SAIDI and SAIFI as each utility in Washington, Oregon, Idaho or Montana reported them on Form EIA-861 Schedule 3, with and without major event days, for every report year through the comparison year: one row per utility, state, year and part of the schedule (IEEE 1366 or another method), kept as published. Nothing is computed from another index and nothing is filled; the two parts are never compared, and a system average says nothing about one address.
At a glance
Period
2013–2024
One row is
utility x state x report year x reporting standard (schedule part), including the all-null row of a part not filed
Built from source rows of
utility x state x reporting standard (IEEE 1366 Part B, other method Part C) x report year
Evidence and method
reported · directSelf-reported by each utility under the method it declares. SAIDI is minutes of sustained interruption per customer over the year, SAIFI sustained interruptions per customer over the year. The form asks for SAIDI and SAIFI only; the CAIDI columns (minutes per interruption) are published with the data and kept as published, never recomputed. Part B (IEEE 1366) and Part C (other method) rows are never compared or pooled, and with- and without-major-event-day values stay separate. Form EIA-861S has no reliability schedule.
System average interruption duration index with major event days included, as the utility calculated it under the part's method.
saidi_without_med_minutes
minutes/customer/year
The same index with major event days excluded; a different question, never pooled with the value above.
saifi_with_med_interruptions
interruptions/customer/year
System average interruption frequency index with major event days included, as the utility calculated it.
saifi_without_med_interruptions
interruptions/customer/year
The same index with major event days excluded.
caidi_with_med_minutes
minutes/interruption
Average length of one interruption, major event days included: SAIDI divided by SAIFI as EIA publishes it with the data. Not a line on the form, and never recomputed here.
caidi_without_med_minutes
minutes/interruption
The same, major event days excluded.
customers
count
Customers the utility used in the calculation, as reported.
Population
What the rows are counted against
Eligible in 2024utility x state pairs with long-form EIA-861 sales rows in the comparison year, EIA's unitemized adjustment rows (utility 99999) left out; earlier years have no sales table in this build to set filers against
112 utility-states
Filed
64 utility-states57.1% of eligible
Not filed
48 utility-states
Coverage 2013–2024
1,556 rows · 82 utility states
Rows per year as the source dates them; a row without a date is its own line. For each measure: rows with a value, rows listed without one, rows where it does not apply. Counts are rows, not quantities.
Year
utility states
rows
saidi with medminutes/customer/year
saidi without medminutes/customer/year
saifi with medinterruptions/customer/year
saifi without medinterruptions/customer/year
caidi with medminutes/interruption
caidi without medminutes/interruption
customerscount
2013
59
118
581 without · 59 n/a
4415 without · 59 n/a
527 without · 59 n/a
3821 without · 59 n/a
527 without · 59 n/a
3722 without · 59 n/a
590 without · 59 n/a
2014
60
120
600 without · 60 n/a
5010 without · 60 n/a
555 without · 60 n/a
4218 without · 60 n/a
555 without · 60 n/a
4119 without · 60 n/a
600 without · 60 n/a
2015
62
124
620 without · 62 n/a
5012 without · 62 n/a
566 without · 62 n/a
4220 without · 62 n/a
566 without · 62 n/a
4220 without · 62 n/a
620 without · 62 n/a
2016
67
134
670 without · 67 n/a
5413 without · 67 n/a
598 without · 67 n/a
4621 without · 67 n/a
598 without · 67 n/a
4621 without · 67 n/a
661 without · 67 n/a
2017
67
134
670 without · 67 n/a
5512 without · 67 n/a
607 without · 67 n/a
4522 without · 67 n/a
607 without · 67 n/a
4522 without · 67 n/a
661 without · 67 n/a
2018
71
142
710 without · 71 n/a
5912 without · 71 n/a
638 without · 71 n/a
5021 without · 71 n/a
638 without · 71 n/a
5021 without · 71 n/a
710 without · 71 n/a
2019
77
154
770 without · 77 n/a
6512 without · 77 n/a
689 without · 77 n/a
5522 without · 77 n/a
689 without · 77 n/a
5522 without · 77 n/a
770 without · 77 n/a
2020
62
124
620 without · 62 n/a
539 without · 62 n/a
575 without · 62 n/a
4715 without · 62 n/a
575 without · 62 n/a
4715 without · 62 n/a
611 without · 62 n/a
2021
62
124
620 without · 62 n/a
539 without · 62 n/a
575 without · 62 n/a
4913 without · 62 n/a
575 without · 62 n/a
4814 without · 62 n/a
620 without · 62 n/a
2022
62
124
620 without · 62 n/a
557 without · 62 n/a
575 without · 62 n/a
5012 without · 62 n/a
575 without · 62 n/a
4913 without · 62 n/a
620 without · 62 n/a
2023
65
130
650 without · 65 n/a
596 without · 65 n/a
605 without · 65 n/a
5312 without · 65 n/a
605 without · 65 n/a
5213 without · 65 n/a
650 without · 65 n/a
2024
64
128
641 without · 63 n/a
605 without · 63 n/a
596 without · 63 n/a
5510 without · 63 n/a
596 without · 63 n/a
5510 without · 63 n/a
641 without · 63 n/a
By standardper year
Year
ieee standard
other standard
2013
59
59
2014
60
60
2015
62
62
2016
67
67
2017
67
67
2018
71
71
2019
77
77
2020
62
62
2021
62
62
2022
62
62
2023
65
65
2024
64
64
By part_filedper year
Year
false
true
2013
59
59
2014
60
60
2015
62
62
2016
67
67
2017
67
67
2018
71
71
2019
77
77
2020
62
62
2021
62
62
2022
62
62
2023
65
65
2024
63
65
By has_indexper year
Year
false
true
2013
59
59
2014
60
60
2015
62
62
2016
67
67
2017
67
67
2018
71
71
2019
77
77
2020
62
62
2021
62
62
2022
62
62
2023
65
65
2024
64
64
What is missing, and why
Listed without a reported value · saidi with medRows with no value for this measure; published as null, never zero
2 rows
Listed without a reported value · saidi without medRows with no value for this measure; published as null, never zero
122 rows
Listed without a reported value · saifi with medRows with no value for this measure; published as null, never zero
76 rows
Listed without a reported value · saifi without medRows with no value for this measure; published as null, never zero
207 rows
Listed without a reported value · caidi with medRows with no value for this measure; published as null, never zero
76 rows
Listed without a reported value · caidi without medRows with no value for this measure; published as null, never zero
212 rows
Listed without a reported value · customersRows with no value for this measure; published as null, never zero
4 rows
Not applicable · saidi with med, saidi without med, saifi with med, saifi without med, caidi with med, caidi without med, customersRows where part_filed is false and that carry no value; the measure does not apply to them
777 rows
Filed without the index it needsRows where the respondent completed part of the schedule for the year without a SAIDI or SAIFI value; the form asks only for what the utility calculates
1 rows
No row in the sourceLong-form respondents with sales rows in the state and no reliability row for the comparison year. The form lets a respondent answer that it does not calculate the indices, and a supplier with no distribution system has none to report; the published data does not say which: 2024
48 utility-states
Not applicableUtility x state pairs that filed Form EIA-861S for the comparison year: the short form has no reliability schedule: 2024
80 utility-states
Outside the atlas frameEIA-861 reliability rows for states outside Washington, Oregon, Idaho and Montana, all years
24,278 source rows
How often it changes
Checked 2026-09-21
Publisher
Form EIA-861 is EIA's Annual Electric Power Industry Report, a census of all United States electric utilities. Its page lists releases of two kinds: early release data and final data.www.eia.gov/electricity/data/eia861/ ↗
Delay
On the checked date EIA's page gave a release date of August 4, 2026 for early release data and listed the next release as October 2026 for final data; its file list marked 2025 as early release and 2024 as final data, updated December 3, 2025.www.eia.gov/electricity/data/eia861/ ↗
This atlas
The atlas reads EIA-861 through PUDL, which Catalyst Cooperative publishes as quarterly versioned releases. Each atlas release pins one PUDL version, named under edition; the table changes only when that pin moves. No timed refresh.docs.catalyst.coop/pudl/en/v2026.9.0/data_access.html ↗
No corrections apply to this dataset in this release. Earlier editions: not available (earlier releases did not retain per-dataset edition comparisons).