How Much Are Utilities in Marietta, GA on Average?
In Marietta, Georgia, the total average monthly residential utility cost is $380 per month ($4,562 annually) for a typical 3-person single-family residence occupying 1,800 square feet. This comprehensive monthly expenditure comprises $141.30 for electricity (priced at $0.134/kWh via Georgia Power), $55.10 for municipal water through Marietta Water & Sewer Dept, $61.30 for natural gas through Atlanta Gas Light (AGL) / Marketers, $84.00 for municipal sewer, and $31.00 for solid waste sanitation. Due to local climate normals (2,858 Cooling Degree Days), peak summer air conditioning increases monthly power bills by 51% over spring baselines.
Seasonal HVAC Impact: Cooling vs. Heating Degree Days
NOAA data records 2,858 Cooling Degree Days (CDD) annually in Marietta. Upgrading insulation and implementing smart HVAC scheduling can save up to $460 annually in peak summer billing cycles.
Measures intensity and duration of outdoor temperatures requiring air conditioning.
Quantifies heating fuel consumption (natural gas therms or heat pump energy).
Marietta, GA Geographic Utility Coordinates
Official Marietta Utility Rate Schedules (2026)
Published fixed base charges, volumetric consumption blocks, and local service providers.
| Utility Type | Primary Provider | Fixed Monthly Base | Volumetric Rate |
|---|---|---|---|
| Electricity (Power) |
Georgia Power
(888) 660-5890
|
$14.00/mo | $0.134 / kWh |
| City Water |
Marietta Water & Sewer Dept
(404) 546-0311
|
$24.50/mo |
Tier 1: $5.10 Tier 2: $8.20 / 1k gal |
| Natural Gas |
Atlanta Gas Light (AGL) / Marketers (800) 427-5463
|
$16.50/mo | $1.28 / Therm |
| Sewer Service | Marietta Water & Sewer Dept | $28.00/mo | $11.20 / 1k gal |
| Curbside Trash & Recycle | Municipal Solid Waste Dept | $31.00/mo | Included standard cart |
Moving to Marietta: How to Set Up Utilities
Essential transfer lead times, security deposits, and activation guidelines.
Schedule Georgia Power Power Activation
Schedule power hookup at least 7 business days prior to closing or lease start. Call (888) 660-5890 or enroll online.
Waive Security Deposits with a Utility Letter of Credit
Avoid upfront deposits of $150 – $300 by requesting a 12-month zero-late-payment Letter of Good Standing from your prior provider.
Activate Municipal Water & Solid Waste Services
In Marietta, water, wastewater, drainage, and curbside recycling are billed as a unified municipal statement through Marietta Water & Sewer Dept.
Marietta Rooftop Solar Economics & Net Metering (2026)
With residential electricity in Marietta priced at $0.134/kWh (supplied by Georgia Power), solar installations can eliminate up to 85% of grid power charges while hedging against summer rate increases.
Georgia Power RNR (Renewable & Non-Renewable Resources) tariff with monthly netting.
| Financial Component | Estimated Value | Regulatory Source |
|---|---|---|
| Gross Turnkey System Cost (Avg $2.85/W) | $21,090 | NREL Annual Technology Baseline |
| Federal Residential Clean Energy Credit (30% ITC) | -$6,327 | Inflation Reduction Act (IRC § 25D) |
| Net Out-of-Pocket Homeowner Cost | $14,763 | Direct purchase / financed basis |
| First-Year Electric Bill Offset | $1,811 / yr | Marietta electric rate baseline |
| 25-Year Cumulative Net Profit | +$45,920 | Indexed at 2.5% utility escalation |
Frequently Asked Questions in Cobb County
What is the average monthly water bill in Marietta for a family of 3?
For a 3-person household consuming approximately 5,800 to 6,500 gallons per month, the total water and sewer bill in Marietta averages between $75 and $115 per month, including the fixed monthly base meter fee ($24.50) and sewer volume charges.
Why are electric bills in Marietta higher during the summer?
NOAA 1991-2020 climate averages document 2,858 Cooling Degree Days and 2,945 Heating Degree Days annually across Cobb County. In Marietta, peak July air conditioning increases your kWh electric bill by 51% compared to winter baseline.
Is electricity deregulated in Marietta?
Yes, Marietta is in a competitive Texas ERCOT deregulated electricity market. Consumers can shop for competitive fixed rates, 100% renewable solar plans, or time-of-use tariffs.