Mercer County, IL Power Outages
Only some utilities serving Mercer County, Illinois share live outage data (MidAmerican Energy Co), and none of them report outages here right now. Ameren Illinois Company does not share live data, so check its outage map for real-time status.
Mercer County on the Illinois outage map
- Normal
- Minor
- Moderate
- Major
- Severe
- Limited data
Current outages
Weather alerts
No active outage-relevant weather alerts from the National Weather Service.
Mercer County power outage history
Every significant outage recorded in Mercer County since late 2014, with likely causes from NOAA storm reports
Since late 2014, DOE's EAGLE-I monitoring system has recorded 254 significant power outages in Mercer County, meaning events that left at least 1% of customers in the dark. The largest (Feb 12–14, 2019) came when an ice storm left 6,907 customers (77% of the county) without power.
From 2018 to 2025, the average customer here lost about 17 hr 7 min of power per year, more than the Illinois average of 2 hr 57 min. That ranks 1st of 102 Illinois counties for outage time, where 1st has the most.
August is the riskiest month: it accounted for 41% of all customer outage time from 2018 to 2025. On 118 days in that period, at least 5% of customers were out at the same time. Outage time in Mercer County has risen recently: about 25 hr 16 min per customer per year in 2022–2025, versus 8 hr 57 min in 2018–2021.
The most recent significant outage on record (Dec 29, 2025) affected 344 customers (3.8%) amid a winter storm.
Worst outages on record
| # | When | Peak customers out | Days | Likely cause (NOAA) |
|---|---|---|---|---|
| 1 | Feb 12–14, 2019 | 6,907(77%) | 3 | Ice storm |
| 2 | Oct 22–23, 2015 | 6,308(70.3%) | 2 | No major storm reported |
| 3 | Jan 2, 2019 | 6,182(68.9%) | 1 | Flooding |
| 4 | Dec 27–30, 2015 | 5,927(66.1%) | 4 | Ice storm |
| 5 | Dec 29, 2020 – Jan 1, 2021 | 5,250(58.5%) | 4 | Winter storm |
Hours without power per customer, by year
When outages happen
Source: DOE/ORNL EAGLE-I recorded electricity outages, 2014–2025 (CC BY 4.0), with likely causes from the NOAA NCEI Storm Events Database. EAGLE-I coverage was partial before 2018, so averages use 2018–2025. Peak counts are the highest number of customers out at one time.
Who provides electricity in Mercer County?
Electric companies with service territory in Mercer County (EIA-861, 2025)
| Utility | Type | Customers (IL) | Avg. outage time / yr | Live data |
|---|---|---|---|---|
| Ameren Illinois | Investor Owned | 1,251,245 | Not reporting | |
| MidAmerican Energy | Investor Owned | 86,395 | Reporting |
Customer counts are each utility's statewide total in Illinois. Source: U.S. Energy Information Administration, Form EIA-861 & Electric Power Annual.
Local outage news
No Mercer County outage headlines in the past week.
Mercer County power outage FAQ
Is the power out in Mercer County right now?
No outages are currently reported for Mercer County by participating utilities. Live coverage is limited here, so If your power is out, report it to your electric company.
Which electric company serves Mercer County?
According to EIA-861 service territory data, Ameren Illinois Company, MidAmerican Energy Co provide electric service in Mercer County, Illinois.
What was the worst power outage in Mercer County?
The largest outage recorded by DOE's EAGLE-I system since 2014 was Feb 12–14, 2019. It peaked at 6,907 customers without power (77% of the county). NOAA storm reports for that period point to ice storm.
How often does the power go out in Mercer County?
EAGLE-I has recorded 254 significant outages here since late 2014. From 2018 to 2025 the average customer lost about 17 hr 7 min of power per year, and on 118 days at least 5% of customers were out at once.
Cite this page
You may reuse our derived data under CC BY 4.0 with attribution. Underlying government data is public domain.
PowerOutageTracker.com. "Mercer County, IL Power Outages." Accessed November 3, 2026. https://poweroutagetracker.com/outages/illinois/mercer-county