Municipal · Arizona · EIA 12351
City of Mesa - (AZ)
Municipal · Arizona · 18K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 86 minutes/customer.
Reliability verdict
City of Mesa - (AZ) shows above-average chronic reliability in 2023: 11 minutes SAIDI excluding major events (86 minutes including them) across 18K customers.
- 86 min
- SAIDI 2023
- 1.01
- SAIFI 2023
- 11 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.
Signature read: short interruption minutes vs the 911 utility cohort (≤96 min tercile cut).
What short-outage City of Mesa - (AZ) filings show
City of Mesa - (AZ) is a municipally-owned utility operating in Arizona under EIA identifier 12351. It reports service to approximately 17,787 customer accounts and generated about $0.05 billion in annual electric revenue, with a service footprint spanning 31 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 Mesa - (AZ) customer experienced 86.2 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). Excluding major weather events from that total, that is comfortably under the 120–180 minute national benchmark range, a sign of solid grid resilience and quick outage response. The SAIFI figure, which tracks average outage events per customer, came in at 1.01 for the same period, meaning customers statistically saw about 1 distinct interruption that year. Once major event days (hurricanes, ice storms) are excluded, SAIDI comes down to 10.6 minutes, and the spread against the headline 86.2 indicates how much weather, versus routine infrastructure, drove the outage total.
With 4 consecutive years of EIA data (2020–2023), City of Mesa - (AZ)'s reliability record can be judged on trend rather than one isolated year. Over that span, SAIDI rose from 72.0 to 86.2 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.
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.
86 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 City of Mesa - (AZ) from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
City of Mesa - (AZ) SAIDI trend
City of Mesa - (AZ) vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
86 Lower than most fewer outage minutes than 70% 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 Mesa - (AZ) 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 Mesa - (AZ) charges more per customer than 69% of them, and is more reliable (lower SAIDI) than 73% 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: $2,876/year · Latest SAIDI: 86.2 minutes/year.
SAIDI 2023 breakdown: 86.2 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 72.0 | 36.9 | 0.634 | 16,971 |
| 2021 | 52.0 | 20.2 | 11.710 | 17,325 |
| 2022 | 52.1 | 20.2 | 1.873 | 17,326 |
| 2023 | 86.2 | 10.6 | 1.012 | 17,673 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
City of Mesa - (AZ) serves 31 ZIP codes in Arizona.
Frequently Asked Questions
How reliable is City of Mesa - (AZ)?
City of Mesa - (AZ) had a SAIDI of 86.2 minutes in 2023 including major weather events, but 10.6 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 weather events, this is below the national average, indicating above-average reliability.
What type of utility is City of Mesa - (AZ)?
City of Mesa - (AZ) is classified as a Municipal serving Arizona.
How many customers does City of Mesa - (AZ) serve?
City of Mesa - (AZ) serves approximately 17,787 customers in Arizona.
How has City of Mesa - (AZ)'s reliability changed over time?
City of Mesa - (AZ) 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
- Arizona
- Customers
- 17,787
- Annual Revenue
- $0.05B
- EIA ID
- 12351
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for City of Mesa - (AZ). 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 Arizona.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (86.2 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.