Designers & Contractors

What You Need to Know for Construction Projects

Construction projects generally require ground disturbing activities and the use of various types of materials (e.g., paint, fertilizer, etc.), all of which culminates in these projects posing a higher risk to stormwater quality. 

Ground that has been disturbed by construction and left unstabilized can be easily eroded by rain or runoff. As a result, stormwater runoff from construction sites can cause significant harm to our streams and coastal waters.

To mitigate the potential pollution associated with construction projects stormwater best management practices (BMPs) are employed. These practices help to reduce the risk of storm water pollution and help keep our oceans clean. Below you will find BMP related resources for contractors and project designers.

Step 1: Check If Permits Are Needed for Your Project

BEFORE STARTING WORK on any construction project (for HWY-M or within HWY-M rights-of-way), ask yourself these questions below. If you answer “YES” to any of the following questions, you will need a permit in order to start work:

CriteriaPermits NeededAdditional FormsBMP Plan

1. Am I working within HWY-M right-of-way?


2. Will my project discharge into an HWY-M storm drain? (even if the project does not have construction activities within HWY-M Right-of-Way)


3. Will my project connect to an HWY-M storm drain?


4. Does my project disturb an acre or more of land?

  • National Pollutant Discharge Elimination System General Permit Coverage or Individual Permit Coverage

(Get it on the State of Hawaii Department of Health, Clean Water Branch site)

Not Required