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How we calculated this

Extracted by: Gemini 3 Flash · 05/09/2026

Source:

Quality checks: 8/8 passed

✓ Monotonic pricing
✓ Price range plausible
✓ Fixed charge range
✓ No zero tier prices
✓ Tier count (1–8)
✓ Tier boundary scale
✓ Residential customer class
✓ Effective date parseable
— Plausible for MA

Fixed: $7.45/mo
Volume: 6,000 gal = 6.00 kgal
  0–2 kgal  ×  $3.0000/kgal  =  $6.00
  2–6 kgal  ×  $4.9900/kgal  =  $19.96
Total: $7.45 + $25.96 = $33.41/mo

About our methodology ↗

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CHELSEA, MA

MWRA

MWRA serves 2,660,000 people in CHELSEA, MA. The monthly residential water bill at 6,000 gallons is $33.41, 31% below the national average of $48.47.

Updated May 2026

Beta. Data is actively being expanded. Results may vary. if something looks off.

Monthly Rate

$33.41 / 6k gal

-31% vs natl avg

Volumetric Rate

$5.57 / 1k gal

Population Served

2,660,000

Water Burden

—

of median zip income · affordability threshold: 2%

Regional Comparison

Monthly cost (6k gal) vs nearby utilities. Click to navigate.

WORCESTER DPWP, WATER SUPPLY DIVISION

$30.88

WORCESTER DPWP, WATER SUPPLY DIVISION

WORCESTER, MA · $30.88/mo

MWRA

$33.41

MWRA

CHELSEA · $33.41/mo

ABINGTON/ROCKLAND JOINT WTR. WORKS

$63.28

ABINGTON/ROCKLAND JOINT WTR. WORKS

ROCKLAND, MA · $63.28/mo

BOSTON WATER AND SEWER COMMISSION (MWRA)

$71.14

BOSTON WATER AND SEWER COMMISSION (MWRA)

BOSTON, MA · $71.14/mo

Details

Provider Type: State
Primary Source: Surface Water
Data Quality: Model estimate
Rate Source
PWSID: MA6000000

Methodology

Rates are standardized to 6,000 gallons per month for a typical residential consumer with a 5/8" or 3/4" meter. Includes fixed base charges and volumetric charges. Excludes taxes, sewer fees, and other surcharges.

Full methodology ↗