Current Wastewater Reports and Notifications

Investigation of Cesspool Upgrade Alternatives in Upcountry Maui


A report prepared for the Hawaii Department of Health, Safe Drinking Water Branch to examine the issues, data requirements and possible alternatives to aid stakeholders in making more informed decisions in meeting the state’s 2050 cesspool closure requirements in this Priority 1 Cesspool Upgrade Area.

Dental Amalgam Rule Taking Effect 


Pursuant to Code of Federal Regulations Title 40 Part 441 (40 CFR Part 441), dental offices that discharge to a sewer connected to a publicly owned treatment works (i.e. Lahaina, Kihei or Wailuku-Kahului, Lanai or Kaunakakai Wastewater Treatment Facilities) are required to use Amalgam Separators and to implement Best Management Practices as recommended by the American Dental Association (ADA). ALL EXISTING SOURCES subject to the rule must comply with the standards and file reports with the State of Hawaii, Department of Health Clean Water Branch by July 14, 2020.

Supreme Court of the United States Case Opinion Lahaina WWRF


County of Maui, Hawaii, vs. Hawaii Wildlife Fund et al.
Syllabus, Opinion of the Court, concurring and dissenting opinions released on April 23, 2020.

Countywide WWRF Land Treatment Study


A study investigating the feasibility of land treatment to replace/augment the use of injection wells for unused treated wastewater effluent.

Kihei Wastewater Reclamation Facility Nitrogen Removal Alternatives Study 


This study evaluates treatment process modifications that could be potentially implemented to reduce the volume of nitrogen in the final treated effluent that is utilized as R-1 recycled water by customers or discharged into injection wells.

Wailuku-Kahului WWRF Septage Receiving Station Rehabilitation 


An engineering report to develop a preliminary design for the potential upgrade and reopening of the septage receiving station located at the Wailuku-Kahului Wastewater Reclamation Facility (WWRF.)

Maalaea Bay Coral Reef Study


An investigative study to (1) identify point and non-point pollution and nutrient sources that may have led to declines in coral health and complexity of the benthic community; and (2) characterize nutrient composition of the waters of Maalaea Bay. The results of the study indicate that while the private injection wells are likely causing some enhanced algal growth in the shallow inner bay, they do not appear to be a cause of the observed declines in coral communities.
Study Results

Recycled Water Verification Studies


Recent studies which depict potential new users of recycled water and the costs associated with providing the required infrastructure: