Average Utility Costs in Portsmouth, NH

Estimated monthly utility costs (1,000 kWh + 5,000 gal)

Average monthly utility costs in Portsmouth, NH are about $446.71, based on 1,000 kWh of electricity and 5,000 gallons of water, plus sewer and trash fees. See the full breakdown and sources below.

Total estimated monthly utilities

$446.71

Estimated average monthly utilities in Portsmouth are ~$446.71 (1,000 kWh + 5,000 gal assumptions). Average water bill estimate: ~$41.50/mo at 5,000 gallons.

Data freshness: last verified 2026-06-06
  • Electric $284.81 (64%)
  • Water $41.50 (9%)
  • Sewer $120.40 (27%)
  • Trash $0.00 (0%)

Utilities here are about 20% higher than the New Hampshire city average, driven mainly by sewer.

  • In New Hampshire, heating and cooling often makes electric the largest share of the bill.
  • Trash and recycling are funded by the municipality at no direct monthly fee to residents; collection may be provided by a contracted hauler. Check your bill for any fees.

Water

Confirmed
Provider
City of Portsmouth Water & Sewer
Base charge
$4.95/mo
Volumetric rate
$7.31/1,000 gal
Assumed usage
5,000 gal
Monthly total
$41.50
portsmouthnh.gov· verified 2026-06-06

Sewer

Confirmed
Method
tiered
Monthly total
$120.40

Tiered structure simplified to a representative monthly estimate at assumed usage.

portsmouthnh.gov· verified 2026-06-06

Trash

Confirmed
Monthly fee
$0.00

Weekly curbside trash and single-stream recycling for eligible residential properties; tax-funded. Bulky pickup $10 + item fees. Slug portsmouth-nh distinguishes from Portsmouth, Virginia.

portsmouthnh.gov· verified 2026-06-06

Check Internet pricing & availability in Portsmouth

Internet service varies widely—many providers, different plans, introductory offers, and bundles make it hard to compare apples to apples. That's why we don't estimate internet on this page like we do for electric, water, sewer, and trash. Use our tool to compare providers for your address or ZIP code.

Total estimated monthly utilities

$446.71

What changes your bill most?

  • Electric is about 64% of your estimated utilities here.
  • Every 100 kWh changes your total by about $26.50.
  • Each additional 1,000 gallons of water adds about $31.39 to your water and sewer bills combined (water ~$7.31 + wastewater ~$24.08).

Assumptions

  • Electric: 1000 kWh/month
  • Water: 5,000 gallons/month

What these labels mean

  • Confirmed — From this area's rate schedule.
  • Benchmark — From an official typical (e.g. state commission 1,000 kWh); not city-specific.
  • Delivery only — Regulated delivery charges only (e.g. Texas); supply varies by plan.
  • Estimated — From other or incomplete sources; use as a rough guide.
Sources

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Nearby Cities Utility Costs

Other cities in Rockingham County. Click a city for full breakdowns.

CityEst. total/mo
Portsmouth (this)$446.71
Londonderry$314.94
Derry$333.66
Salem$317.66

More in New Hampshire

New Hampshire utility costsRockingham CountyUtility providers in New Hampshire

FAQ

In Portsmouth, sewer is billed in tiers based on usage, so the rate per gallon changes with volume. Our estimate uses the rate structure from City of Portsmouth – Sewer Rate ($18.01/unit Tier 1, effective July 1, 2025) at the assumed 5,000 gallons per month. Your bill will vary with actual usage.
Trash in Portsmouth is provided by the city as part of municipal utilities and is billed at a monthly fee. Rates and services are set by the local government; our estimate uses the fee from City of Portsmouth – Weekly Curbside Trash & Recycling.
We use base charges and per-unit rates from official provider pages. Electric = base + (rate × assumed kWh). Water = base + (rate per 1,000 gal × assumed gallons / 1,000). Sewer is either a flat fee or a percentage of water. Trash is a fixed monthly fee. See the Methodology page for full formulas.
Actual bills depend on your usage, seasonal rates, taxes, fees, and provider-specific rules. Our estimates use fixed assumed usage (e.g., 1,000 kWh, 5,000 gal) for comparison. Your home may use more or less.
Each component shows a 'last verified' date. We aim to update from official sources periodically; always confirm current rates on the provider's site before making decisions.

Learn more

For tips on understanding your bill, comparing cities, and how electric and utility rates work by state, see our blog. Compare Portsmouth with another city side-by-side, or see how we calculate estimates.