Public Water Authority
Massachusetts Water Resources Authority (MWRA)
Serving Greater Boston and 61 member communities
Population served
2,580,000 people (EPA SDWIS PWS ID MA6000000; 2026 active CWS record). MWRA is a wholesale system serving member communities rather than a retail residential billing provider.
State system code
FIPS 25
Billing frequency
A dedicated this detail was not publicly posted. For residential retail accounts. Wholesale assessments are calculated for member communities under MWRA's fiscal-year assessment process.
Provider briefing
How this utility’s billing works
Massachusetts Water Resources Authority (MWRA) operates as a public water authority serving Greater Boston and 61 member communities. Customers should use the provider’s current account-specific bill and official customer-service instructions as the final authority for deadlines, balances, and service requests.
The published water-rate framework is described as Wholesale metered assessment. MWRA's published methodology calculates water charges using a flat rate per million gallons multiplied by member-community metered use; its member communities then set retail rates and bill customers.. Bills are generated a dedicated this detail was not publicly posted. for residential retail accounts. wholesale assessments are calculated for member communities under mwra's fiscal-year assessment process., and a typical residential cost reference is A dedicated this detail was not publicly posted. . MWRA does not issue the residential bill, and its published wholesale assessment is not a valid standalone household cost estimate; the local community's water, sewer, stormwater, and service charges must be added.. These descriptions are useful planning benchmarks; actual charges can change with meter size, usage, sewer averaging, local taxes, drought stages, or account-specific fees.
Wastewater and sewer calculation
Wholesale sewer assessments are allocated among member communities using total flow, contributing population, census population, prior three-year average flow, peak-month wastewater flow, and wastewater strength measures including suspended solids and biochemical oxygen demand. Residential sewer billing is performed by the local member community.
Meter and infrastructure notes
MWRA uses member-community metered water use for wholesale assessment. The reviewed regional pages do not specify each member community's residential meter technology or reading calendar.
Emergency water support
Report a leak or water emergency
A dedicated this detail was not publicly posted. For residential customers; report a household or local distribution emergency to the member community. MWRA is a regional wholesale supplier and is not the retail emergency dispatcher.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Greater Boston and 61 member communities
Massachusetts Water Resources Authority (MWRA) is listed here as a public water authority. The profile separates account actions—such as paying a bill or requesting service—from explanatory material about rates, meters, wastewater, leaks, and delinquency.
Because utility rules can vary by account class, meter size, service address, billing date, and local ordinance, treat the published bill and current provider website as the final authority. Use this profile to locate the correct channel and prepare better questions for customer service.
If your issue is urgent, start with the provider’s emergency number or official payment route rather than waiting for an email response. Keep a written record of calls, confirmation numbers, notice dates, and documents you submit.