Johnson City - (TN)

What This Utility Data Tells You

Johnson City - (TN) is a municipally-owned utility operating in Tennessee under EIA identifier 9777. It reports service to approximately 83,278 customer accounts and generated about $0.21 billion in annual electric revenue, with a service footprint spanning 6 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 Johnson City - (TN) customer experienced 107.2 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. SAIFI — the average number of outage events per customer — was 1.04 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 39.6 minutes — the gap between that figure and the headline 107.2 reveals how much weather, not day-to-day infrastructure, drove outages.

The EIA dataset includes 4 years of continuous reporting (2020–2023) for Johnson City - (TN), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has increased from 29.6 to 107.2 minutes, which may reflect either worsening weather exposure or delayed grid modernization. All figures on this page come directly from EIA Form 861, the federal annual electric power industry survey, with service territory ZIPs sourced from OpenEI — you can cross-reference them with your own utility bill or use them when comparing providers before relocating.