BLS metro-level wage data places Water and Wastewater Treatment Plant and System Operators pay in Gulfport-Biloxi, MS at a median of $46,550 per year ($22.38/hr/hour), drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $60,020, Gulfport-Biloxi pays 22% below, which typically tracks with a lower local cost of living or smaller specialized-employer cluster. Approximately 230 water and wastewater treatment plant and system operatorss are employed across the Gulfport-Biloxi MSA in SOC 51-8031.

The Gulfport-Biloxi pay distribution spans from $36,920 at the 10th percentile to $64,420 at the 90th — a 1.7× spread that reflects experience tenure, specialization, employer size, and the difference between public-sector, nonprofit, and private-sector compensation inside the metro. The 25th percentile sits at $37,870 and the 75th at $53,330, so half of Gulfport-Biloxi-based water and wastewater treatment plant and system operatorss earn within that middle band.

Metro figures capture where you actually work, not just where you live — which matters for commuters. BLS draws metro boundaries from the OMB MSA definitions, so Gulfport-Biloxi, MS covers the central city plus outlying counties tied to the metro economically. Remember that OEWS wages reflect base pay only: employer-provided health insurance, retirement matches, stock options, signing bonuses, overtime, and tips are excluded and can add 20-40% to real total compensation. Before using this metro median as a negotiation anchor, triangulate against the same occupation's national profile (linked below), its state-wide MS data, and peer-metro comparisons — a median is a starting point, not a ceiling.