BLS metro-level wage data places Water and Wastewater Treatment Plant and System Operators pay in Riverside-San Bernardino-Ontario, CA at a median of $82,780 per year ($39.80/hr/hour), drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $60,020, Riverside-San Bernardino-Ontario pays +38% above, signaling either concentrated employer demand, a cost-of-living premium, or both. Approximately 1,580 water and wastewater treatment plant and system operatorss are employed across the Riverside-San Bernardino-Ontario MSA in SOC 51-8031.

The Riverside-San Bernardino-Ontario pay distribution spans from $56,870 at the 10th percentile to $112,070 at the 90th — a 2.0× 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 $66,540 and the 75th at $103,730, so half of Riverside-San Bernardino-Ontario-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 Riverside-San Bernardino-Ontario, CA 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 CA data, and peer-metro comparisons — a median is a starting point, not a ceiling.