BLS metro-level wage data places Stationary Engineers and Boiler Operators pay in Riverside-San Bernardino-Ontario, CA at a median of $87,170 per year ($41.91/hr/hour), drawn from the OEWS May 2025 release for this Metropolitan Statistical Area. Compared to the national median of $78,620, Riverside-San Bernardino-Ontario pays +11% above, signaling either concentrated employer demand, a cost-of-living premium, or both. Approximately 370 stationary engineers and boiler operatorss are employed across the Riverside-San Bernardino-Ontario MSA in SOC 51-8021.

The Riverside-San Bernardino-Ontario pay distribution spans from $47,450 at the 10th percentile to $128,090 at the 90th — a 2.7× 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 $58,400 and the 75th at $104,020, so half of Riverside-San Bernardino-Ontario-based stationary engineers and boiler 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.