Independent profile. Kilowatt Atlas is not affiliated with Washington-St. Tammany Electric Cooperative, does not use its logo or branding and cannot take payments, start service or look up accounts. Figures come from public federal data for 2025.
Residential customers
51 thousand
51,187 homes
Average price
11.04 cents
Louisiana average 12.52
Average bill
$146.02
Per month at 1,323 kWh
Price rank
4 of 17
Lowest to highest in Louisiana
Washington-St. Tammany Electric Cooperative rates and average bill
Washington-St. Tammany Electric Cooperative reported 51,187 residential customers on bundled service in 2025, using 1,323 kWh a month on average at 11.04 cents per kWh. Bundled means the utility supplies the energy and delivers it, so the price covers both. Among the 17 Louisiana utilities with at least 10,000 bundled residential customers, Washington-St. Tammany Electric Cooperative ranks 4 from the lowest price.
| Average | Cents per kWh | kWh per month | Monthly bill |
|---|---|---|---|
| Washington-St. Tammany Electric Cooperative | 11.04 | 1,323 | $146.02 |
| Louisiana (all utilities) | 12.52 | 1,225 | $153.32 |
| United States | 17.23 | 874 | $150.68 |
Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data), sales to ultimate customers. Price is revenue divided by sales and includes fixed charges.
Service area
EIA lists the counties where Washington-St. Tammany Electric Cooperative has distribution equipment. That covers 3 counties in Louisiana. A county can be served by more than one utility, so confirm your address with the utility or your bill.
Louisiana (3 counties)
St Tammany, Tangipahoa, Washington
Not sure who serves your address? Use find my electric company.
Reliability
For 2025, Washington-St. Tammany Electric Cooperative reported an average of 484 minutes without power per customer and 4.79 interruptions per customer, with major event days left out. The typical interruption lasted about 101 minutes. For comparison, the median state averaged 127 minutes of outage per customer.
Washington-St. Tammany Electric Cooperative had about 357 more minutes of outage per customer than the median state. The Louisiana figure across its utilities was 227 minutes. One interruption lasting 101 minutes and 4.79 interruptions a year per customer add up to the 484 minute total.
Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data), reliability schedule, measured under IEEE 1366. Utilities define events slightly differently, so compare with care.
Rate options and rooftop solar
- Time-of-use pricing. Washington-St. Tammany Electric Cooperative does not report a residential time-of-use program in its 2025 EIA filing. Ask the utility, because programs change. How time-of-use rates work.
- Rooftop solar and net metering. EIA shows 658 residential net-metered systems on the Washington-St. Tammany Electric Cooperative grid in 2025, with 4.5 megawatts of capacity. How net metering works.
Who owns and regulates it
Owned by the members it serves. An elected board sets the rates, and members may receive capital credits when the co-op has margins to return.
For questions about state consumer protections, see the Louisiana Public Service Commission.
Washington-St. Tammany Electric Cooperative is an electric cooperative based in Louisiana.
Washington-St. Tammany Electric Cooperative operates in the MISO power market. Power markets set wholesale costs, but your retail rate is set by the rules described above.
Washington-St. Tammany Electric Cooperative compared with Louisiana
Louisiana has 19 utilities with residential customers in the 2025 EIA data. Washington-St. Tammany Electric Cooperative is 8th by size and serves about 2.4% of the state's homes. Among 9 other cooperatives in Louisiana, the median price is 13.15 cents per kWh, so Washington-St. Tammany Electric Cooperative at 11.04 cents is 2.11 cents below its peers. At $146.02 a month, an average Washington-St. Tammany Electric Cooperative home pays about $88 a year less than the Louisiana average of $153.32, and uses 98 kWh a month more. Washington-St. Tammany Electric Cooperative lists distribution equipment in 3 counties, so check your county and your bill before you assume it serves you. 658 of its residential customers use net metering, or 12.9 per 1,000 homes, against 17.2 for Louisiana as a whole.
Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Peers are other utilities of the same type in Louisiana with at least 1,000 residential customers and a reported price.
Other Louisiana utilities
| Utility | Type | Homes | Cents per kWh |
|---|---|---|---|
| Washington-St. Tammany Electric Cooperative | Cooperative | 51,187 | 11.04 |
| Southwest Louisiana Electric Membership Corporation | Cooperative | 109,628 | 11.57 |
| City of Lafayette | Municipal | 60,634 | 11.51 |
| Beauregard Electric Cooperative | Cooperative | 40,452 | 13.14 |
| Claiborne Electric Cooperative | Cooperative | 21,354 | 13.32 |
| City of Alexandria | Municipal | 19,425 | 11.05 |
See every one on the electric companies in Louisiana page.
Official site and where to get help
Kilowatt Atlas is not Washington-St. Tammany Electric Cooperative and does not take payments, start service or manage accounts. To pay a bill, report an outage or start service, use the website, app or phone number printed on your bill. Be careful with search ads and lookalike sites that offer to pay your bill for a fee.
- Want to understand a line on your bill? Read how to read your electric bill.
- Think your bill is high? Try the bill checker.
Washington-St. Tammany Electric Cooperative questions
What is the average residential electric rate for Washington-St. Tammany Electric Cooperative?
Washington-St. Tammany Electric Cooperative residential customers on bundled service paid an average of 11.04 cents per kWh in 2025, with average use of 1,323 kWh a month and an average bill of $146.02 (EIA Form EIA-861). The Louisiana average was 12.52 cents.
How many customers does Washington-St. Tammany Electric Cooperative have?
EIA reports about 51,187 residential customers for Washington-St. Tammany Electric Cooperative in 2025.
Who regulates Washington-St. Tammany Electric Cooperative?
Owned by the members it serves. An elected board sets the rates, and members may receive capital credits when the co-op has margins to return. See the regulator for Louisiana on the Louisiana state page.
How reliable is Washington-St. Tammany Electric Cooperative?
For 2025, Washington-St. Tammany Electric Cooperative reported an average of 484 minutes of outage per customer and 4.79 interruptions per customer, excluding major event days (IEEE 1366). Utilities measure outages in slightly different ways, so compare with care.