Integrated Report and Total Maximum Daily Loads

Clean Water Act 303(d) List

On August 16, 2018, the U.S. Environmental Protection Agency (EPA) approved the 2018 State of Hawaii Water Quality Monitoring and Assessment Report.  This report provides a single, integrated submittal for fulfilling federal requirements under Sections (§) 303(d) and 305(b) of the Clean Water Act.  With this approval, the 2018 303(d) List of Impaired Waters (represented by those water bodies assigned to categories 4 and 5 in Chapter 3, 2018 §303(d) and §305(b) Water Body Assessments for Hawaii), is now in effect.

Current & Prior Reports

2018 State of Hawaii Water Quality Monitoring and Assessment Report

2016 State of Hawaii Water Quality Monitoring and Assessment Report

2014 State of Hawaii Water Quality Monitoring and Assessment Report

2010 and older reports can be found in our Library

The Total Maximum Daily Load (TMDL) Process

The TMDL process serves as a roadmap for water body restoration by focusing on improving water quality in impaired surface waters identified in the biennial State of Hawaii Water Quality Monitoring and Assessment Report. TMDLs identify sources of pollution within a watershed and determine pollutant load reductions required for a water body to meet water quality standards. The TMDL process is a vital component of implementing water quality improvement projects under Clean Water Act Section 319(h) grants, administered by the Department of Health, Polluted Runoff Control Program.

Additional information on TMDLs can be found on the U.S.Environmental Protection Agency TMDL website.


Turbidity, Sediment and Nutrient TMDL for the Waikele Watershed, Oahu, Hawaii

The TMDLs for the Waikele watershed have formally been accepted by EPA as of May 9, 2019. The following links provide downloads of the TMDL, TMDL Checklist, and TMDL EPA Acceptance letter.

https://health.hawaii.gov/cwb/files/2019/06/Waikele-TMDL-2019.pdf

https://health.hawaii.gov/cwb/files/2019/06/Waikele-TMDL_Checklist_May-9-2019.pdf

https://health.hawaii.gov/cwb/files/2019/06/Waikele-TMDL_Approval-Letter_May-9-2019.pdf

 


 

TMDL Technical Reports and Implementation Plans for approved TMDLs

For the DOH Submittal Letter, EPA Approval Letter, and the EPA Review Checklist, please contact Clean Water Branch.

 

KANEOHE STREAM, OAHU

UPPER KAUKONAHUA STREAM, OAHU

NAWILIWILI, KAUAI

HANALEI, KAUAI

KAPAA, OAHU

KAWA, OAHU

WAIMANALO, OAHU

ALA WAI, OAHU