Municipal · Oklahoma · EIA 18125

Stillwater Utilities Authority

Municipal · Oklahoma · 22K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 128 minutes/customer.

Reliability detail ↓ Oklahoma utilities

Reliability verdict

Stillwater Utilities Authority shows above-average chronic reliability in 2023: 43 minutes SAIDI excluding major events (128 minutes including them) across 22K customers.

128 min
SAIDI 2023
0.89
SAIFI 2023
43 min
SAIDI ex-MED
22K
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: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.

What mid-pack Stillwater Utilities Authority filings show

Stillwater Utilities Authority is a municipally-owned utility operating in Oklahoma under EIA identifier 18125. It reports service to approximately 22,150 customer accounts and generated about $0.06 billion in annual electric revenue, with a service footprint spanning 4 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 Stillwater Utilities Authority customer experienced 128.4 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). Excluding major weather events from that total, that keeps this utility below the typical 120–180 minute national benchmark, consistent with a well-hardened distribution system and fast restoration crews. SAIFI, the average number of outage events per customer, was 0.89 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 42.5 minutes, the gap between that figure and the headline 128.4 reveals how much weather, not day-to-day infrastructure, drove outages.

Stillwater Utilities Authority has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. Over that window, SAIDI moved from 627.5 down to 128.4 minutes, a trend worth noting for anyone weighing capital investment outcomes.

B-
Reliability Score
69/100
Stillwater Utilities Authority · 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 B+ 42.5 min/yr
SAIDI excluding major-event days — day-to-day grid performance
Total Outage Duration C 128.4 min/yr
SAIDI including storms and major events — the full-year experience
Outage Frequency B- 0.89/yr
SAIFI — average number of interruptions per customer per year
SAIDI vs. national mean (341 min) 17.1%

128 min/year per customer

Stillwater Utilities Authority SAIDI

Power-out minutes per year (2023)

128 SAIDI128 SAIDINat. avg 341341SAIDI128SAIDI

Excellent

SAIDI by year (2020-2023)

Minutes per customer-year · EIA Form 861

Year-by-year SAIDI for Stillwater Utilities Authority 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

Stillwater Utilities Authority SAIDI trend

0 100 200 300 400 500 600 700 2020 2021 2022 2023 627.5 336.9 67.3 128.4
Year-by-year SAIDI from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.

Stillwater Utilities Authority vs the nationwide SAIDI distribution

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

128 Lower than most fewer outage minutes than 58% 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 Stillwater Utilities 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, Stillwater Utilities Authority charges more per customer than 51% of them, and is more reliable (lower SAIDI) than 62% 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.

Stillwater Utilities Authority 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: 30Point, Price percentile: 3 · Reliability percentile: 37Point, Price percentile: 5 · Reliability percentile: 32Point, Price percentile: 8 · Reliability percentile: 80Point, Price percentile: 10 · Reliability percentile: 43Point, Price percentile: 13 · Reliability percentile: 90Point, Price percentile: 15 · Reliability percentile: 12Point, Price percentile: 18 · Reliability percentile: 25Point, Price percentile: 20 · Reliability percentile: 17Point, Price percentile: 23 · Reliability percentile: 77Point, Price percentile: 25 · Reliability percentile: 10Point, Price percentile: 28 · Reliability percentile: 47Point, Price percentile: 30 · Reliability percentile: 60Point, Price percentile: 33 · Reliability percentile: 57Point, Price percentile: 35 · Reliability percentile: 7Point, Price percentile: 38 · Reliability percentile: 0Point, Price percentile: 40 · Reliability percentile: 70Point, Price percentile: 43 · Reliability percentile: 5Point, Price percentile: 45 · Reliability percentile: 20Point, Price percentile: 48 · Reliability percentile: 15Point, Price percentile: 50 · Reliability percentile: 40Point, Price percentile: 55 · Reliability percentile: 85Point, Price percentile: 57 · Reliability percentile: 92Point, Price percentile: 60 · Reliability percentile: 75Point, Price percentile: 63 · Reliability percentile: 2Point, Price percentile: 65 · Reliability percentile: 67Point, Price percentile: 68 · Reliability percentile: 97Point, Price percentile: 70 · Reliability percentile: 72Point, Price percentile: 73 · Reliability percentile: 50Point, Price percentile: 75 · Reliability percentile: 45Point, Price percentile: 78 · Reliability percentile: 95Point, Price percentile: 80 · Reliability percentile: 22Point, Price percentile: 83 · Reliability percentile: 100Point, Price percentile: 85 · Reliability percentile: 35Point, Price percentile: 88 · Reliability percentile: 27Point, Price percentile: 90 · Reliability percentile: 82Point, Price percentile: 93 · Reliability percentile: 62Point, Price percentile: 95 · Reliability percentile: 87Point, Price percentile: 98 · Reliability percentile: 65Point, Price percentile: 100 · Reliability percentile: 52Stillwater Utilities Authority, Price percentile: 51 · Reliability percentile: 62
Stillwater Utilities Authority vs. a 40-utility national peer sample, price percentile vs. reliability percentile.

Revenue per customer: $2,541/year · Latest SAIDI: 128.4 minutes/year.

SAIDI 2023 breakdown: 128.4 minutes

Reliability Trend (2020–2023)

Year SAIDI (min) SAIDI nMED SAIFI Customers
2020 627.5 46.3 1.880 -
2021 336.9 40.2 0.910 -
2022 67.3 64.7 0.920 -
2023 128.4 42.5 0.890 22,150

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

Service Area

Stillwater Utilities Authority serves 4 ZIP codes in Oklahoma.

74074740757407674078

Frequently Asked Questions

How reliable is Stillwater Utilities Authority?

Stillwater Utilities Authority had a SAIDI of 128.4 minutes in 2023 including major weather events, but 42.5 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 Stillwater Utilities Authority?

Stillwater Utilities Authority is classified as a Municipal serving Oklahoma.

How many customers does Stillwater Utilities Authority serve?

Stillwater Utilities Authority serves approximately 22,150 customers in Oklahoma.

How has Stillwater Utilities Authority's reliability changed over time?

Stillwater Utilities Authority 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
Oklahoma
Customers
22,150
Annual Revenue
$0.06B
EIA ID
18125

Explore

Utilities with similar EIA profiles

Two cross-state peer sets for Stillwater Utilities 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 (22K here), outside Oklahoma.

Lynches River Elec Coop, Inc 22K · SC Beltrami Electric Coop, Inc 22K · MN Capital Electric Coop, Inc 22K · ND PUD No 1 of Okanogan County 22K · WA

Similar chronic SAIDI

Nearest utilities by latest SAIDI minutes (128.4 here), outside Oklahoma, excluding the customer-peer set.

BENCO Electric Cooperative 128.3 min · MN Northern Neck Elec Coop, Inc 128.8 min · VA La Plata Electric Assn, Inc 129.2 min · CO Roanoke Electric Member Corp 130.1 min · NC

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.