Power Outages in St. Mary's County, MD
Southern Maryland Elec Coop Inc publishes only a system-wide total, not county figures. In 2025, the average customer here lost power for about 3.9 hours.
St. Mary's County, MD is served by 1 tracked utility.
Cite this data
- URL
- https://massoutage.com/maryland/st-marys-county
- As of
- Not available
- Publisher
- MassOutage
MassOutage, "Power Outages in St. Mary's County, MD". https://massoutage.com/maryland/st-marys-county
Southern Maryland Elec Coop Inc publishes no county-level figures.
0.0%of this county's ~111,796 customers are served by utilities with a county-level live feed.
System-wide total only, no county split: Southern Maryland Elec Coop Inc.
| Utility | Feed | Out | Served | % out | Small outages | Incidents | Utility ETR | As of |
|---|---|---|---|---|---|---|---|---|
| Southern Maryland Elec Coop Inc | Live · total only | not by county | - | - | - | - | - | - |
Electricity-dependent residents
HHS emPOWER · data October 7, 2026Medicare beneficiaries in St. Mary's Countywho rely on electricity-dependent medical equipment (ventilators, oxygen concentrators, home dialysis, powered wheelchairs, and more). HHS reports counts of 1–10 as “≤11”. Medicare only, so the full at-risk population is larger.
By ZIP code (23)
| ZIP | Power-dependent | Ventilators | O2 concentrators | Home dialysis |
|---|---|---|---|---|
| 20659 | 189 | ≤11 | 159 | ≤11 |
| 20653 | 165 | ≤11 | 124 | ≤11 |
| 20650 | 130 | ≤11 | 106 | 0 |
| 20636 | 76 | ≤11 | 61 | ≤11 |
| 20619 | 71 | ≤11 | 57 | ≤11 |
| 20634 | 50 | ≤11 | 39 | ≤11 |
| 20609 | 19 | 0 | 17 | ≤11 |
| 20621 | 16 | ≤11 | ≤11 | 0 |
| 20674 | 15 | 0 | 12 | 0 |
| 20692 | ≤11 | 0 | ≤11 | ≤11 |
| 20690 | ≤11 | 0 | ≤11 | 0 |
| 20687 | ≤11 | 0 | ≤11 | 0 |
| 20684 | ≤11 | 0 | ≤11 | 0 |
| 20680 | ≤11 | ≤11 | ≤11 | 0 |
| 20670 | ≤11 | 0 | ≤11 | 0 |
| 20656 | ≤11 | 0 | ≤11 | 0 |
| 20630 | ≤11 | 0 | ≤11 | 0 |
| 20628 | ≤11 | ≤11 | ≤11 | ≤11 |
| 20626 | ≤11 | 0 | ≤11 | 0 |
| 20624 | ≤11 | 0 | ≤11 | 0 |
| 20620 | ≤11 | ≤11 | ≤11 | 0 |
| 20618 | ≤11 | 0 | ≤11 | 0 |
| 20606 | ≤11 | 0 | ≤11 | 0 |
Emergency managers can request identified beneficiary lists through their state health department via the HHS emPOWER program.
Outage began, grew, restoration estimate changed, restored: by email, Slack, Teams, Discord or signed webhook, for St. Mary's County or any town and utility in it.
No active NWS alerts for St. Mary's County right now.
St. Mary's County has been under 34 National Weather Service alerts recently, most recently a Severe Thunderstorm Watch on October 16, 2026.
- Coastal Flood Advisory ×16
- Coastal Flood Warning ×7
- Severe Thunderstorm Watch ×6
- Special Weather Statement ×3
- Coastal Flood Watch ×2
Latest St. Mary's County, MD outage updates
A running log of how this outage has changed, updated automatically as utilities report in.
- RESOLVED
Power restored after 1h 51m
- OUTAGE BEGAN
Outage began: 669 customers out (1.2% of the county)
- RESOLVED
Power restored after 34m
- OUTAGE BEGAN
Outage began: 1,204 customers out (2.2% of the county)
Hardest-hit cities in St. Mary's County
Where this event is concentrated across the county's towns and townships.
Historical reliability
In 2025, the average customer in St. Mary's County went about 3.9 hours without power. Peak simultaneous outage on record reached 20,346 customers.
The US EIA reports Maryland utilities averaged 3.1 hrs without power per customer (SAIDI) in 2025, a cross-check on our county estimate of 3.9 hrs.
Worst year here was 2022 (peak 14,054 customers out) · decade average 3.9 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2015 | 838 | 20,346 | 2.5 |
| 2016 | 855 | 3,650 | 1.7 |
| 2017 | 882 | 10,961 | 2.4 |
| 2018 | 886 | 11,852 | 7.1 |
| 2019 | 857 | 6,830 | 2.7 |
| 2020 | 818 | 10,173 | 4.3 |
| 2021 | 882 | 9,252 | 3.4 |
| 2022 | 912 | 14,054 | 7.8 |
| 2023 | 855 | 6,238 | 3.4 |
| 2024 | 888 | 12,061 | 3.3 |
| 2025 | 892 | 11,745 | 3.9 |
Cost of power in St. Mary's County
ENERGY & AI DEMAND →Estimated residential electricity price for St. Mary's County, customer-weighted across the utilities serving it (US EIA, 2025). Retail prices aren't published at the county level; this is a derived estimate.
- Southern Maryland Elec Coop Inc16.4¢162,860 cust
Weighted by each utility's residential customer count (utilities report customers at the state level; a per-county share isn't published). Rising retail prices track a national demand surge; see energy & the data-center boom.
Relatively Moderate hurricanes exposure · 3.9 hrs/yr of outages over the last decade.
Power outages in St. Mary's County: FAQ
- How often does St. Mary's County, MD lose power?
- Based on EAGLE-I records, St. Mary's County, MD logged 892 distinct outage events in 2025, averaging about 3.9 hours without power per customer over the year.
- What was the worst power outage in St. Mary's County, MD?
- The largest tracked outage peaked at 20,346 customers without power, beginning September 22, 2015 and lasting about 4h.
- Is there a power outage in St. Mary's County, MD right now?
- No major outage is currently reported for St. Mary's County, MD. Live coverage depends on whether local utilities report to ODIN.
- Which utilities serve St. Mary's County, MD?
- Tracked electric providers include Southern Maryland Elec Coop Inc.
Outages are tracked at the county level; these ZIP codes fall within St. Mary's County.
20606, 20609, 20618, 20619, 20620, 20621, 20624, 20626, 20628, 20630, 20634, 20636, 20650, 20653, 20656, 20659, 20660, 20667, 20670, 20674, 20680, 20684, 20686, 20687, 20690, 20692
Electric providers serving this county
From EIA-861 service territory, with official reliability where reported.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| Southern Maryland Elec Coop Inc | 2.9 hrs | Live · total only |
Data from DOE/ORNL ODIN, DOE EAGLE-I, EIA Form 861 (utility reliability), EIA electricity retail prices and FEMA National Risk Index, every source we read. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of Maryland customers). Machine-readable data: /api/v1/counties/24037 and /api/v1/counties/24037/history.