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Power Outages in Johnson County, IA

Corridor Energy Cooperative, East-Central Iowa Rural Elec Coop, Eastern Iowa Light & Power Coop, Farmers Electric Coop - (IA), Interstate Power and Light Co, MidAmerican Energy Co and T I P Rural Electric Coop publish only a system-wide total, not county figures. There is no live feed for Alliant Energy (Interstate Power & Light). In 2025, the average customer here lost power for about 1.7 hours.

Johnson County, IA is served by 8 tracked utilities.

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MassOutage

MassOutage, "Power Outages in Johnson County, IA". https://massoutage.com/iowa/johnson-county

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Johnson County, IA
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No outages reported (partial view)

Corridor Energy Cooperative, East-Central Iowa Rural Elec Coop, Eastern Iowa Light & Power Coop, Farmers Electric Coop - (IA), Interstate Power and Light Co, MidAmerican Energy Co and T I P Rural Electric Coop publish no county-level figures.

No live feed for Alliant Energy (Interstate Power & Light): outages in itsservice area won't show here.

Live status by utility · Johnson County

0.0%of this county's ~101,234 customers are served by utilities with a county-level live feed.

Blind spots

We can't see outages for: Alliant Energy (Interstate Power & Light). Their customers are not in any number on this page; check their own outage maps.

System-wide total only, no county split: Corridor Energy Cooperative, East-Central Iowa Rural Elec Coop, Eastern Iowa Light & Power Coop, Farmers Electric Coop - (IA), Interstate Power and Light Co, MidAmerican Energy Co, T I P Rural Electric Coop.

UtilityFeedOutServed% outSmall outagesIncidentsUtility ETRAs of
Corridor Energy CooperativeLive · total onlynot by county------
East-Central Iowa Rural Elec CoopLive · total onlynot by county------
Eastern Iowa Light & Power CoopLive · total onlynot by county------
Farmers Electric Coop - (IA)Live · total onlynot by county------
Interstate Power and Light CoLive · total onlynot by county------
MidAmerican Energy CoLive · total onlynot by county------
T I P Rural Electric CoopLive · total onlynot by county------
Alliant Energy (Interstate Power & Light)No live feedcan't see------

Electricity-dependent residents

HHS emPOWER · data October 7, 2026

Medicare beneficiaries in Johnson 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.

Power-dependent
758
Oxygen service
160
Dialysis (facility)
132
Home health / hospice
165
By ZIP code (12)
ZIPPower-dependentVentilatorsO2 concentratorsHome dialysis
52240175≤11119≤11
52241103≤1166≤11
5224582≤1150≤11
5231781≤11620
5224677≤1145≤11
5233348≤1135≤11
5224723≤11180
5234021≤11150
5233818≤11120
52755160≤11≤11
5232215≤11120
52235≤110≤110

Emergency managers can request identified beneficiary lists through their state health department via the HHS emPOWER program.

🔔 Alerts for Johnson County, IA

Outage began, grew, restoration estimate changed, restored: by email, Slack, Teams, Discord or signed webhook, for Johnson County or any town and utility in it.

Get alerts for Johnson CountySend updates to your dashboardRSS feed
◢ ACTIVE WEATHER ALERTS · NWS

No active NWS alerts for Johnson County right now.

Recent NWS alert activity · Johnson County

Johnson County has been under 71 National Weather Service alerts recently, most recently a Freeze Warning on October 17, 2026.

  • Flood Warning ×31
  • Flood Watch ×19
  • Flash Flood Warning ×8
  • Severe Thunderstorm Warning ×4
  • Special Weather Statement ×4
  • Freeze Warning ×3

Latest Johnson County, IA outage updates

A running log of how this outage has changed, updated automatically as utilities report in.

  1. RESOLVED

    Power restored after 2h 21m

  2. IMPROVING

    Improving: down to 3,724 customers out

  3. OUTAGE BEGAN

    Outage began: 8,007 customers out (10% of the county)

  4. RESOLVED

    Power restored after 1h 11m

  5. OUTAGE BEGAN

    Outage began: 2,584 customers out (3.3% of the county)

Outage trend · Johnson County, IA
0customers out · peak 38
Data as of Oct 15, 2026 00:30 UTC
Johnson County, IA: customers without power, last 24 hoursPeak 38 customers out; latest 0 as of Oct 15, 2026 00:30 UTC. Each point is the highest reading in its interval.010203040Oct 146 AM12 PM6 PM
Use the arrow keys to read values.
Times in EDT. Shaded stretches had no reading.

Hardest-hit cities in Johnson County

Where this event is concentrated across the county's towns and townships.

  • Iowa Cityno outage reported

Historical reliability

In 2025, the average customer in Johnson County went about 1.7 hours without power. Peak simultaneous outage on record reached 51,777 customers.

Official state benchmark (EIA 2025)Source: US EIA

The US EIA reports Iowa utilities averaged 3.1 hrs without power per customer (SAIDI) in 2025, a cross-check on our county estimate of 1.7 hrs.

A decade of outages (2015–2025)
avg hrs without power / customer
Johnson County average outage hours per customer by year2015–2025: 2015 0.7h, 2016 1.5h, 2017 1.9h, 2018 1.9h, 2019 1.7h, 2020 31.3h, 2021 1.5h, 2022 1.5h, 2023 2.6h, 2024 2.2h, 2025 1.7h. Highlighted: 2020.0102030400.7h20151.5h20161.9h20171.9h20181.7h201931.3h20201.5h20211.5h20222.6h20232.2h20241.7h2025
Use the arrow keys to read values.

Worst year here was 2020 (peak 51,777 customers out) · decade average 4.4 hrs without power per customer/yr.

YearOutage eventsPeak customers outAvg hrs/customer
20153954,0540.7
201666512,5941.5
201775742,6701.9
201877812,8651.9
20197506,9421.7
202070551,77731.3
20217175,7381.5
20227766,5481.5
202368612,2932.6
20247613,6652.2
20257528,6291.7

Cost of power in Johnson County

ENERGY & AI DEMAND →

Estimated residential electricity price for Johnson 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.

12.3¢/kWh
estimated residential average
▲ 17% since 2015
vs Iowa avg 16.0¢
vs US avg 20.0¢
BY UTILITY · RESIDENTIAL ¢/kWh

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.

What causes outages here

Share of outage-time by reported cause, from live ODIN utility reports. Why does my power keep going out? →

Outage causes by share of outage-timeEquipment failure 100%Equipment failureEquipment failure100%
Use the arrow keys to read values.
A reported cause is available for 0.1% of outage-time over 2 months of live data. Shares are of the portion with a known cause; bars are scaled to the largest cause.
Worst recorded outages
STARTEDPEAK OUTDURATION
August 10, 202051,77712d 21h
March 10, 201742,6702h 15m
July 9, 201718,1673h 15m
November 5, 201812,86515h 30m
October 11, 201612,5946h
See the biggest power outages in US history →
Natural hazards & outage risk
HIGH

Very High high winds exposure · 4.4 hrs/yr of outages over the last decade.

Strong windVery High
TornadoRelatively High
Ice stormRelatively Moderate
FloodingRelatively Moderate
Heat waveRelatively Moderate
All hazard rankings →

Power outages in Johnson County: FAQ

How often does Johnson County, IA lose power?
Based on EAGLE-I records, Johnson County, IA logged 752 distinct outage events in 2025, averaging about 1.7 hours without power per customer over the year.
What was the worst power outage in Johnson County, IA?
The largest tracked outage peaked at 51,777 customers without power, beginning August 10, 2020 and lasting about 12d 21h.
Is there a power outage in Johnson County, IA right now?
No major outage is currently reported for Johnson County, IA. Live coverage depends on whether local utilities report to ODIN.
Which utilities serve Johnson County, IA?
Tracked electric providers include Alliant Energy (Interstate Power & Light), Corridor Energy Cooperative, East-Central Iowa Rural Elec Coop, Eastern Iowa Light & Power Coop, Interstate Power and Light Co, MidAmerican Energy Co.
Nearby counties
Benton CountyCedar CountyIowa CountyLinn County
Cities & towns in Johnson County

Iowa City. Outage counts for these communities are reported at the Johnson County level shown above.

ZIP codes in Johnson County

Outages are tracked at the county level; these ZIP codes fall within Johnson County.

52235, 52240, 52241, 52242, 52245, 52246, 52247, 52317, 52322, 52333, 52338, 52340, 52755

Electric providers serving this county

From EIA-861 service territory, with official reliability where reported.

ProviderOfficial SAIDI (EIA)LiveReport outage
MidAmerican Energy Co3.6 hrsLive · total only-
Eastern Iowa Light & Power Coop1.5 hrsLive · total only-
East-Central Iowa Rural Elec Coop1.1 hrsLive · total only-
Corridor Energy Cooperative2.3 hrsLive · total only-
Interstate Power and Light Co-Live · total only-
Alliant Energy (Interstate Power & Light)-No live feed-
T I P Rural Electric Coop-Live · total only-
Farmers Electric Coop - (IA)-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 Iowa customers). Machine-readable data: /api/v1/counties/19103 and /api/v1/counties/19103/history.