State · Arizona · EIA 13314
Navajo Tribal Utility Authority
State · Arizona · 31K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 436 minutes/customer.
Reliability verdict
Navajo Tribal Utility Authority shows below-average chronic reliability in 2023: 326 minutes SAIDI excluding major events across 31K customers.
- 436 min
- SAIDI 2023
- 4.53
- SAIFI 2023
- 326 min
- SAIDI ex-MED
- 31K
- 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 Navajo Tribal Utility Authority filings show
Navajo Tribal Utility Authority is a state utility operating in Arizona under EIA identifier 13314. It reports service to approximately 30,628 customer accounts and generated about $0.08 billion in annual electric revenue, with a service footprint spanning 90 ZIP codes.
In 2023, the average Navajo Tribal Utility Authority customer experienced 435.6 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). That exceeds the 120–180 minute national benchmark by a wide margin, a pattern often tied to severe weather exposure, older infrastructure, or longer repair windows. Over the same period, SAIFI (outage events per customer) was 4.53, putting the typical customer at roughly 5 distinct interruptions that year. Once major event days (hurricanes, ice storms) are excluded, SAIDI comes down to 326.4 minutes, and the spread against the headline 435.6 indicates how much weather, versus routine infrastructure, drove the outage total.
The EIA dataset includes 4 years of continuous reporting (2020–2023) for Navajo Tribal Utility Authority, which lets you see whether reliability is trending up or down rather than judging from a single snapshot. SAIDI climbed from 210.4 to 435.6 minutes over that window, a shift that can point to worsening weather exposure or delayed grid modernization.
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.
436 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 Navajo Tribal Utility Authority from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Navajo Tribal Utility Authority SAIDI trend
Navajo Tribal Utility Authority vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
436 Higher than most fewer outage minutes than 20% 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 Navajo Tribal Utility Authority sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Navajo Tribal Utility Authority charges more per customer than 53% 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.
Revenue per customer: $2,598/year · Latest SAIDI: 435.6 minutes/year.
SAIDI 2023 breakdown: 435.6 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI |
|---|---|---|---|
| 2020 | 210.4 | 210.4 | 2.970 |
| 2021 | 551.8 | 287.9 | 18.240 |
| 2022 | 438.5 | 358.2 | 4.040 |
| 2023 | 435.6 | 326.4 | 4.530 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Navajo Tribal Utility Authority serves 90 ZIP codes in Arizona.
Frequently Asked Questions
How reliable is Navajo Tribal Utility Authority?
Navajo Tribal Utility Authority had a SAIDI of 435.6 minutes in 2023. Excluding major weather events, this is above the national average, indicating below-average reliability.
What type of utility is Navajo Tribal Utility Authority?
Navajo Tribal Utility Authority is classified as a State serving Arizona.
How many customers does Navajo Tribal Utility Authority serve?
Navajo Tribal Utility Authority serves approximately 30,628 customers in Arizona.
How has Navajo Tribal Utility Authority's reliability changed over time?
Navajo Tribal Utility Authority 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
- State
- State
- Arizona
- Customers
- 30,628
- Annual Revenue
- $0.08B
- EIA ID
- 13314
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Navajo Tribal Utility Authority. 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 (31K here), outside Arizona.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (435.6 here), outside Arizona, 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.