Boston Water Bill Calculator

Estimate BWSC metered water and sewer charges using the number of billing days.

Rate period: January 1 – December 31, 2026. Source checked October 1, 2026. Independent estimate; not an official utility calculator.

Your bill details

Enter your actual stormwater charge. Leaving it at zero excludes stormwater. Billing days scale the volume available in each tier.

Your estimated bill

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Estimated charge breakdown
Water usage—
Sewer usage—
Entered stormwater charge—
Other fees—

Enter your usage to begin.

Rates and calculation method

Daily tier widths are 19, 20, 50, 260, and 950 cubic feet, followed by remaining consumption. Multiply each width by billing days.

Water rates per 1,000 cubic feet: $70.19, $74.96, $81.75, $87.14, $91.71, $95.48. Sewer: $66.68, $77.87, $96.24, $107.69, $117.20, $126.03.

BWSC lists stormwater at $9.06 per ERU. Enter the amount for your property and billing period rather than assuming one ERU. The example uses 2,070 cubic feet over 30 days and an illustrative $9.06 stormwater charge.

Official rate source

BWSC 2026 residential rates

Why might my actual bill differ?

This excludes sewer abatements, discounts, special service fees, and property-specific stormwater adjustments. Bills crossing a rate change need separate calculations. Your provider’s rounding and adjustments may differ.

Can I pay my bill here?

No. This is an independent estimating tool. Use your utility’s official website for payments and account questions.

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