City of Longmont

What This Utility Data Tells You

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.