PUD No 3 of Mason County
Political Subdivision electric utility · Washington · #454 of 3,199 U.S. utilities by customers · EIA utility #15419
PUD No 3 of Mason County is a political subdivision electric utility serving 36,818 customers in Washington. In 2025 it sold 692 gigawatt-hours of electricity for $88.90M in revenue, an average realized rate of 12.85¢ per kWh across all customer classes and 14.45¢ per kWh for residential customers. Its reported service territory covers 4 counties. EIA records its activities as: transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 34,378 | 464 | $67.04M | 14.45¢ | |
| Commercial | 2,439 | 183 | $18.51M | 10.11¢ | |
| Industrial | 1 | 44.6 | $3.35M | 7.52¢ | |
| Total | 36,818 | 692 | $88.90M | 12.85¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (1,125 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 35,082 | 675 | $71.02M | 11.35¢ |
| 2022 | 35,525 | 705 | $76.88M | 11.80¢ |
| 2023 | 35,985 | 695 | $80.92M | 12.70¢ |
| 2024 | 36,407 | 682 | $85.22M | 13.79¢ |
| 2025 | 36,818 | 692 | $88.90M | 14.45¢ |
Reliability (2025)
Average outage time (SAIDI): 419 minutes per customer per year
Average outages (SAIFI): 1.91 per customer
Average restoration time (CAIDI): 220 minutes
As reported for Washington under the Other standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: — GWh
Wholesale power purchased: 734 GWh
Winter peak demand: 184 MW
Energy losses: 5.6% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.9% of 36,818 meters
Customer-sited generation (net metering): 396 installations, 3.4 MW of capacity
Counties served
Grays Harbor, WAKitsap, WAMason, WAPierce, WA
Other large utilities in Washington
- Puget Sound Energy Inc - 1,251,330 customers, residential 17.01¢
- City of Seattle - (WA) - 525,040 customers, residential 14.74¢
- Avista Corp - 424,411 customers, residential 13.37¢
- PUD No 1 of Snohomish County - (WA) - 385,159 customers, residential 12.08¢
- PUD No 1 of Clark County - (WA) - 243,809 customers, residential 10.63¢
- City of Tacoma - (WA) - 200,438 customers, residential 11.45¢
- PUD No 1 of Benton County - 58,679 customers, residential 9.13¢
- PUD No 2 of Grant County - (WA) - 56,753 customers, residential 6.17¢
All Washington utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #15419 in the EIA frame.