Avista Corp electricity: 274,115 accounts in Washington, SAIDI 112

In Washington, Avista Corp bills 274,115 accounts, 89.8% residential, as an investor owned utility. 99% of its home meters are advanced (AMI), against 69% across Washington.

The Avista (formerly Washington Water Power) Post Street substation — PostStreetSubstation 20070317. Photo by Mark Wagner, CC BY 2.5, Wikimedia Commons. Illustrative, not a listed utility's plant.

At 901 kWh a month a Avista Corp home pays about $107 in energy: 11.87 ¢/kWh, 0.3% below the Washington average of 11.90 ¢.

99% of its home meters are advanced (AMI), against 69% across Washington.

Avista Corp: smart meters and rate options

Home meters that are AMI: 99%Washington utilities overall: 69%

Metering is where Avista Corp differs: 237,147 of 239,229 home meters are AMI, 99.1%, place 9 of 16 Washington utilities that report; the Washington figure for all utilities is 69.4%. It does not offer a time-of-use rate to homes in the EIA filing.

How it compares

Avista Corp
Avista Corp, 2024	Home	Business	Bill	SAIDI
Avista Corp	11.87 ¢/kWh	12.77 ¢/kWh	$107at 901 kWh	112 minSAIDI
Washington average against this company, which is 14 of 18 on price	+0.03 ¢/kWhcompany 0.3% below	-2.78 ¢/kWhcompany 27.9% above	+$0a month at 901 kWh	+34 mincompany 34 below
PUD No 1 of Snohomish CountyLowest in this table	11.51 ¢/kWhcompany 3.1% above	9.45 ¢/kWhcompany 35.2% above	$1043 less than company	181 mincompany 69 below

Compare 35 Washington companies

Avista Corp: 2025

No 2025 early-release row for Avista Corp; 2024 stays the latest year.

Avista Corp 2024 against Washington 2025: -1.24 ¢11.87 ¢ for Avista Corp in 2024, 13.11 ¢ for Washington in 2025

EIA's early release leaves Avista Corp out for 2025. Its newest record stays 2024: 11.87 ¢/kWh across 246,055 home accounts and 112 minutes of SAIDI.

Carbon context

Avista Corp serves 246,055 homes in Washington. At 901 kWh a month that is about 108 kg of CO₂, or 1,301 kg a year, at the Washington plant rate, state generation and not this utility: Washington generation mix.

Avista Corp charts

Residential price since 2015: 11.87 ¢ in 2024

9.35 ¢ in 2015, 11.87 ¢ in 2024 (+26.9%); Washington 9.09 to 11.90 ¢.

Avista Corp residential price 2015-2024, 2015 to 2024: 10 rows

Year	Avista Corp	Gap to Washington residential	Gap to U.S. residential
2015	9.35	+0.26	-3.30
2016	9.65	+0.17	-2.90
2017	9.97	+0.31	-2.92
2018	10.15	+0.40	-2.72
2019	9.86	+0.15	-3.15
2020	9.89	+0.02	-3.26
2021	10.00	-0.11	-3.66
2022	10.04	-0.22	-5.00
2023	10.78	-0.20	-5.22
2024	11.87	-0.03	-4.61

10 rows from EIA retail sales.

CSV

Avista Corp SAIDI, 2016-2024

127 min in 2016, 112 in 2024.

Avista Corp SAIDI by year, 2016 to 2024: 9 rows

Year	Avista Corp, no major events
2016	127
2017	143
2018	117
2019	121
2020	122
2021	147
2022	136
2023	87
2024	112

9 rows from EIA-861 survey.

CSV

Reliability: SAIDI 112.0 min

112.0 min, 1.13x the median reporter, rank 372 of 673.

min

Company, no major events112.0
Company, with major events152.0

Avista Corp, Reliability: EIA-861 survey.

CSV

Analyst note

Avista Corp billed homes 9.35 ¢/kWh in 2015 and 11.87 ¢ in 2024, +26.9% in all, and lagged the Washington average (+30.9%) by 4.0 points. Avista Corp's sharpest move came in 2024, +10.1%. The latest year is the high at 11.87 ¢; the low was 9.35 ¢ (2015). 2024: +10.1% here, +8.4% for the Washington average. SAIDI at Avista Corp (major events excluded) went from 127 minutes in 2016 to 112 in 2024, -12%, between 87 (2023) and 147 (2021). At 112 minutes in 2024, Avista Corp sat +13 from the national SAIDI median, with 1 of 9 years below it. 2021: 548 minutes with major events, 147 without, the widest gap of any year. Avista Corp has 13 cheaper and 4 higher-priced Washington peers among 18 with 20,000+ homes. Next cheaper, PUD No 1 of Clallam County, bills 11.85 ¢ (-0.02). Next higher-priced, PUD No 1 of Grays Harbor County, bills 12.52 ¢ (+0.65).

Both measures are ordinary, -0.3% on price against Washington and 1.13x on outage minutes against the nation.

Home accounts at Avista Corp went from 220,344 in 2015 to 246,055 in 2024, +11.7%. Business customers paid 1.08 times the home price in 2024 (12.77 against 11.87 ¢); the ratio was 1.08 in 2015. SAIFI went from 0.83 in 2016 to 0.82 in 2024, between 0.71 and 1.11.

Outages and home price of Avista Corp (EIA utility 20169), 2013 to 2024

Avista Corp customers lost power for 112 minutes in 2024, down from 127 in 2016 (−12%). The low came in 2023 at 87, the high in 2021 at 147; 9 years were filed. The Washington median in 2024 was 136 minutes, so Avista Corp ran below it.

Measured in 2025 dollars, Avista Corp home rates went 12.26 ¢ to 12.18 ¢ (−0.7%) from 2013 to 2024; on the bill 8.87 ¢ to 11.87 ¢. Over 12,000 kWh a year the real price meant $1,471 in 2013 and $1,461 in 2024. Of 37 Washington utilities with 1,000+ home accounts in 2024, Avista Corp stood 29th cheapest (35th of 46 in 2013).

Avista Corp outage minutes a customer, 2016 to 2024: 112 in 2024

Avista Corp at 112 min in 2024 and the Washington median at 136.

Avista Corp home price since 2013: −0.7% after inflation

Avista Corp: 12.18 ¢ in 2025 dollars (solid) and 11.87 ¢ as billed (dashed) in 2024.

Avista Corp, EIA utility 20169, year by year among Washington utilities

Avista Corp 2013-2024: 12 rows

Year, Avista Corp	¢ billed	¢ in 2025 $	Price place, Avista Corp	SAIDI min	SAIFI	SAIDI place, Avista Corp	Washington median SAIDI
2013	8.87	12.26	35 of 46	–	–	–	–
2014	9.15	12.44	36 of 46	–	–	–	–
2015	9.35	12.70	34 of 46	–	–	–	–
2016	9.65	12.94	36 of 46	127	0.83	9 of 14	94
2017	9.97	13.09	35 of 46	143	0.87	10 of 14	122
2018	10.15	13.02	34 of 46	117	0.79	9 of 17	117
2019	9.86	12.42	34 of 53	121	0.82	12 of 19	91
2020	9.89	12.30	23 of 37	122	0.85	9 of 18	122
2021	10.00	11.88	24 of 37	147	1.11	11 of 18	122
2022	10.04	11.05	24 of 37	136	0.84	10 of 19	136
2023	10.78	11.39	29 of 38	87	0.71	7 of 20	104
2024	11.87	12.18	29 of 37	112	0.82	9 of 21	136

Avista Corp, EIA utility 20169: EIA-861, CPI-U.

CSV

SAIDI explained, Washington real prices.

Facts

Customer accounts: 274,1157.2% of Washington total
Residential accounts: 246,0557.3% of Washington homes
Commercial accounts: 27,2499.9% of the base
Residential rate: 11.87 ¢/kWhplace 14 of 18, -0.3% against the state
Commercial rate: 12.77 ¢/kWhplace 28 of 31, +27.9% against the state
SAIDI, no major events: 112.0 minbetter than 45% of reporters
SAIFI, no major events: 0.820.81x the median
SAIDI with major events: 152.0 min26.3% from event days
Net-metered capacity: 32.5 MW4,660 installations
Counties served: 9Washington plus 2 more
Average residential use: 10,815 kWh/yr901 a month
Implied monthly bill: $107-$42 on the U.S. rate, 901 kWh
Residential rate since 2015: +26.9%9.35 to 11.87 ¢/kWh
SAIDI trend: -12%127 min in 2016, 112 in 2024

Data tables

2024 by sector, Avista Corp

Avista Corp sector	Accounts	Rate ¢/kWh	Gap to Washington ¢/kWh
Residential	246,055	11.87	-0.03
Commercial	27,249	12.77	+2.78

Year by year, Avista Corp

Year	Home accounts, Avista Corp	Home ¢	Business ¢	Ratio	SAIDI	SAIFI
2015	220,344	9.35	10.14	1.08	No data	No data
2016	221,829	9.65	10.17	1.05	127	0.83
2017	224,696	9.97	10.18	1.02	143	0.87
2018	227,866	10.15	10.48	1.03	117	0.79
2019	230,749	9.86	10.68	1.08	121	0.82
2020	232,273	9.89	10.97	1.11	122	0.85
2021	237,083	10.00	11.17	1.12	147	1.11
2022	239,958	10.04	11.47	1.14	136	0.84
2023	243,524	10.78	11.97	1.11	87	0.71
2024	246,055	11.87	12.77	1.08	112	0.82

Peers of Avista Corp in Washington, place 14 of 18 on home price

Utility near Avista Corp on price	SAIDI min, gap to Avista Corp	Home ¢, gap to Avista Corp	Gap % to Avista Corp	Accounts, Avista Corp = 1
11. City of Tacoma	-32	-1.05	-8.9%	0.74
12. PUD No 1 of Snohomish County	+69	-0.35	-3.0%	1.39
13. PUD No 1 of Clallam County	No data	-0.02	-0.1%	0.12
14. Avista Corp (this utility)	112	11.87	-	1.00
15. PUD No 1 of Grays Harbor County	+90	+0.65	+5.5%	0.17
16. PUD No 3 of Mason County	No data	+1.93	+16.2%	0.13
17. City of Seattle	-1	+2.22	+18.7%	1.87

Who buys Avista Corp's electricity

Class at Avista Corp	Accounts	Of Avista Corp accounts	Of Avista Corp MWh sold	kWh a year per Avista Corp account
Residential	246,055	89.8%	45.3%	10,815
Commercial	27,249	9.9%	36.6%	78,981
Industrial and other	811	0.30%	18.2%	1,316,244

Avista Corp among Washington investor owneds

Avista Corp and its neighbours on price	SAIDI min, gap to Avista Corp	Home ¢, gap to Avista Corp	Accounts, Avista Corp = 1
1. Avista Corp (WA, this utility)	112	11.87	1.00
2. Puget Sound Energy Inc (WA)	+91	+2.77	4.52

Avista Corp: meters, rate options and solar

Measure	Avista Corp	Washington context	Avista Corp detail
Avista Corp home meters on AMI	99.1%	Washington 69.4%	237,147 of 239,229 meters
Home meters, AMR (drive-by read)	36	Washington figure not published	0.0% of meters
Time-of-use rate for Avista Corp homes	Not on file	4 of 8 Washington utilities offer one	no dynamic-pricing count filed by Avista Corp
Net-metered installations	4,660	95% residential	18.1 homes per 1,000 accounts, 7.0 kW average

Monthly energy cost by use, Avista Corp

kWh	Share of a 901 kWh month	Cost a month at 11.87 ¢	vs U.S.	Cost a year
250	28%	$29.67	-$11.53	$356
500	55%	$59.33	-$23.07	$712
750	83%	$89.00	-$34.60	$1,068
1,000	111%	$118.67	-$46.13	$1,424
1,500	166%	$178.00	-$69.20	$2,136
2,000	222%	$237.33	-$92.27	$2,848

Outage record, Avista Corp

Measure, Avista Corp	No events	All events	Converted
SAIDI minutes	112.0	152.0	1.87 h
SAIFI interruptions	0.820	0.960	1.22 yr apart
CAIDI minutes	136.6	158.3	2.28 h

Territory of Avista Corp

9 Washington counties plus 2 other states, region WECC:

Washington other states: 19 of 19 counties of Avista Corp drawn

Avista Corp: 19 counties listed by EIA-861, Census 2023 outlines.

CSV

County list

Adams
Asotin
Ferry
Grant
Lincoln
Pend Oreille
Spokane
Stevens
Whitman

Questions on Avista Corp

How big is Avista Corp in Washington, by customer accounts?

274,115 accounts in 2024: residential 246,055, commercial 27,249, industrial 811.

How many cents per kWh does Avista Corp charge homes?

In 2024 homes paid 11.87 cents; against the Washington average that is -0.3%.

What are the SAIDI and SAIFI of Avista Corp?

SAIDI 112.0 min and SAIFI 0.82 a year, major events excluded; ratio to the national median 1.13, CAIDI 137 min.

How many net-metered systems connect to Avista Corp?

4,660 installations with 32.5 MW, of which residential installations number 4,445.

What would a typical Avista Corp home pay each month?

901 kWh at 11.87 cents comes to about $107, energy only.

Is Avista Corp cheaper than other Washington utilities?

Rank 14 of 18 in Washington on price, -0.3% against the state average; 13 charge less than 11.87 ¢.

How much of the Avista Corp load is business?

Homes take 45.3% of 5,880,681 MWh, commercial accounts 36.6%, industrial and other 18.2%; the 27,249 commercial accounts use 78,981 kWh each, 7.3 times a home.

Does Avista Corp have smart meters or TOU rates?

237,147 of 239,229 home meters are AMI, 99.1%. Avista Corp reports no home time-of-use rate; 4 of 8 Washington filers do.

Since 2015, has Avista Corp become cheaper than other Washington utilities?

13th cheapest of 18 in 2015, 14th of 18 in 2024; its price rose 26.9% while Washington rose 30.9%.

Has Avista Corp filed 2025 data with EIA?

Its latest filing year is 2024, with 112 SAIDI minutes and 11.87 cents for homes.

Utilities with a similar home price

Home prices nearest to Avista Corp at 11.87 ¢/kWh in 2024, among companies with a page here, any state.

Washington-St Tammany E C, IncLouisiana, 11.85 ¢/kWh, 0.02 ¢ below
Dixie Electric Membership CorpLouisiana, 11.91 ¢/kWh, 0.04 ¢ above
City of MariettaGeorgia, 11.93 ¢/kWh, 0.06 ¢ above

Rate plans on file

5 home plan records, energy charges: 8.3 to 16.7 ¢/kWh.

Tiered: 5, e.g. 22 Residential and Farm Large General Service - Secondary
Demand charge: 4, e.g. 22 Residential and Farm Large General Service - Secondary

Who offers time-of-use and tiered rates (17 Apr 2026 snapshot).

Primary sources for Avista Corp electricity: 274,115 accounts in Washington, SAIDI 112

EIA-861 annual report entry for Avista Corp electricity: 274,115 accounts in Washington, SAIDI 112, customers and sales
EIA-861 form instructions for Avista Corp electricity: 274,115 accounts in Washington, SAIDI 112, how a customer is counted
EIA state profiles for Avista Corp electricity: 274,115 accounts in Washington, SAIDI 112, the state price average