2022 SWMPP Overview

The Public Education and Outreach Program (Public Education Program) is designed to strategically target specific audiences, through various mediums and events, in order to educate the public about the need to “Protect Our Water.” Clean water requires a joint public effort, and the Public Education Program strives to provide education, as well as include the public in DOT-HWYS storm water management efforts

DOT-HWYS primary public service campaign is the Adopt-A-Highway Program, a public service program in which participants commit to pick up litter along Oahu’s state highways, as show here. This map shows adopted vs. available Adopt-A-Highway Segments.

The Illicit Discharge Detection and Elimination Program (IDDE Program) is designed to detect and eliminate illegal connections and illicit discharges into the MS4 to the MEP.

The Construction Site Runoff Control Program (Construction Program) is designed to reduce to the MEP the discharge of pollutants from both private (encroachment) and public (contract and maintenance) construction projects.

The Post-Construction Storm Water Management in New Development and Redevelopment Program (Post-Construction Program) is designed to ensure that all private and public projects are reviewed for consistency with the criteria that requires the inclusion of post-construction BMPs to prevent or minimize water quality impacts to the MEP.

The Pollution Prevention/Good Housekeeping (PP/GH) Program is designed to develop and maintain a system maintenance program to reduce to the MEP the discharge of pollutants from facilities, roads, parking lots, baseyards, maintenance facilities, and the MS4. 

Industrial and commercial facilities adjacent to DOT-HWYS rights-of-way have the potential to discharge pollutants into the MS4 due to their proximity and the nature of their business operations. The Industrial and Commercial Activities Discharge Management Program (Industrial and Commercial Program) conducts inspections of facilities and activities that initially discharge into the MS4, tracks pertinent information, and implements enforcement policies in order to reduce the discharge of pollutants associated with industrial and commercial facilities and activities to the MEP. The Industrial and Commercial Program is administered in conjunction with the IDDE Program, with which it shares common objectives, policies, and personnel.

DOT-HWYS owns and operates five baseyard facilities (Keehi, Kakoi, Pearl City, Waianae, and Windward Baseyards) on Oahu that are subject to the MS4 NPDES Permit requirements. The Baseyard Facilities Program takes a deliberate approach to assessing the source and type of potential pollutants associated with operations conducted at baseyard facilities and strategically implements the BMPs necessary to reduce the discharge of pollutants from baseyards and related maintenance activities to the MEP. HWY-OM is responsible for implementing and overseeing the Baseyard Facilities Program.

The purpose of the Monitoring Program is to assess the effectiveness of the SWMP in meeting MS4 NPDES Permit requirements. Monitoring activities conducted under this program are designed to characterize storm water discharges from the MS4, identify sources of pollutants, detect and eliminate illicit discharges and illegal connections and to assess impacts to receiving waters and watersheds.

The purpose of the TMDL Program is to continue to implement BMPs to meet annual or seasonal waste load reductions where compliance has been attained, comply with the Schedules of Compliance where compliance has not yet been attained, and submit TMDL Implementation and Monitoring Plans (I&M Plans) for up to one additional TMDL per year following adoption by DOH and approval by EPA. TMDL compliance is assessed on a watershed scale through quantitative analyses of the waste load reductions required for pollutants of concern identified in each TMDL. The TMDL Program relies on the effective implementation of BMPs by SWMP program elements (e.g., Debris Control Program, Erosion Control Program, etc.) to attain and demonstrate compliance with waste load reductions for TMDL watersheds.

The following TMDL Program activities are implemented in order to comply with the MS4 NPDES Permit; applicable water quality standards; and the waste load allocations (WLAs) for the  Ala Wai Canal ,  Kawa Stream ,  Waimanalo Stream ,  Kapaa Stream ,  Kaneohe Stream , and  Waikele Stream  watersheds.