Power Outages in Johnson County, IA
As of the latest utility report, no major power outages are reported in Johnson County, IA. In 2025, the average customer here lost power for about 1.7 hours.
Johnson County, IA is served by 2 tracked utilities.
No active power outages are currently reported in Johnson County.
- Special Weather StatementMODERATE
Johnson County has been under 4 National Weather Service alerts recently — most recently a Special Weather Statement on July 18, 2026.
- Special Weather Statement ×4
Latest Johnson County, IA outage updates
A running log of how this outage has changed — updated automatically as utilities report in.
- RESOLVED
Power restored after 43m
- OUTAGE BEGAN
Outage began — 1,462 customers out
Hardest-hit cities in Johnson County
Where this event is concentrated across the county's towns and townships.
- Iowa Cityno active outage
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.
Worst year here was 2020 (peak 51,777 customers out) · decade average 4.4 hrs without power per customer/yr.
| Year | Outage events | Peak customers out | Avg hrs/customer |
|---|---|---|---|
| 2015 | 395 | 4,054 | 0.7 |
| 2016 | 665 | 12,594 | 1.5 |
| 2017 | 757 | 42,670 | 1.9 |
| 2018 | 778 | 12,865 | 1.9 |
| 2019 | 750 | 6,942 | 1.7 |
| 2020 | 705 | 51,777 | 31.3 |
| 2021 | 717 | 5,738 | 1.5 |
| 2022 | 776 | 6,548 | 1.5 |
| 2023 | 686 | 12,293 | 2.6 |
| 2024 | 761 | 3,665 | 2.2 |
| 2025 | 752 | 8,629 | 1.7 |
What causes outages here
Share of outage-time by reported cause, from live ODIN utility reports. Why does my power keep going out? →
A reported cause is available for 1.1% of outage-time over 1 month of live data. Shares above are of the portion with a known cause.
Very High high winds exposure · 4.4 hrs/yr of outages over the last decade.
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), MIDAMERICAN ENERGY CO.
Iowa City. Outage counts for these communities are reported at the Johnson County level shown above.
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.
| Provider | Official SAIDI (EIA) | Live | Report outage |
|---|---|---|---|
| Alliant Energy (Interstate Power & Light) | — | ODIN ✓ | — |
| MIDAMERICAN ENERGY CO | — | ODIN ✓ | — |
Machine-readable data: /api/v1/counties/19103 and /api/v1/counties/19103/history. Historical figures derive from the DOE/ORNL EAGLE-I dataset (EAGLE-I tracked roughly 0% of Iowa customers).