Municipal · Tennessee · EIA 3408
City of Chattanooga - (TN)
Municipal · Tennessee · 185K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 286 minutes/customer.
Reliability verdict
City of Chattanooga - (TN) shows above-average chronic reliability in 2023: 78 minutes SAIDI excluding major events (286 minutes including them) across 185K customers.
- 286 min
- SAIDI 2023
- 1.73
- SAIFI 2023
- 78 min
- SAIDI ex-MED
- 185K
- 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 City of Chattanooga - (TN) filings show
City of Chattanooga - (TN) is a municipally-owned utility operating in Tennessee under EIA identifier 3408. It reports service to approximately 185,102 customer accounts and generated about $0.56 billion in annual electric revenue, with a service footprint spanning 57 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 City of Chattanooga - (TN) customer experienced 286.2 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). Excluding major weather events from that total, that places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. Over the same period, SAIFI (outage events per customer) was 1.73, putting the typical customer at roughly 2 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 77.7 minutes, the gap between that figure and the headline 286.2 reveals how much weather, not day-to-day infrastructure, drove outages.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for City of Chattanooga - (TN), which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 1192.0 to 286.2 minutes over that window, a meaningful direction for prospective customers and regulators watching capital investment outcomes.
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.
286 outage minutes per customer annually
Minutes without power per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for City of Chattanooga - (TN) from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
City of Chattanooga - (TN) SAIDI trend
City of Chattanooga - (TN) vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
286 Around the middle fewer outage minutes than 31% 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 City of Chattanooga - (TN) sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, City of Chattanooga - (TN) charges more per customer than 76% of them, and is more reliable (lower SAIDI) than 34% 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: $3,038/year · Latest SAIDI: 286.2 minutes/year.
SAIDI 2023 breakdown: 286.2 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 1192.0 | 86.0 | 1.470 | 187,516 |
| 2021 | 73.4 | 58.9 | 0.600 | 189,638 |
| 2022 | 178.4 | 93.3 | 1.573 | - |
| 2023 | 286.2 | 77.7 | 1.730 | - |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
City of Chattanooga - (TN) serves 57 ZIP codes in Tennessee.
Frequently Asked Questions
How reliable is City of Chattanooga - (TN)?
City of Chattanooga - (TN) had a SAIDI of 286.2 minutes in 2023 including major weather events, but 77.7 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 City of Chattanooga - (TN)?
City of Chattanooga - (TN) is classified as a Municipal serving Tennessee.
How many customers does City of Chattanooga - (TN) serve?
City of Chattanooga - (TN) serves approximately 185,102 customers in Tennessee.
How has City of Chattanooga - (TN)'s reliability changed over time?
City of Chattanooga - (TN) 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
- Municipal
- State
- Tennessee
- Customers
- 185,102
- Annual Revenue
- $0.56B
- EIA ID
- 3408
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for City of Chattanooga - (TN). 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 (185K here), outside Tennessee.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (286.2 here), outside Tennessee, 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.