Cooperative · Illinois · EIA 18955
Tri-County Electric Coop, Inc (IL)
Cooperative · Illinois · 17K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 258 minutes/customer.
Reliability verdict
Tri-County Electric Coop, Inc (IL) shows above-average chronic reliability in 2023: 52 minutes SAIDI excluding major events (258 minutes including them) across 17K customers.
- 258 min
- SAIDI 2023
- 1.91
- SAIFI 2023
- 52 min
- SAIDI ex-MED
- 17K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.
What mid-pack Tri-County Electric Coop, Inc (IL) filings show
Tri-County Electric Coop, Inc (IL) is a member-owned electric cooperative operating in Illinois under EIA identifier 18955. It reports service to approximately 16,588 customer accounts and generated about $0.05 billion in annual electric revenue, with a service footprint spanning 47 ZIP codes. Cooperative ownership means the utility is run for the benefit of the ratepayer-members who elect its board, rather than for shareholder returns, which can shift how rate and investment decisions get made.
In 2023, the average Tri-County Electric Coop, Inc (IL) customer experienced 257.6 minutes of power interruptions, a measure known as SAIDI, or 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 1.91, putting the typical customer at roughly 2 distinct interruptions that year. Once major event days (hurricanes, ice storms) are excluded, SAIDI comes down to 51.5 minutes, and the spread against the headline 257.6 indicates how much weather, versus routine infrastructure, drove the outage total.
With 4 consecutive years of EIA data (2020–2023), Tri-County Electric Coop, Inc (IL)'s reliability record can be judged on trend rather than one isolated year. Over that span, SAIDI rose from 160.5 to 257.6 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.
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.
258 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 Tri-County Electric Coop, Inc (IL) from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Tri-County Electric Coop, Inc (IL) SAIDI trend
Tri-County Electric Coop, Inc (IL) vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
258 Around the middle fewer outage minutes than 34% 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 Tri-County Electric Coop, Inc (IL) sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Tri-County Electric Coop, Inc (IL) charges more per customer than 74% of them, and is more reliable (lower SAIDI) than 37% of them, placing it in the quadrant where it pays more but is LESS reliable, a premium price without a reliability payoff. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $2,986/year · Latest SAIDI: 257.6 minutes/year.
SAIDI 2023 breakdown: 257.6 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 160.5 | 83.1 | 1.140 | 16,501 |
| 2021 | 210.7 | 62.5 | 1.860 | 16,625 |
| 2022 | 183.5 | 68.1 | 1.590 | 16,657 |
| 2023 | 257.6 | 51.5 | 1.910 | 16,662 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Tri-County Electric Coop, Inc (IL) serves 47 ZIP codes in Illinois.
Frequently Asked Questions
How reliable is Tri-County Electric Coop, Inc (IL)?
Tri-County Electric Coop, Inc (IL) had a SAIDI of 257.6 minutes in 2023 including major weather events, but 51.5 minutes excluding them (the IEEE-standard day-to-day reliability measure, the difference points to a major storm that year rather than an ongoing problem). Leaving aside major weather events, that figure comes in under the national average, pointing to above-average reliability.
What type of utility is Tri-County Electric Coop, Inc (IL)?
Tri-County Electric Coop, Inc (IL) is classified as a Cooperative serving Illinois.
How many customers does Tri-County Electric Coop, Inc (IL) serve?
Tri-County Electric Coop, Inc (IL) serves approximately 16,588 customers in Illinois.
How has Tri-County Electric Coop, Inc (IL)'s reliability changed over time?
Tri-County Electric Coop, Inc (IL) has 4 years of reliability data (2020-2023). This utility's SAIDI has stayed fairly flat over the period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- Cooperative
- State
- Illinois
- Customers
- 16,588
- Annual Revenue
- $0.05B
- EIA ID
- 18955
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Tri-County Electric Coop, Inc (IL). 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 (17K here), outside Illinois.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (257.6 here), outside Illinois, 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.