Water and Wastewater Treatment Plant and System Operators Salary in Hawaii

Water and wastewater treatment plant and system operators in Hawaii earn the most in Honolulu (average $65,010 a year) and the least in Kahului ($63,200), across the 2 Hawaii metro areas we cover. Statewide, BLS puts the water and wastewater treatment plant and system operators average at $64,550 and the median at $65,560 for 610 workers. The U.S. average for this job is $62,540.

Water and Wastewater Treatment Plant and System Operators average salary by city in Hawaii

Honolulu$65,010
Kahului$63,200

Pay, take-home pay and cost of living

City	Average	Median	25th pct.	Take-home*	Cost of living
Honolulu	$65,010	$67,840	$52,150	$51,279	111
Kahului	$63,200	$60,910	$56,330	$49,962	109

*Average salary after federal and state taxes for a single filer; Hawaii's top brackets above $125,000 follow Act 46 (2024). Cost of living: BEA price parity, U.S. = 100.

Water and Wastewater Treatment Plant and System Operators salary in other states

Water and Wastewater Treatment Plant and System Operators salary by city and state

More about pay in Hawaii

Sources and how to read this page

Wages: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS), May 2025 estimates for metropolitan areas. SOC code 51-8031.
U.S. and statewide figures: BLS OEWS national and state estimates, May 2025, every employer including rural areas.
Cost of living: Bureau of Economic Analysis regional price parities (RPP), 2024; 100 = U.S. average.

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