Small Municipal Separate Storm Sewer System (MS-4) Program

According to the Hawai’i Department of Education (HIDOE), the Small Municipal Separate Storm Sewer System Program, also known as MS-4, is the program designed to raise awareness and improve our water resource management and maintenance as the most urban-dense populated island in the island chain, O’ahu.


This page lists a document of PDF resources on responsible water management and minimizing pollution in to our sewer systems, along with activities you may printout to learn more!