PUD No 3 of Mason County

What This Utility Data Tells You

PUD No 3 of Mason County is a municipally-owned utility operating in Washington under EIA identifier 15419. It reports service to approximately 35,985 customer accounts and generated about $0.08 billion in annual electric revenue, with a service footprint spanning 19 ZIP codes. As a municipal utility, it is typically governed by a local board or city council and is exempt from federal income tax.

In 2023, the average PUD No 3 of Mason County customer experienced 247.8 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). That sits within the 120–180 minute national benchmark range, indicating performance typical of U.S. distribution utilities. Over the same period, SAIFI (outage events per customer) was 1.10, putting the typical customer at roughly 1 distinct interruption that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 210.5 minutes; the difference from the headline 247.8 shows how much of the outage total came from weather rather than everyday grid issues.

The EIA dataset includes 4 years of continuous reporting (2020–2023) for PUD No 3 of Mason County, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 452.1 to 247.8 minutes over that window, a meaningful direction for prospective customers and regulators watching capital investment outcomes.