Louisiana · Cooperative
Washington-St Tammany E C, Inc
11.04¢ per kWh, bundled, EIA-861 2025. Average bill $146.02 at 1,323.0 kWh a month, across 51,187 customers on that row.
Louisiana averaged 12.52¢/kWh and $153.32 a month. The United States averaged 17.23¢/kWh and $150.68. State and national figures come from EIA's Average Bill file.
Revenue divided by sales, EIA-861 Sales to Ultimate Customers, 2025, released October 7, 2026. Texas wires utilities come from the Delivery Companies file. The price and bill use bundled service. Customer count: 51,187, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$110.40
11.04¢/kWh × 1,000 kWh. Bundled residential average, EIA-861 2025. The customer charge is already folded into this average, so it stands beside a tariff total rather than being added to it.
Annual history
| Year | ¢/kWh | Avg. bill | Avg. kWh | Customers |
|---|---|---|---|---|
| 2015 | 9.19¢ | $128.11 | 1,393.6 | 46,826 |
| 2016 | 9.49¢ | $128.02 | 1,348.7 | 47,270 |
| 2017 | 9.54¢ | $127.13 | 1,333.0 | 46,826 |
| 2018 | 9.39¢ | $129.38 | 1,377.5 | 48,182 |
| 2019 | 9.56¢ | $128.02 | 1,339.1 | 48,578 |
| 2020 | 9.13¢ | $119.87 | 1,312.7 | 49,012 |
| 2021 | 9.62¢ | $122.29 | 1,271.4 | 49,651 |
| 2022 | 11.06¢ | $149.38 | 1,350.9 | 50,076 |
| 2023 | 10.76¢ | $142.51 | 1,324.1 | 50,577 |
| 2024 | 11.85¢ | $153.21 | 1,293.0 | 50,901 |
| 2025 | 11.04¢ | $146.02 | 1,323.0 | 51,187 |
EIA-861, 2015–2025, using the same service type as the 2025 figure. A blank year means that service was not in the file.
Counties
St Tammany, Tangipahoa, Washington.
EIA-861 Service Territory, 2025. A listed county is the county EIA recorded. It does not mean every address in the county is served. Open this utility in the bill calculator · Rate history tool