Somerville Commercial Water and Sewer Rates: FY2026 Quarterly Tier Checks
Somerville FY2026 water and sewer rates include commercial water and sewer tiers, a shift from bi-monthly to quarterly commercial billing, and combined marginal rates above $30 per CCF for high-use accounts.
Quick Answer
Somerville approved FY2026 commercial water and sewer rates on June 12, 2025. Commercial accounts move from bi-monthly to quarterly billing, with combined water and sewer rates ranging from $21.30 per CCF in Tier 1 to $30.83 per CCF above 200 CCF quarterly.
$21.30
Tier 1 Combined
Per CCF, quarterly 0-19
$30.83
Tier 4 Combined
Per CCF, quarterly 200+
$19.42
Tier 4 Sewer
Per CCF
Quarterly
Billing Cycle
Commercial FY2026
What changed in Somerville
Source-reported facts: Somerville says its FY2026 water and sewer utility rates were approved June 12, 2025 after a formal presentation and public hearing. The changes include an 18 percent increase in revenue from water volumetric usage charges and a 12 percent increase in revenue from sewer volumetric usage charges.
The city also says commercial bi-monthly bills move to a quarterly billing cycle. That changes how usage falls into tiers, so property teams should not compare one old bill to one new bill without normalizing the billing period.
Who may be affected
Commercial, multifamily, restaurant, hotel, office, healthcare, campus, laundry, and retail properties in Somerville should review the new quarterly tier table.
High-use accounts are especially exposed because the FY2026 commercial combined rate reaches $30.83 per CCF above 200 CCF per quarter, with sewer representing $19.42 of that combined marginal rate.
Why sewer carries most of the marginal cost
For FY2026 commercial accounts, Somerville lists Tier 1 at $7.28 water plus $14.02 sewer, Tier 2 at $10.48 water plus $17.89 sewer, Tier 3 at $10.97 water plus $18.76 sewer, and Tier 4 at $11.41 water plus $19.42 sewer.
That means sewer is the larger variable line in every commercial tier. A usage-reduction estimate should model water and sewer together, then separate any fixed or non-usage charges from the variable CCF charges.
What a 20 percent usage reduction could mean
Directional estimate: assume a Somerville commercial account uses 250 CCF in a quarter, so the highest marginal usage sits above the 200 CCF quarterly Tier 4 threshold. A 20 percent usage reduction equals 50 CCF.
At the Tier 4 combined rate of $30.83 per CCF, those 50 CCF represent about $1,541.50 in quarterly variable water and sewer exposure. Actual savings depend on the full tier stack, fixed charges, billing timing, site conditions, and installation feasibility.
What to check first on your bill
Confirm quarterly usage in CCF, the highest tier reached, water and sewer line items, billing-period length, meter size, account class, and any non-usage charges.
For year-over-year comparison, normalize old bi-monthly bills and new quarterly bills to CCF per month or CCF per day before deciding whether the change is rate-driven, usage-driven, or both.
Where Smart Valve fits
Smart Valve may be relevant when a Somerville commercial property has controllable metered water volume and sewer charges track water usage. It cannot reduce fixed charges or non-usage fees.
The best first step is a 12-month bill review that converts each billing period to comparable CCF, then estimates variable water and sewer exposure by tier.
What to Do Next
Convert bi-monthly and quarterly bills to a common usage period before comparing.
Model the highest commercial tier reached before estimating savings.
Separate sewer variable exposure from any fixed or non-usage charges.
FAQ
What is Somerville's highest FY2026 commercial combined water and sewer rate?
Somerville lists the highest FY2026 commercial combined rate at $30.83 per CCF for quarterly usage over 200 CCF.
Did Somerville change commercial billing frequency?
Yes. Somerville says commercial bi-monthly bills move to a quarterly billing cycle as part of the FY2026 changes.
Would a 20 percent usage reduction lower every Somerville utility line?
No. Usage reduction should be modeled against water and sewer volume charges. Fixed charges and non-usage fees may not decline with usage.
Sources
Related Commercial Water Resources
Model This Market Against Your Actual Bill
Use your local rate, current monthly bill, and billed usage to estimate how much controllable volume reduction could offset this market pressure.
