Municipal · Colorado · EIA 11187
City of Longmont
Municipal · Colorado · 43K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 40 minutes/customer.
Reliability verdict
City of Longmont shows above-average chronic reliability in 2023: 40 minutes SAIDI excluding major events across 43K customers.
- 40 min
- SAIDI 2023
- 0.44
- SAIFI 2023
- 40 min
- SAIDI ex-MED
- 43K
- 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 Longmont filings show
City of Longmont is a municipally-owned utility operating in Colorado under EIA identifier 11187. It reports service to approximately 43,268 customer accounts and generated about $0.09 billion in annual electric revenue, with a service footprint spanning 4 ZIP codes. As a municipal utility, it is typically governed by a local board or city council and is exempt from federal income tax.
In 2023, the average City of Longmont customer experienced 39.7 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). That places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. The SAIFI figure, which tracks average outage events per customer, came in at 0.44 for the same period, meaning customers statistically saw about 0 distinct interruptions that year. Once major event days (hurricanes, ice storms) are excluded, SAIDI comes down to 39.7 minutes, and the spread against the headline 39.7 indicates how much weather, versus routine infrastructure, drove the outage total.
City of Longmont has 4 years of continuous EIA reporting on file (2020–2023), enough to read a real trend rather than a single-year snapshot. SAIDI has increased from 22.8 to 39.7 minutes, which may reflect either 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.
40 min/year per customer
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 Longmont from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
City of Longmont SAIDI trend
City of Longmont vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
40 Among the lowest fewer outage minutes than 87% 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 Longmont 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 Longmont charges more per customer than 13% of them, and is more reliable (lower SAIDI) than 89% of them, placing it in the quadrant where it pays less while still being more reliable, the best-value quadrant. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $1,975/year · Latest SAIDI: 39.7 minutes/year.
SAIDI 2023 breakdown: 39.7 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI |
|---|---|---|---|
| 2020 | 22.8 | 22.8 | 0.375 |
| 2021 | 23.5 | 23.5 | 0.424 |
| 2022 | 25.3 | 25.3 | 0.322 |
| 2023 | 39.7 | 39.7 | 0.437 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
City of Longmont serves 4 ZIP codes in Colorado.
Frequently Asked Questions
How reliable is City of Longmont?
City of Longmont had a SAIDI of 39.7 minutes in 2023. Excluding major storm impacts, this beats the national average, a sign of above-average reliability.
What type of utility is City of Longmont?
City of Longmont is classified as a Municipal serving Colorado.
How many customers does City of Longmont serve?
City of Longmont serves approximately 43,268 customers in Colorado.
How has City of Longmont's reliability changed over time?
City of Longmont 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
- Colorado
- Customers
- 43,268
- Annual Revenue
- $0.09B
- EIA ID
- 11187
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for City of Longmont. 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 (43K here), outside Colorado.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (39.7 here), outside Colorado, 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.