Storm Water Information Stormwater Rules & RegulationsStormwater Public Viewer of Granby GISSanitary Sewer Regulations AttachmentSize PSA-Pet Waste270.23 KB Other Storm Water Regulations-NPDES MS4374.68 KB Zoning Storm Water -NPDES MS4809.18 KB Subdivision Regulations-Stormwater-NPDES MS41.24 MB Stormwater Retrofit Plan-Granby-2021081210.29 MB Granby NSIP Retrofit Memo-20220203474.67 KB Nitrogen-source-id report-Granby-Final-7-8-21271.94 KB Draft Granby Operation and Maintenance Plan8.51 MB -Part 1-Draft Stormwater Management Program (SWMP0-EPA NPDES Permit # MA0410079.72 MB -Part 2-Draft Stormwater Management Program (SWMP0-EPA NPDES Permit # MA04100715.36 MB Granby Highway Facility's Draft SWPPP8.71 MB MS4 Compliance - Dry Weather Outfall and Interconnection Sampling-6-01-2020132.04 KB Outfall Catchment System Vulnerability Factor (SVF) Inventory 1-28-2119.37 KB MS4 Catchment Investigations-03-18-2021323.12 KB