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Boston, MA, USA · Wastewater Infrastructure

Boston Wastewater Infrastructure Projects, Capital Plans and Delivery

Boston's wastewater market combines a current Boston Water and Sewer Commission capital program with multi-year sewer-separation and regional CSO work. BWSC's 2026-2028 Capital Improvement Program totals about $389.6 million, including $143.3 million for sewer projects. Its program includes cleaning and televising 90 miles of sewer and drains, while East Boston Sewer Separation Phase IV is being delivered through five construction contracts from 2025 through 2031. MWRA's draft updated CSO control plan adds a separate regional program with an estimated $1.3 billion investment.

Boston MA Wastewater Projects
$389.6M
BWSC 2026-2028 Capital Improvement Program
$143.3M
BWSC 2026-2028 sewer capital program
90 miles
Sewer and drains identified for cleaning and televising in BWSC's 2026 program
5 contracts
East Boston Sewer Separation Phase IV construction packages
Market outlook

Boston Wastewater Capital Programs and Project Delivery

BWSC's 2026-2028 Capital Improvement Program totals about $389.6 million, with $143.3 million assigned to sewer projects and $69.8 million to stormwater. The program includes New Boston Main Interceptor rehabilitation, East and South Boston sewer separation, pump-station upgrades, citywide sewer and drain renewal, and consent-decree work that includes cleaning and televising 90 miles of sewer and drains. East Boston Sewer Separation Phase IV is already in construction and is scheduled across five contracts, with the first contract starting in September 2025 and final completion planned for fall 2031. MWRA's draft updated CSO control plan remains a separate regional program in public review, with an estimated $1.3 billion investment.
$389.6M
BWSC 2026-2028 Capital Improvement Program
$143.3M
BWSC 2026-2028 sewer capital program
90 miles
Sewer and drains identified for cleaning and televising in BWSC's 2026 program
5 contracts
East Boston Sewer Separation Phase IV construction packages
BWSC's 2026-2028 Sewer Capital Program
BWSC's three-year capital program totals about $389.6 million, including $143.3 million for sewer work. Named scopes include New Boston Main Interceptor rehabilitation, East and South Boston sewer separation, Dorchester Interceptor design, pump-station upgrades, citywide sewer and drain renewal, and projects associated with the consent decree.
East Boston Sewer Separation Is in Multi-Contract Construction
East Boston Sewer Separation Phase IV is being delivered through five separate construction contracts in different neighborhoods. BWSC states that the first contract began in September 2025 and the final contract is scheduled for completion in fall 2031. The project is therefore a multi-year active delivery program with separate construction packages.
CSO and Condition-Assessment Work Remains Active
BWSC's current program includes cleaning and televising 90 miles of sewer and drains as part of consent-decree and condition-assessment work. Separately, MWRA's draft updated CSO control plan remains in public review in 2026 and carries an estimated $1.3 billion investment across the participating sewer-service communities.
Infrastructure lifecycle

How Boston Wastewater Projects Move from Capital Planning to Delivery

Boston wastewater projects move through owner capital programs, engineering, regulatory review, procurement and construction. The lifecycle below provides context for the BWSC and MWRA stages described on this page.
Boston MA Wastewater Projects | Public Infrastructure Project Development Timeline
Citylitics impact: Intelligence Feeds surfaces early owner, agency, utility, planning, funding, and procurement-preparation signals. Capital Projects Dashboard connects those signals to future spend. Grant Funding Dashboards and Procurement Feeds add theme-specific context so teams can prioritize, prepare, and act before procurement compresses the timeline.
Procurement preparation

Boston Wastewater Owners and Delivery Paths

Boston's local sewer and drainage systems are managed by BWSC, while MWRA operates the regional wastewater system serving Boston and surrounding communities. Their capital programs, regulatory obligations and project schedules create separate but connected delivery pipelines.
Boston Water and Sewer Commission
BWSC owns and manages Boston's local water, sewer and storm-drain systems. Its 2026-2028 program includes sewer renewal, separation, interceptor rehabilitation, pump-station work, condition assessment and stormwater projects.
Massachusetts Water Resources Authority
MWRA operates the regional wastewater treatment, interception and pumping system serving Boston and surrounding communities. Its regional responsibilities include treatment, interceptor, pumping and CSO programs.
Regulatory and CSO Programs
Consent-decree obligations and the updated CSO planning process add defined regulatory programs to Boston-area wastewater work. These programs run alongside BWSC's local capital projects and can create separate engineering, rehabilitation and construction scopes.
Early signal read

Boston Wastewater Infrastructure Project Intelligence

The live cards below are Citylitics project intelligence matched to Boston's Wastewater Infrastructure market. Each preview represents specific owner or project activity; the Intelligence Brief adds source, stage, timing and account context.
Wastewater - Collection System-Wide Initiatives
City of Boston, MA - Collection System-Wide Initiatives
The City of Boston is planning and designing a centralized collections system initiative, backed by a $650,000 budget spanning fiscal years 2028 through 2031.
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Wastewater - Pipe Initiatives
Boston Water and Sewer Commission, MA - Pipe Initiatives
The Boston Water and Sewer Commission is planning a $1,600,000 wastewater initiative spanning 2026 through 2028 to rehabilitate and replace local sewer pipes.
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Wastewater - Pipe Initiatives
Boston Water and Sewer Commission, MA - Pipe Initiatives
The Boston Water and Sewer Commission is planning a $6,800,000 wastewater and water infrastructure upgrade project from 2026 through 2028 to replace water mains, sewers, and storm drains.
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Wastewater - Pipe Initiatives
Boston Water and Sewer Commission, MA - Pipe Initiatives
The Boston Water and Sewer Commission is planning a wastewater pipe initiative to restore roadways following excavations, with $147,581 budgeted from 2026 to 2028.
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Similar Regions

Related Markets

Related Massachusetts wastewater markets are shown below where corresponding Citylitics pages are available.
Worcester
Springfield
Cambridge
Lowell
Brockton
Quincy
Lynn
New Bedford
Fall River
Newton
Suffolk County
Massachusetts
Citylitics platform

Track Boston Wastewater Projects Across BWSC and MWRA

Citylitics connects local and regional capital programs, project delivery, regulatory movement and procurement updates across Boston wastewater. Teams can maintain account coverage as BWSC and MWRA projects change stage, prioritize the scopes relevant to their market and act when a project reaches the right point for outreach or active pursuit.
Core platform
Intelligence Feeds
Track owner, capital-program and project activity across Boston wastewater accounts as conditions change.
Add-on
Capital Projects Dashboard
Use MWRA and BWSC capital-program context to prioritize owners, asset systems and project categories.
Add-on
Priority Feeds
Surface wastewater projects that match target accounts, territories and qualification rules.
Add-on
Procurement Feeds
Follow later-stage buying activity as defined wastewater scopes move into formal procurement.
Commercial signals

Commercial Signals and Market Development

Boston's wastewater market combines BWSC's city-level sewer and drainage portfolio with a separate regional MWRA program. Market-development teams can keep those owner pipelines distinct, then align account coverage with rehabilitation, separation, pumping, treatment and CSO scopes as they move through engineering, construction and procurement.
City program
BWSC's Capital Program Funds Sewer and Drainage Improvements
BWSC's 2026-2028 CIP includes $143.3 million in sewer work and named rehabilitation, separation, pumping and condition-assessment projects.

The current project list supports account coverage by asset type, neighborhood and delivery stage.
Active delivery
East Boston Sewer Separation Phase IV Is in Multi-Contract Delivery
BWSC's East Boston Sewer Separation Phase IV is being delivered through five construction contracts, with the first beginning in September 2025 and the final contract scheduled for completion in fall 2031.
Regional program
MWRA's Updated CSO Program Has a Separate Regional Delivery Path
MWRA's draft updated CSO control plan carries an estimated $1.3 billion investment and remained in public review in September 2026.

The regional program should be covered separately from BWSC's city capital projects because ownership, scope development and procurement follow different paths.

PROJECT INTELLIGENCE FAQ

Frequently Asked Questions

Boston Water and Sewer Commission’s 2026-2028 Capital Improvement Program totals approximately $389.6 million. About $143.3 million is assigned to sewer work and $69.8 million to stormwater.

BWSC is delivering Phase IV through five separate construction contracts. The first contract started in September 2025, and final completion is scheduled for fall 2031.

MWRA’s draft updated CSO control plan remained in public review in September 2026. MWRA materials describe an estimated $1.3 billion investment across the participating sewer-service communities.

Sources and Methodology

Sources & Intelligence Methodology

Market and geographic context on this page is informed by official plans, budgets, capital programs, board materials, public records, and other government or public-owner sources. The early-stage project signals and pre-RFP opportunity previews are provided separately through Citylitics’ proprietary sales intelligence platform, which continuously identifies and tracks infrastructure opportunities as they develop toward procurement.

2026-2028 Capital Improvement Program

Boston Water and Sewer Commission | 2026
Details BWSC’s $389.6 million 2026-2028 capital program, including $143.3 million for sewer work, named sewer-separation and rehabilitation projects, and cleaning and televising 90 miles of sewer and drains.

East Boston Sewer Separation Project

Boston Water and Sewer Commission | Current
Describes East Boston Sewer Separation Phase IV, including five separate construction contracts, a September 2025 start for the first contract and final completion planned for fall 2031.

Draft Updated Combined Sewer Overflow Control Plan Public Hearing #2

Massachusetts Water Resources Authority | 2026-09-24
Describes the draft updated CSO control plan, its estimated $1.3 billion investment and the September 2026 public-comment process.

Prepared by Citylitics Market Intelligence Team

TL;DR

BWSC's 2026-2028 Capital Improvement Program totals about $389.6 million, including $143.3 million for sewer work.

BWSC's current program includes cleaning and televising 90 miles of sewer and drains, while East Boston Sewer Separation Phase IV is being delivered through five construction contracts.

MWRA's draft updated CSO control plan is a separate regional program with an estimated $1.3 billion investment and remained in public review in September 2026.

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