Honolulu begins $417M secondary treatment upgrade at Sand Island wastewater plant

Phase 1 of the Sand Island Wastewater Treatment Plant secondary treatment installation is underway, a $417 million project treating 20 million gallons per day, with completion on track for 2026.

“Construction has reached the halfway point on Phase 1 of the Sand Island secondary treatment installation: a $417-million, five-year project that will treat 20 million gallons per day of SIWWTP's total 90-mgd capacity.”enr.com

• 1 source
• enr.comAdvanced Water Treatment Finds Resilient Footing | Engineering News-RecordL.L. PoirierJun 11, 2024

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