Municipal · Tennessee · EIA 11789
Maryville Utilities
Municipal · Tennessee · 23K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 120 minutes/customer.
Reliability verdict
Maryville Utilities shows above-average chronic reliability in 2023: 93 minutes SAIDI excluding major events across 23K customers.
- 120 min
- SAIDI 2023
- 1.10
- SAIFI 2023
- 93 min
- SAIDI ex-MED
- 23K
- 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 Maryville Utilities filings show
Maryville Utilities is a municipally-owned utility operating in Tennessee under EIA identifier 11789. It reports service to approximately 22,947 customer accounts and generated about $0.07 billion in annual electric revenue, with a service footprint spanning 4 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 Maryville Utilities customer experienced 120.0 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. 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 1.10, putting the typical customer at roughly 1 distinct interruption that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 93.1 minutes; the difference from the headline 120.0 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 Maryville Utilities, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI has improved from 323.0 to 120.0 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.
120 outage minutes per customer annually
Power-out minutes per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Maryville Utilities from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Maryville Utilities SAIDI trend
Maryville Utilities vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
120 Lower than most fewer outage minutes than 61% 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 Maryville Utilities sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Maryville Utilities charges more per customer than 78% of them, and is more reliable (lower SAIDI) than 64% of them, placing it in the quadrant where it pays more and is more reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $3,110/year · Latest SAIDI: 120.0 minutes/year.
SAIDI 2023 breakdown: 120.0 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 323.0 | 66.0 | 2.350 | 19,147 |
| 2021 | 88.3 | 55.7 | 1.370 | 22,703 |
| 2022 | 186.4 | 79.8 | 2.880 | 22,423 |
| 2023 | 120.0 | 93.1 | 1.098 | 22,947 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Maryville Utilities serves 4 ZIP codes in Tennessee.
Frequently Asked Questions
How reliable is Maryville Utilities?
Maryville Utilities had a SAIDI of 120.0 minutes in 2023. Excluding major storm impacts, this beats the national average, a sign of above-average reliability.
What type of utility is Maryville Utilities?
Maryville Utilities is classified as a Municipal serving Tennessee.
How many customers does Maryville Utilities serve?
Maryville Utilities serves approximately 22,947 customers in Tennessee.
How has Maryville Utilities's reliability changed over time?
Maryville Utilities 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
- Municipal
- State
- Tennessee
- Customers
- 22,947
- Annual Revenue
- $0.07B
- EIA ID
- 11789
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Maryville Utilities. 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 (23K here), outside Tennessee.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (120.0 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.