Municipal · California · EIA 9216

Imperial Irrigation District

Municipal · California · 164K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 164 minutes/customer.

Reliability detail ↓ California utilities

Reliability verdict

Imperial Irrigation District shows above-average chronic reliability in 2023: 71 minutes SAIDI excluding major events (164 minutes including them) across 164K customers.

164 min
SAIDI 2023
0.94
SAIFI 2023
71 min
SAIDI ex-MED
164K
Customers

Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.

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Signature read: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.

What mid-pack Imperial Irrigation District filings show

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.

C+
Reliability Score
60/100
Imperial Irrigation District · 3 of 3 dimensions reported

Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.

Baseline Reliability C+ 70.7 min/yr
SAIDI excluding major-event days — day-to-day grid performance
Total Outage Duration D 164.4 min/yr
SAIDI including storms and major events — the full-year experience
Outage Frequency B- 0.94/yr
SAIFI — average number of interruptions per customer per year
SAIDI vs. national mean (341 min) 21.9%

164 minutes per customer per year

Imperial Irrigation District SAIDI

Power-out minutes per year (2023)

164 SAIDI164 SAIDINat. avg 341341SAIDI164SAIDI

Excellent

SAIDI by year (2020-2023)

Minutes per customer-year · EIA Form 861

Year-by-year SAIDI for Imperial Irrigation District from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.

Source: U.S. EIA Form 861 As of August 2026

Imperial Irrigation District SAIDI trend

0 30 60 90 120 150 180 2020 2021 2022 2023 72.1 116.2 64.5 164.4
Year-by-year SAIDI from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.

Imperial Irrigation District vs the nationwide SAIDI distribution

Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure

164 Lower than most fewer outage minutes than 50% of 911 utilities

Utilities nationwide, banded by latest reported SAIDI (minutes)

Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source U.S. EIA Form 861 reliability filings · August 2026

Price vs. reliability

Where Imperial Irrigation District sits on price vs. reliability

Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Imperial Irrigation District charges more per customer than 90% of them, and is more reliable (lower SAIDI) than 54% of them, placing it in the quadrant where it pays more and is more reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.

Imperial Irrigation District vs. a 40-utility national peer sample, price percentile vs. reliability percentile. Scatter plot of 41 data points (bubble-sized by third dimension). 050100150 050100150 Best valuePays for itCheap + riskyWorst deal Price percentile Reliability percentile Point, Price percentile: 0 · Reliability percentile: 40Point, Price percentile: 3 · Reliability percentile: 47Point, Price percentile: 5 · Reliability percentile: 43Point, Price percentile: 8 · Reliability percentile: 90Point, Price percentile: 10 · Reliability percentile: 55Point, Price percentile: 13 · Reliability percentile: 95Point, Price percentile: 15 · Reliability percentile: 22Point, Price percentile: 18 · Reliability percentile: 35Point, Price percentile: 20 · Reliability percentile: 30Point, Price percentile: 23 · Reliability percentile: 85Point, Price percentile: 25 · Reliability percentile: 12Point, Price percentile: 28 · Reliability percentile: 60Point, Price percentile: 30 · Reliability percentile: 72Point, Price percentile: 33 · Reliability percentile: 70Point, Price percentile: 35 · Reliability percentile: 7Point, Price percentile: 38 · Reliability percentile: 0Point, Price percentile: 40 · Reliability percentile: 82Point, Price percentile: 43 · Reliability percentile: 2Point, Price percentile: 45 · Reliability percentile: 32Point, Price percentile: 48 · Reliability percentile: 25Point, Price percentile: 50 · Reliability percentile: 50Point, Price percentile: 53 · Reliability percentile: 45Point, Price percentile: 55 · Reliability percentile: 97Point, Price percentile: 57 · Reliability percentile: 100Point, Price percentile: 60 · Reliability percentile: 5Point, Price percentile: 63 · Reliability percentile: 67Point, Price percentile: 65 · Reliability percentile: 52Point, Price percentile: 68 · Reliability percentile: 10Point, Price percentile: 70 · Reliability percentile: 17Point, Price percentile: 73 · Reliability percentile: 37Point, Price percentile: 75 · Reliability percentile: 87Point, Price percentile: 78 · Reliability percentile: 20Point, Price percentile: 80 · Reliability percentile: 75Point, Price percentile: 83 · Reliability percentile: 80Point, Price percentile: 85 · Reliability percentile: 15Point, Price percentile: 88 · Reliability percentile: 62Point, Price percentile: 90 · Reliability percentile: 92Point, Price percentile: 93 · Reliability percentile: 27Point, Price percentile: 98 · Reliability percentile: 77Point, Price percentile: 100 · Reliability percentile: 65Imperial Irrigation District, Price percentile: 90 · Reliability percentile: 54
Imperial Irrigation District vs. a 40-utility national peer sample, price percentile vs. reliability percentile.

Revenue per customer: $3,658/year · Latest SAIDI: 164.4 minutes/year.

SAIDI 2023 breakdown: 164.4 minutes

Reliability Trend (2020–2023)

Year SAIDI (min) SAIDI nMED SAIFI Customers
2020 72.1 58.0 0.610 157,713
2021 116.2 70.6 0.700 157,819
2022 64.5 54.5 0.720 159,216
2023 164.4 70.7 0.940 161,614

SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.

Service Area

Imperial Irrigation District serves 40 ZIP codes in California.

91934920049203692201922029220392210922119222292225922279223192232922339223692239922409224192243922449224792248922499225092251922529225392254922579225992266922709227392274922759227692277922819228392284

Frequently Asked Questions

How reliable is Imperial Irrigation District?

Imperial Irrigation District had a SAIDI of 164.4 minutes in 2023 including major weather events, but 70.7 minutes excluding them (the IEEE-standard measure of day-to-day reliability, the gap reflects a major storm that year, not chronic performance). Leaving aside major weather events, that figure comes in under the national average, pointing to above-average reliability.

What type of utility is Imperial Irrigation District?

Imperial Irrigation District is classified as a Municipal serving California.

How many customers does Imperial Irrigation District serve?

Imperial Irrigation District serves approximately 163,579 customers in California.

How has Imperial Irrigation District's reliability changed over time?

Imperial Irrigation District has 4 years of reliability data (2020-2023). SAIDI has held roughly steady across these years. Review the trend table above for year-by-year detail.

Utility Profile

Type
Municipal
State
California
Customers
163,579
Annual Revenue
$0.60B
EIA ID
9216

Explore

Utilities with similar EIA profiles

Two cross-state peer sets for Imperial Irrigation District. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.

Similar customer count

Nearest utilities by Form 861 customers (164K here), outside California.

Kentucky Power Co 163K · KY Madison Gas & Electric Co 163K · WI Empire District Electric Co 165K · AR Southern Maryland Elec Coop Inc 171K · MD

Similar chronic SAIDI

Nearest utilities by latest SAIDI minutes (164.4 here), outside California, excluding the customer-peer set.

NineStar Connect 164.5 min · IN UNS Electric, Inc 164.8 min · AZ Oregon Trail El Cons Coop, Inc 165.0 min · OR Black Hills Electric Coop, Inc 163.8 min · SD

Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.