Clean Water Act 303(d) List
On July 24, 2012, the U.S. Environmental Protection Agency (EPA) approved the 2008/10 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 2008/10 303(d) List
of Impaired Waters (represented by those waterbodies assigned to Categories 4 and 5 in Chapter
3, 2008/10 Water Body Assessment Decisions), is now in effect.
2008/2010 State of Hawaii Water Quality Monitoring and Assessment Report
2006 State of Hawaii Water Quality Monitoring and Assessment Report
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
. 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.
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
ALA WAI, OAHU