring that its services are accessible to all members of the public.