County annual report · FIPS 25001
2023 Barnstable County, MA Power Outage Report
In 2023, customers in Barnstable County, MA went without power for an average of 4.8 hours, a total of 565K customer-hours (Massachusetts average 5.1 hours). That ranks 10th worst of 14 Massachusetts counties and 1515th of 2,977 nationally.
Compared with MA, the US and 2022
Coverage line is EAGLE-I's share of Massachusetts customers tracked each year.
Biggest outages in Barnstable County, 2023
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | December 18, 2023 11:00 | December 21, 2023 07:00 | 2d 20h | 13,901 | 152K |
| 2 | July 13, 2023 12:15 | July 14, 2023 07:30 | 19h 15m | 12,362 | 20K |
| 3 | January 13, 2023 10:00 | January 13, 2023 19:30 | 9h 30m | 12,321 | 7,410 |
| 4 | February 15, 2023 10:45 | February 15, 2023 14:45 | 4h | 10,917 | 13K |
| 5 | November 25, 2023 21:15 | November 26, 2023 02:15 | 5h | 8,619 | 8,627 |
| 6 | July 9, 2023 20:00 | July 10, 2023 03:15 | 7h 15m | 7,735 | 4,820 |
| 7 | July 20, 2023 18:45 | July 21, 2023 03:45 | 9h | 7,629 | 8,947 |
| 8 | April 10, 2023 13:45 | April 20, 2023 11:15 | 9d 21h | 7,223 | 65K |
| 9 | July 30, 2023 02:45 | July 30, 2023 18:30 | 15h 45m | 6,772 | 7,882 |
| 10 | September 25, 2023 08:45 | September 25, 2023 23:45 | 15h | 5,569 | 9,457 |
Outage episodes by size in 2023: 138 reached 100+ customers, 46 reached 1,000+ customers, 4 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Barnstable County reported on EIA Form 861 for 2023, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Massachusetts Electric Co | 2023 | 5.8 hrs | 1.16 | 1.6 hrs | 0.84 |
| NSTAR Electric Company | 2023 | 3.2 hrs | 0.88 | 76 min | 0.67 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Massachusetts's customers in 2023; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 118,437 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Barnstable County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Barnstable County, MA annual power outage report, 2023, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2023/massachusetts/barnstable-county