Watertown Municipal Utilities

What This Utility Data Tells You

Watertown Municipal Utilities is a municipally-owned utility operating in South Dakota under EIA identifier 20187. It reports service to approximately 13,993 customer accounts and generated about $0.03 billion in annual electric revenue, with a service footprint spanning 1 ZIP code. Being municipally owned, the utility answers to a local board or city council rather than a state commission, and carries a federal income tax exemption.

In 2023, the average Watertown Municipal Utilities customer experienced 7.4 minutes of power interruptions, the industry-standard SAIDI metric (System Average Interruption Duration Index). 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 0.10 for the same period, so customers statistically faced roughly 0 distinct interruptions that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 7.4 minutes, the gap between that figure and the headline 7.4 reveals how much weather, not day-to-day infrastructure, drove outages.

With 4 consecutive years of EIA data (2020–2023), Watertown Municipal Utilities's reliability record can be judged on trend rather than one isolated year. Over that window, SAIDI moved from 14.9 down to 7.4 minutes, a trend worth noting for anyone weighing capital investment outcomes.