![\"\"](\"https:\/\/www.gcdev3.com\/mwra\/wp-content\/uploads\/2025\/09\/csomap23.jpg\")
<\/p>\n![September 17, 2025 \u2013 Progress on Development of Updated Combined Sewer Overflow Control Plan<\/a>An update on the joint MWRA, Cambridge, and Somerville effort to develop an updated CSO Control Plan, detailing progress on evaluating control alternatives, cost and water-quality analyses, public engagement, and next steps toward submission to MassDEP and EPA<\/li>\nOctober 22, 2025 \u2013 Public Engagement and Involvement for Development of the Draft Updated CSO Control Plan<\/a>A summary of the extensive public outreach and stakeholder involvement undertaken by MWRA, Cambridge, and Somerville during the CSO planning process, including multilingual public meetings, surveys, engagement with watershed groups, and environmental justice community participation<\/li>\nCombined Sewer Overflow Control Planning Program – Joint efforts by Cambridge, MWRA, and Somerville<\/a>\u00a0A joint project website from Cambridge, Somerville, and MWRA providing information, updates, and public engagement opportunities on plans to reduce combined sewer overflows and improve water quality in local rivers.<\/li>\nProgress on Development of Updated Combined Sewer Overflow Control Plan – September 17, 2025 MWRA BOD Staff Summary<\/a>\u00a0MWRA staff brief the Board on progress toward the updated CSO Control Plan\u2014covering regulatory requirements, evaluated alternatives, preliminary costs, public engagement, and next steps toward a draft submittal and recommendations.<\/li>\nAdvisory Board Blog: What Are We Paying for Clean Water?<\/em><\/a>\n\n\n\n\n\n\n\nAdvisory Board blog post analyzing the updated CSO Control Plan\u2014reviewing past gains, highlighting cost-per-gallon tradeoffs, and urging strategic, equitable, flexible investments to maximize water-quality benefits.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\nJust the FAQs video (CSOs in the MWRA System)<\/a>\nA \u201cJust the FAQs\u201d video from the MWRA Advisory Board explaining the history, progress, and ongoing management of Combined Sewer Overflows (CSOs) in the MWRA system.<\/p>\n<\/li>\nMassDEP: Sanitary Sewer Systems & Combined Sewer Overflows<\/a>\n\n\n\n\n\n\n\nThis state-government page explains how Massachusetts regulates sanitary sewer and combined sewer overflow systems \u2014 covering infrastructure, overflow causes, public notification rules, and CSO control requirements under state and federal law.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\nMWRA: Combined Sewer Overflows<\/a>\n\n\n\n\n\n\n\nA public-education page by MWRA explaining what Combined Sewer Overflows (CSOs) are, how their system handles them, historical and ongoing control efforts, health and environmental impacts, and MWRA\u2019s monitoring and planning framework.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\nCity of Cambridge: Combined Sewer Overflows<\/a>\nA City of Cambridge page explaining how combined sewer overflows (CSOs) work, their impacts on the Charles River and Alewife Brook, and the city\u2019s ongoing projects, regulations, and data reporting to reduce CSOs and improve water quality.<\/p>\n<\/li>\nCity of Somerville: Combined and Sanitary Sewer Overflow Control<\/a>\nA City of Somerville page providing real-time CSO\/SSO activation notifications, annual reports, public health guidance, and details on ongoing efforts with MWRA and Cambridge to reduce sewer overflows and improve water quality.<\/p>\nAdvisory Board Materials<\/h3>\n\nThe Advisory Board\u2019s FY26 Comments & Recommendations on the CSO Long-Term Control Plan<\/a>, urging MWRA to pursue only cost-effective projects with measurable water quality and equity benefits while broadening focus to rising risks like SSOs, stormwater, and infiltration\/inflow.<\/li>\nThe Advisory Board\u2019s FY24 Comments & Recommendations on the CSO Long-Term Control Plan<\/a>, reviewing MWRA\u2019s 2022 performance, legislative proposals, and advocacy group pressures, while opposing full CSO elimination as financially unsustainable despite environmental benefits\n\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"Updated Long-Term Control Plan: Resources Hub Over the next few months, MWRA, Cambridge, and Somerville will be finalizing the Updated CSO Long-Term Control Plan for submission. What will be filed […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-16153","page","type-page","status-publish","hentry","has-not-thumbnail"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/comments?post=16153"}],"version-history":[{"count":16,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions"}],"predecessor-version":[{"id":16216,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions\/16216"}],"wp:attachment":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/media?parent=16153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}](\"https:\/\/www.gcdev3.com\/mwra\/wp-content\/uploads\/2025\/10\/Pages-from-2025-09-17-MWRA-Board-of-Directors-Meeting-Materials-pdf-image.jpg\"){kind=link}
![October 22, 2025 \u2013 Public Engagement and Involvement for Development of the Draft Updated CSO Control Plan<\/a>A summary of the extensive public outreach and stakeholder involvement undertaken by MWRA, Cambridge, and Somerville during the CSO planning process, including multilingual public meetings, surveys, engagement with watershed groups, and environmental justice community participation<\/li>\nCombined Sewer Overflow Control Planning Program – Joint efforts by Cambridge, MWRA, and Somerville<\/a>\u00a0A joint project website from Cambridge, Somerville, and MWRA providing information, updates, and public engagement opportunities on plans to reduce combined sewer overflows and improve water quality in local rivers.<\/li>\nProgress on Development of Updated Combined Sewer Overflow Control Plan – September 17, 2025 MWRA BOD Staff Summary<\/a>\u00a0MWRA staff brief the Board on progress toward the updated CSO Control Plan\u2014covering regulatory requirements, evaluated alternatives, preliminary costs, public engagement, and next steps toward a draft submittal and recommendations.<\/li>\nAdvisory Board Blog: What Are We Paying for Clean Water?<\/em><\/a>\n\n\n\n\n\n\n\nAdvisory Board blog post analyzing the updated CSO Control Plan\u2014reviewing past gains, highlighting cost-per-gallon tradeoffs, and urging strategic, equitable, flexible investments to maximize water-quality benefits.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\nJust the FAQs video (CSOs in the MWRA System)<\/a>\nA \u201cJust the FAQs\u201d video from the MWRA Advisory Board explaining the history, progress, and ongoing management of Combined Sewer Overflows (CSOs) in the MWRA system.<\/p>\n<\/li>\nMassDEP: Sanitary Sewer Systems & Combined Sewer Overflows<\/a>\n\n\n\n\n\n\n\nThis state-government page explains how Massachusetts regulates sanitary sewer and combined sewer overflow systems \u2014 covering infrastructure, overflow causes, public notification rules, and CSO control requirements under state and federal law.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\nMWRA: Combined Sewer Overflows<\/a>\n\n\n\n\n\n\n\nA public-education page by MWRA explaining what Combined Sewer Overflows (CSOs) are, how their system handles them, historical and ongoing control efforts, health and environmental impacts, and MWRA\u2019s monitoring and planning framework.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\nCity of Cambridge: Combined Sewer Overflows<\/a>\nA City of Cambridge page explaining how combined sewer overflows (CSOs) work, their impacts on the Charles River and Alewife Brook, and the city\u2019s ongoing projects, regulations, and data reporting to reduce CSOs and improve water quality.<\/p>\n<\/li>\nCity of Somerville: Combined and Sanitary Sewer Overflow Control<\/a>\nA City of Somerville page providing real-time CSO\/SSO activation notifications, annual reports, public health guidance, and details on ongoing efforts with MWRA and Cambridge to reduce sewer overflows and improve water quality.<\/p>\nAdvisory Board Materials<\/h3>\n\nThe Advisory Board\u2019s FY26 Comments & Recommendations on the CSO Long-Term Control Plan<\/a>, urging MWRA to pursue only cost-effective projects with measurable water quality and equity benefits while broadening focus to rising risks like SSOs, stormwater, and infiltration\/inflow.<\/li>\nThe Advisory Board\u2019s FY24 Comments & Recommendations on the CSO Long-Term Control Plan<\/a>, reviewing MWRA\u2019s 2022 performance, legislative proposals, and advocacy group pressures, while opposing full CSO elimination as financially unsustainable despite environmental benefits\n\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"Updated Long-Term Control Plan: Resources Hub Over the next few months, MWRA, Cambridge, and Somerville will be finalizing the Updated CSO Long-Term Control Plan for submission. What will be filed […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-16153","page","type-page","status-publish","hentry","has-not-thumbnail"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/comments?post=16153"}],"version-history":[{"count":16,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions"}],"predecessor-version":[{"id":16216,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions\/16216"}],"wp:attachment":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/media?parent=16153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}](\"https:\/\/www.gcdev3.com\/mwra\/wp-content\/uploads\/2025\/10\/Pages-from-2025-10-22-MWRA-Board-of-Directors-Meeting-Materials-pdf-image.jpg\"){kind=link}
Advisory Board blog post analyzing the updated CSO Control Plan\u2014reviewing past gains, highlighting cost-per-gallon tradeoffs, and urging strategic, equitable, flexible investments to maximize water-quality benefits.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\n
A \u201cJust the FAQs\u201d video from the MWRA Advisory Board explaining the history, progress, and ongoing management of Combined Sewer Overflows (CSOs) in the MWRA system.<\/p>\n<\/li>\n
\n
This state-government page explains how Massachusetts regulates sanitary sewer and combined sewer overflow systems \u2014 covering infrastructure, overflow causes, public notification rules, and CSO control requirements under state and federal law.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\n
\n
A public-education page by MWRA explaining what Combined Sewer Overflows (CSOs) are, how their system handles them, historical and ongoing control efforts, health and environmental impacts, and MWRA\u2019s monitoring and planning framework.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/li>\n
A City of Cambridge page explaining how combined sewer overflows (CSOs) work, their impacts on the Charles River and Alewife Brook, and the city\u2019s ongoing projects, regulations, and data reporting to reduce CSOs and improve water quality.<\/p>\n<\/li>\n
A City of Somerville page providing real-time CSO\/SSO activation notifications, annual reports, public health guidance, and details on ongoing efforts with MWRA and Cambridge to reduce sewer overflows and improve water quality.<\/p>\n
Advisory Board Materials<\/h3>\n\n- The Advisory Board\u2019s FY26 Comments & Recommendations on the CSO Long-Term Control Plan<\/a>, urging MWRA to pursue only cost-effective projects with measurable water quality and equity benefits while broadening focus to rising risks like SSOs, stormwater, and infiltration\/inflow.<\/li>\n
- The Advisory Board\u2019s FY24 Comments & Recommendations on the CSO Long-Term Control Plan<\/a>, reviewing MWRA\u2019s 2022 performance, legislative proposals, and advocacy group pressures, while opposing full CSO elimination as financially unsustainable despite environmental benefits\n
\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
Updated Long-Term Control Plan: Resources Hub Over the next few months, MWRA, Cambridge, and Somerville will be finalizing the Updated CSO Long-Term Control Plan for submission. What will be filed […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-16153","page","type-page","status-publish","hentry","has-not-thumbnail"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/comments?post=16153"}],"version-history":[{"count":16,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions"}],"predecessor-version":[{"id":16216,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions\/16216"}],"wp:attachment":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/media?parent=16153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
Updated Long-Term Control Plan: Resources Hub Over the next few months, MWRA, Cambridge, and Somerville will be finalizing the Updated CSO Long-Term Control Plan for submission. What will be filed […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-16153","page","type-page","status-publish","hentry","has-not-thumbnail"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/comments?post=16153"}],"version-history":[{"count":16,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions"}],"predecessor-version":[{"id":16216,"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/pages\/16153\/revisions\/16216"}],"wp:attachment":[{"href":"https:\/\/www.gcdev3.com\/mwra\/wp-json\/wp\/v2\/media?parent=16153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}