JAKARTA, Aug 5 (Reuters) - Indonesia's foreign exchange reserves fell by $4.2 billion last month to reach $132.2 billion at the end of July due to payments of public debt and the central bank's currency intervention measures, Bank Indonesia (BI) said on Friday.

The reserve level was equal to imports for 6.2 months, above an international standard of 3 months of imports, and was adequate to maintain Indonesia's external and financial system stability, BI said in a statement. (Reporting by Gayatri Suroyo; Editing by Kanupriya Kapoor)