Porth Isallt-bach, Isle of Anglesey

• Built-Up Area: Trearddur
• Parish/Community: Trearddur
• Unitary Authority: Isle of Anglesey
• Region: Wales

• Category: Water Feature
• Type: Bay

• Latitude/Longitude: 53°16'46"N 4°37'34"W
• Eastings/Northings: 224993, 379060
• OS Grid: SH249790
• Mapcode Local: GBR GNY1.3L1
• Mapcode Global: WH31B.XT4N

Location and coordinates are for the approximate centre of Porth Isallt-bach within this administrative area. Geographic features and populated places may cross administrative borders.