ZIP code 04420 in Castine, ME has a residential electricity rate of 23.43¢/kWh as of 2024, which is 40.5% higher than the national average of 16.68¢/kWh and 14.5% below the ME state average of 27.42¢/kWh.
This higher rate reflects ME's energy infrastructure costs, renewable energy investments, and regional market conditions. Despite higher rates, many residents offset costs through energy efficiency programs and solar installations.
Monthly Bill Estimates
ZIP Code 04420 Rate Comparison Map
Castine, ME • Compare rates with nearby areas
Rates range from 23.43¢ to 23.43¢ in this area
Click any ZIP code to view details • Darker colors indicate higher rates • Map data © OpenStreetMap
📊 Comprehensive Rate Analysis for 04420
The electricity market in Castine presents unique characteristics that influence your rates.ZIP code 04420 enjoys lower rates than the ME average, potentially benefiting from proximity to generation sources, efficient local infrastructure, or favorable utility contracts.
Key Market Insights
- Regional Context: ME ranks among states nationally for residential electricity rates. Your specific ZIP code is performing better than the state average.
- Surprising Comparison: Residents in 04420 pay 40% more than the national average, which means an extra $730 per year for a typical household.
- Market Structure: As a deregulated market, ME allows you to choose from multiple electricity suppliers, creating competitive pricing opportunities. Shopping for rates could save 10-20% on your electricity costs.
Rate Trend Analysis
Historical data shows that ME electricity rates have fluctuated over the past decade. The current rate of 23.43¢/kWh represents better value compared to the state's trajectory. Looking forward, rates are influenced by factors including renewable energy transitions, infrastructure investments, and natural gas prices.
📊 Rate Comparison
Quick Summary:
The current ZIP code rate is 23.43¢/kWh, compared to the national average of 16.68¢/kWh.
⚡ Your Electric Company
ME Residential Electricity Rates 1970-2024
Caption: ME residential electricity rates from 1970-2024 (¢/kWh)
Source: EIA State Energy Data System (SEDS) • Rates shown in cents per kilowatt-hour
What Uses Electricity in Your Home?
Understanding where your electricity goes in Castine
ME heating costs drive higher winter electricity bills
Electric heating can account for 40-50% of winter bills. Heat pumps and proper insulation can significantly reduce heating costs.
Air Conditioning & Heating
Heating is the primary expense
Water Heating
Hot water for showers, dishes, and laundry
Appliances
Refrigerator, washer, dryer, dishwasher
Lighting
Indoor and outdoor lighting
Electronics
TVs, computers, gaming consoles
Other
Miscellaneous devices
Estimated Monthly Total
Based on 900 kWh at 23.43¢/kWh
* Usage percentages are estimates based on EIA Residential Energy Consumption Survey (RECS) data for the South Census Region. Actual usage varies by household.
Quick Ways to Reduce Usage
💰 Save Money Tips
🗺️ Nearby Areas
Frequently Asked Questions
What is the average electricity rate in ZIP code 04420?
The average residential electricity rate in ZIP code 04420 is 23.43¢ per kilowatt-hour (kWh) as of 2025. This rate is 40.5% higher than the national average of 16.68¢/kWh and is provided primarily by Central Maine Power Co.
Who is the electric company for 04420?
Central Maine Power Co is the primary electricity provider for ZIP code 04420. This investor-owned utility serves the area with a residential rate of 23.43¢/kWh.
What is the average monthly electric bill in 04420?
The average monthly electric bill in ZIP code 04420 is approximately $210.91, based on the average residential rate of 23.43¢/kWh and typical household usage of 900 kWh per month. Bills can range from $117.17 for smaller homes (500 kWh) to $351.52 for larger homes (1,500 kWh). Actual bills will vary based on usage, season, and additional fees.
Is 04420 in a deregulated electricity area?
Yes, ZIP code 04420 is located in ME, which has a deregulated electricity market. This means residents and businesses can choose their electricity supplier from multiple retail energy providers, potentially finding better rates or renewable energy options. The utility company still delivers the electricity and maintains the power lines, but you can shop for the best energy supply rate.
How does 04420 compare to other ZIP codes in ME?
ZIP code 04420 has an electricity rate of 23.43¢/kWh, while the ME state average is 27.42¢/kWh — making the state average 14.5% more expensive than this ZIP. This ZIP code enjoys lower rates than the state average, potentially due to proximity to power generation, efficient local infrastructure, or competitive utility pricing. Compare with nearby ZIP codes to find potential savings in your area.
When will 2025 electricity rates be available?
2025 electricity rates for ZIP code 04420 will be available in December 2026 when the U.S. Energy Information Administration (EIA) publishes its annual Form 861 report. The EIA collects data from all U.S. electric utilities and releases the complete dataset approximately 12 months after the reporting year. ElectricityExplorer updates all rates within 48 hours of each new EIA release. The current data shown reflects 2024 rates, which is the most recent complete annual data available.
📊Data Sources & Update Schedule
Current Data Version: 2024 Annual Data (Released December 2025)
| Data Source | Coverage Period | Next Update Expected |
|---|---|---|
| EIA Form 861 | 2024 rates | December 2026 (2025 data) |
| NREL Utility Rates | 2024 rates | Q1 2026 |
| SEDS Historical | 1970-2024 | December 2026 |
How We Calculate Rates
Residential electricity rates are calculated from EIA Form 861 data using the formula:
Total Revenue ÷ Total Sales (MWh) = Average Rate per kWhWhy 2024 Data in 2026?
The EIA publishes annual electricity data approximately 12 months after the reporting year ends. The most current complete dataset available is 2024, released in December 2025. We update our database within 48 hours of each new EIA release.
Looking for 2025, 2026, or 2027 rates?
2025 electricity rates for ZIP code 04420: Will be available in December 2026 when the EIA releases the 2025 annual report.
2026 electricity rates for ZIP code 04420: Expected in December 2027 following the standard 12-month reporting cycle.
2027 electricity rates for ZIP code 04420: Projected release in December 2028 based on historical EIA publication patterns.
📊 Historical Data Available:
We currently have complete residential electricity rate data from 1970 through 2024 for all US ZIP codes, cities, and states.
Data accuracy verified through multiple sources • Updated within 48 hours of new releases