Imperial Irrigation District

What This Utility Data Tells You

Imperial Irrigation District is a municipally-owned utility operating in California under EIA identifier 9216. It reports service to approximately 163,579 customer accounts and generated about $0.60 billion in annual electric revenue, with a service footprint spanning 40 ZIP codes. Municipal ownership means a local board or city council typically oversees this utility, and it is exempt from federal income tax.

In 2023, the average Imperial Irrigation District customer experienced 164.4 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that is comfortably under the 120–180 minute national benchmark range, a sign of solid grid resilience and quick outage response. Over the same period, SAIFI (outage events per customer) was 0.94, putting the typical customer at roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 70.7 minutes, the gap between that figure and the headline 164.4 reveals how much weather, not day-to-day infrastructure, drove outages.

The EIA dataset includes 4 years of continuous reporting (2020–2023) for Imperial Irrigation District, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has increased from 72.1 to 164.4 minutes, which may reflect either worsening weather exposure or delayed grid modernization.