Cooperative · South Carolina · EIA 14175

Tri-County Electric Coop, Inc (SC)

Cooperative · South Carolina · 18K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 427 minutes/customer.

Reliability detail ↓ South Carolina utilities

Reliability verdict

Tri-County Electric Coop, Inc (SC) shows near-benchmark chronic reliability in 2023: 197 minutes SAIDI excluding major events (427 minutes including them) across 18K customers.

427 min
SAIDI 2023
3.75
SAIFI 2023
197 min
SAIDI ex-MED
18K
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: long interruption minutes vs the 911 utility cohort (>258 min tercile cut).

What long-outage Tri-County Electric Coop, Inc (SC) filings show

Tri-County Electric Coop, Inc (SC) is a member-owned electric cooperative operating in South Carolina under EIA identifier 14175. It reports service to approximately 18,377 customer accounts and generated about $0.05 billion in annual electric revenue, with a service footprint spanning 20 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 (SC) customer experienced 427.4 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that sits within the 120–180 minute national benchmark range, indicating performance typical of U.S. distribution utilities. Over the same period, SAIFI (outage events per customer) was 3.75, putting the typical customer at roughly 4 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 196.9 minutes, the gap between that figure and the headline 427.4 reveals how much weather, not day-to-day infrastructure, drove outages.

Tri-County Electric Coop, Inc (SC) has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. SAIDI has increased from 244.8 to 427.4 minutes, which may reflect either worsening weather exposure or delayed grid modernization.

F
Reliability Score
18/100
Tri-County Electric Coop, Inc (SC) · 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 F 196.9 min/yr
SAIDI excluding major-event days — day-to-day grid performance
Total Outage Duration F 427.4 min/yr
SAIDI including storms and major events — the full-year experience
Outage Frequency F 3.75/yr
SAIFI — average number of interruptions per customer per year
SAIDI vs. national mean (341 min) 57.0%

427 minutes per customer per year

Tri-County Electric Coop, Inc (SC) SAIDI

Annual minutes without electric service (2023)

427 SAIDI427 SAIDINat. avg 341341SAIDI427SAIDI

Average

SAIDI by year (2020-2023)

Minutes per customer-year · EIA Form 861

Year-by-year SAIDI for Tri-County Electric Coop, Inc (SC) 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

Tri-County Electric Coop, Inc (SC) SAIDI trend

0 100 200 300 400 500 600 2020 2021 2022 2023 244.8 244.8 585 427.4
Year-by-year SAIDI from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.

Tri-County Electric Coop, Inc (SC) vs the nationwide SAIDI distribution

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

427 Higher than most fewer outage minutes than 21% 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 (SC) 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 (SC) charges more per customer than 52% of them, and is more reliable (lower SAIDI) than 23% 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.

Tri-County Electric Coop, Inc (SC) 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: 32Point, Price percentile: 3 · Reliability percentile: 43Point, Price percentile: 5 · Reliability percentile: 35Point, Price percentile: 8 · Reliability percentile: 82Point, Price percentile: 10 · Reliability percentile: 47Point, Price percentile: 13 · Reliability percentile: 90Point, Price percentile: 15 · Reliability percentile: 12Point, Price percentile: 18 · Reliability percentile: 27Point, Price percentile: 20 · Reliability percentile: 20Point, Price percentile: 23 · Reliability percentile: 80Point, Price percentile: 25 · Reliability percentile: 10Point, Price percentile: 28 · Reliability percentile: 52Point, Price percentile: 30 · Reliability percentile: 62Point, Price percentile: 33 · Reliability percentile: 60Point, Price percentile: 35 · Reliability percentile: 7Point, Price percentile: 38 · Reliability percentile: 0Point, Price percentile: 40 · Reliability percentile: 72Point, Price percentile: 43 · Reliability percentile: 5Point, Price percentile: 45 · Reliability percentile: 22Point, Price percentile: 48 · Reliability percentile: 15Point, Price percentile: 50 · Reliability percentile: 45Point, Price percentile: 53 · Reliability percentile: 40Point, Price percentile: 57 · Reliability percentile: 92Point, Price percentile: 60 · Reliability percentile: 77Point, Price percentile: 63 · Reliability percentile: 2Point, Price percentile: 65 · Reliability percentile: 70Point, Price percentile: 68 · Reliability percentile: 97Point, Price percentile: 70 · Reliability percentile: 75Point, Price percentile: 73 · Reliability percentile: 55Point, Price percentile: 75 · Reliability percentile: 50Point, Price percentile: 78 · Reliability percentile: 95Point, Price percentile: 80 · Reliability percentile: 25Point, Price percentile: 83 · Reliability percentile: 100Point, Price percentile: 85 · Reliability percentile: 37Point, Price percentile: 88 · Reliability percentile: 30Point, Price percentile: 90 · Reliability percentile: 85Point, Price percentile: 93 · Reliability percentile: 65Point, Price percentile: 95 · Reliability percentile: 87Point, Price percentile: 98 · Reliability percentile: 67Point, Price percentile: 100 · Reliability percentile: 57Tri-County Electric Coop, Inc (SC), Price percentile: 52 · Reliability percentile: 23
Tri-County Electric Coop, Inc (SC) vs. a 40-utility national peer sample, price percentile vs. reliability percentile.

Revenue per customer: $2,558/year · Latest SAIDI: 427.4 minutes/year.

SAIDI 2023 breakdown: 427.4 minutes

Reliability Trend (2020–2023)

Year SAIDI (min) SAIDI nMED SAIFI Customers
2020 244.8 207.2 3.390 18,153
2021 244.8 203.1 2.610 18,355
2022 585.0 185.7 3.540 18,355
2023 427.4 196.9 3.750 18,377

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

Service Area

Tri-County Electric Coop, Inc (SC) serves 20 ZIP codes in South Carolina.

2901829030290442904729048290522905329059290612911229115291182912529135291422914829160291632920929448

Frequently Asked Questions

How reliable is Tri-County Electric Coop, Inc (SC)?

Tri-County Electric Coop, Inc (SC) had a SAIDI of 427.4 minutes in 2023 including major weather events, but 196.9 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). Excluding major weather events, this is near the national average.

What type of utility is Tri-County Electric Coop, Inc (SC)?

Tri-County Electric Coop, Inc (SC) is classified as a Cooperative serving South Carolina.

How many customers does Tri-County Electric Coop, Inc (SC) serve?

Tri-County Electric Coop, Inc (SC) serves approximately 18,377 customers in South Carolina.

How has Tri-County Electric Coop, Inc (SC)'s reliability changed over time?

Tri-County Electric Coop, Inc (SC) 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
Customers
18,377
Annual Revenue
$0.05B
EIA ID
14175

Explore

Utilities with similar EIA profiles

Two cross-state peer sets for Tri-County Electric Coop, Inc (SC). 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 (18K here), outside South Carolina.

City of Westfield - (MA) 18K · MA Sun Prairie Utilities 18K · WI Manitowoc Public Utilities 18K · WI Coos-Curry Electric Coop, Inc 19K · OR

Similar chronic SAIDI

Nearest utilities by latest SAIDI minutes (427.4 here), outside South Carolina, excluding the customer-peer set.

Metropolitan Edison Co 427.0 min · PA Appalachian Power Co 429.3 min · VA Upper Peninsula Power Company 425.1 min · MI Altamaha Electric Member Corp 424.7 min · GA

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.