Municipal · Tennessee · EIA 10421

Knoxville Utilities Board

Municipal · Tennessee · 216K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 363 minutes/customer.

Reliability detail ↓ Tennessee utilities

Reliability verdict

Knoxville Utilities Board shows near-benchmark chronic reliability in 2023: 124 minutes SAIDI excluding major events (363 minutes including them) across 216K customers.

363 min
SAIDI 2023
2.42
SAIFI 2023
124 min
SAIDI ex-MED
216K
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 Knoxville Utilities Board filings show

Knoxville Utilities Board is a municipally-owned utility operating in Tennessee under EIA identifier 10421. It reports service to approximately 216,175 customer accounts and generated about $0.61 billion in annual electric revenue, with a service footprint spanning 45 ZIP codes. Being municipally owned, the utility answers to a local board or city council rather than a state commission, and carries a federal income tax exemption.

In 2023, the average Knoxville Utilities Board customer experienced 363.0 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that lands within the usual 120–180 minute national benchmark band, roughly on par with typical U.S. distribution-utility performance. SAIFI, the average number of outage events per customer, was 2.42 for the same period, so customers statistically faced roughly 2 distinct interruptions that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 123.6 minutes; the difference from the headline 363.0 shows how much of the outage total came from weather rather than everyday grid issues.

The EIA dataset includes 4 years of continuous reporting (2020–2023) for Knoxville Utilities Board, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. Over that span, SAIDI rose from 279.0 to 363.0 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.

F
Reliability Score
31/100
Knoxville Utilities Board · 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 D 123.6 min/yr
SAIDI excluding major-event days — day-to-day grid performance
Total Outage Duration F 363.0 min/yr
SAIDI including storms and major events — the full-year experience
Outage Frequency F 2.42/yr
SAIFI — average number of interruptions per customer per year
SAIDI vs. national mean (341 min) 48.4%

363 outage minutes per customer annually

Knoxville Utilities Board SAIDI

Minutes without power per year (2023)

363 SAIDI363 SAIDINat. avg 341341SAIDI363SAIDI

Average

SAIDI by year (2020-2023)

Minutes per customer-year · EIA Form 861

Year-by-year SAIDI for Knoxville Utilities Board 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

Knoxville Utilities Board SAIDI trend

0 100 200 300 400 2020 2021 2022 2023 279 142.8 251.4 363
Year-by-year SAIDI from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.

Knoxville Utilities Board vs the nationwide SAIDI distribution

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

363 Around the middle fewer outage minutes than 25% 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 Knoxville Utilities Board sits on price vs. reliability

Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Knoxville Utilities Board charges more per customer than 66% of them, and is more reliable (lower SAIDI) than 28% 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.

Knoxville Utilities Board 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: 50Point, Price percentile: 13 · Reliability percentile: 90Point, Price percentile: 15 · Reliability percentile: 12Point, Price percentile: 18 · Reliability percentile: 27Point, Price percentile: 20 · Reliability percentile: 17Point, Price percentile: 23 · Reliability percentile: 80Point, Price percentile: 25 · Reliability percentile: 10Point, Price percentile: 28 · Reliability percentile: 55Point, Price percentile: 30 · Reliability percentile: 67Point, Price percentile: 33 · Reliability percentile: 65Point, Price percentile: 35 · Reliability percentile: 7Point, Price percentile: 38 · Reliability percentile: 0Point, Price percentile: 40 · Reliability percentile: 75Point, Price percentile: 43 · Reliability percentile: 2Point, 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: 55 · Reliability percentile: 97Point, Price percentile: 57 · Reliability percentile: 100Point, Price percentile: 60 · Reliability percentile: 5Point, Price percentile: 63 · Reliability percentile: 62Point, Price percentile: 65 · Reliability percentile: 47Point, Price percentile: 70 · Reliability percentile: 77Point, Price percentile: 73 · Reliability percentile: 57Point, Price percentile: 75 · Reliability percentile: 52Point, Price percentile: 78 · Reliability percentile: 92Point, Price percentile: 80 · Reliability percentile: 25Point, Price percentile: 83 · Reliability percentile: 95Point, Price percentile: 85 · Reliability percentile: 37Point, Price percentile: 88 · Reliability percentile: 30Point, Price percentile: 90 · Reliability percentile: 85Point, Price percentile: 93 · Reliability percentile: 70Point, Price percentile: 95 · Reliability percentile: 87Point, Price percentile: 98 · Reliability percentile: 72Point, Price percentile: 100 · Reliability percentile: 60Knoxville Utilities Board, Price percentile: 66 · Reliability percentile: 28
Knoxville Utilities Board vs. a 40-utility national peer sample, price percentile vs. reliability percentile.

Revenue per customer: $2,812/year · Latest SAIDI: 363.0 minutes/year.

SAIDI 2023 breakdown: 363.0 minutes

Reliability Trend (2020–2023)

Year SAIDI (min) SAIDI nMED SAIFI Customers
2020 279.0 128.0 2.110 207,360
2021 142.8 116.4 - 210,133
2022 251.4 103.2 2.190 213,637
2023 363.0 123.6 2.420 216,995

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

Service Area

Knoxville Utilities Board serves 45 ZIP codes in Tennessee.

377053770937716377213773737754377643777137772377773777937804378063780737820378303784837849378533786137865378713787637888379023790937912379143791537916379173791837919379203792137922379233792437929379313793237934379383799637998

Frequently Asked Questions

How reliable is Knoxville Utilities Board?

Knoxville Utilities Board had a SAIDI of 363.0 minutes in 2023 including major weather events, but 123.6 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 storm impacts, this tracks roughly with the national average.

What type of utility is Knoxville Utilities Board?

Knoxville Utilities Board is classified as a Municipal serving Tennessee.

How many customers does Knoxville Utilities Board serve?

Knoxville Utilities Board serves approximately 216,175 customers in Tennessee.

How has Knoxville Utilities Board's reliability changed over time?

Knoxville Utilities Board 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
Tennessee
Customers
216,175
Annual Revenue
$0.61B
EIA ID
10421

Explore

Utilities with similar EIA profiles

Two cross-state peer sets for Knoxville Utilities Board. 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 (216K here), outside Tennessee.

Dayton Power & Light Co 213K · OH Cobb Electric Membership Corp 221K · GA South Carolina Public Service Authority 209K · SC Entergy New Orleans, LLC 209K · LA

Similar chronic SAIDI

Nearest utilities by latest SAIDI minutes (363.0 here), outside Tennessee, excluding the customer-peer set.

Cooke County Elec Coop Assn 363.2 min · TX East Central Oklahoma Elec Coop Inc 364.4 min · OK Upper Michigan Energy Resources Corp. 365.0 min · MI Georgia Power Co 365.1 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.