IOU · Missouri · EIA 19436
Union Electric Co - (MO)
IOU · Missouri · 1.3M customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 480 minutes/customer.
Reliability verdict
Union Electric Co - (MO) shows above-average chronic reliability in 2023: 93 minutes SAIDI excluding major events (480 minutes including them) across 1.3M customers.
- 480 min
- SAIDI 2023
- 1.18
- SAIFI 2023
- 93 min
- SAIDI ex-MED
- 1.3M
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: long interruption minutes vs the 911 utility cohort (>258 min tercile cut).
What long-outage Union Electric Co - (MO) filings show
Union Electric Co - (MO) is an investor-owned utility operating in Missouri under EIA identifier 19436. It reports service to approximately 1,254,162 customer accounts and generated about $3.18 billion in annual electric revenue, with a service footprint spanning 500 ZIP codes. As an investor-owned utility, it operates under state public utility commission oversight that reviews rate cases and reliability performance.
In 2023, the average Union Electric Co - (MO) customer experienced 480.0 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that keeps this utility below the typical 120–180 minute national benchmark, consistent with a well-hardened distribution system and fast restoration crews. Over the same period, SAIFI (outage events per customer) was 1.18, putting the typical customer at roughly 1 distinct interruption that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 93.0 minutes; the difference from the headline 480.0 shows how much of the outage total came from weather rather than everyday grid issues.
Union Electric Co - (MO) has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. SAIDI climbed from 155.0 to 480.0 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.
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.
480 min/year per customer
Annual minutes without electric service (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Union Electric Co - (MO) from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Union Electric Co - (MO) SAIDI trend
Union Electric Co - (MO) vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
480 Higher than most fewer outage minutes than 18% 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 Union Electric Co - (MO) sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Union Electric Co - (MO) charges more per customer than 49% of them, and is more reliable (lower SAIDI) than 21% of them, placing it in the quadrant where it pays less and is less reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,532/year · Latest SAIDI: 480.0 minutes/year.
SAIDI 2023 breakdown: 480.0 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 155.0 | 86.0 | 0.860 | 1,246,722 |
| 2021 | 293.0 | 90.0 | 1.020 | 1,255,585 |
| 2022 | 151.0 | 92.0 | 0.920 | 1,266,044 |
| 2023 | 480.0 | 93.0 | 1.180 | 1,274,688 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Union Electric Co - (MO) serves 500 ZIP codes in Missouri.
Frequently Asked Questions
How reliable is Union Electric Co - (MO)?
Union Electric Co - (MO) had a SAIDI of 480.0 minutes in 2023 including major weather events, but 93.0 minutes excluding them (the IEEE-standard measure of day-to-day reliability, the gap reflects a major storm that year, not chronic performance). Excluding major weather events, this is below the national average, indicating above-average reliability.
What type of utility is Union Electric Co - (MO)?
Union Electric Co - (MO) is classified as a IOU serving Missouri.
How many customers does Union Electric Co - (MO) serve?
Union Electric Co - (MO) serves approximately 1,254,162 customers in Missouri.
How has Union Electric Co - (MO)'s reliability changed over time?
Union Electric Co - (MO) has 4 years of reliability data (2020-2023). SAIDI has remained relatively stable over this period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- IOU
- State
- Missouri
- Customers
- 1,254,162
- Annual Revenue
- $3.18B
- EIA ID
- 19436
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Union Electric Co - (MO). 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 (1.3M here), outside Missouri.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (480.0 here), outside Missouri, excluding the customer-peer set.
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.