Regulations open for comment
Proposed Amendments to 314 CMR 4.00 Massachusetts Surface Water Quality Standards
Public Hearings: Tuesday, January 27, 2026, at 6:00 PM and Wednesday, January 28, 2026, at 2:00 PM via Zoom. Registration required.
Public comment period closes February 9, 2026
Public Notice: English | Español | Português | Português, Brasil | 中文 | 中文(繁體) |Kreyòl Ayisyen | Tiếng Việt
Proposed SWQS Amendments - Redline
Proposed SWQS Amendments - Clean
Summary of Amendments
For more information on proposed amendments to 314 CMR 4.00, including registration information for the public hearings, see the Watershed Planning Program: Surface Water Quality Standards Review and Development Activities | Mass.gov page.
Proposed Amendment to 310 CMR 7.02(14) to Extend Cumulative Impact Analysis Program Review Deadline
Public Hearing: March 3, 2026 at 10:00 AM and 6:00 PM via Zoom. Registration required. (See notice)
Public Comment Period: Ends March 13, 2026
Notice: English | Español | Português | Kreyòl Ayisyen | 中文 | 中文(繁體) | ភាសាខ្មែរ | Tiếng Việt | Kriolu
Background Document
Amendment
Policies & guidance open for comment
Comment is closed at this time.
Programs, plans & reports open for comment
Reducing Methane Emissions from Natural Gas Distribution Mains and Services
Public Comment Period: Ends January 9, 2026 at 5:00 p.m.
Public Notice: English | Kriolu | Kreyòl Ayisyen | Português | 中文 | 中文(繁體) | Español | Tiếng Việt
Massachusetts DRAFT 2024/2026 Integrated List of Waters
Public Comment Period: Ends February 10, 2026 at 5:00 p.m.
Public Notice: English | Other Languages
Permits and approvals
Postings closed for comment
For reference: The following archive is a subset of public comment postings over the past year.
Proposed Amendment to 310 CMR 7.00 Appendix C Operating Permit and Compliance Program
Public Hearing: September 30, 2025 at 10:00 AM and 6:00 PM via Zoom. Registration required. (See notice)
Public comment period closed October 10, 2025
Notice: English | Español | Tiếng Việt | 中文 | Kreyòl Ayisyen | Português
Background Document
Amendment
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Draft 2025 Air Monitoring Network Plan Public Notice
Public comment period closed July 7, 2025
Notice: English | Kreyòl Ayisyen | ភាសាខ្មែរ | Português | Español | 中文 | 中文(繁體)
Draft 2025 Air Monitoring Network Plan
2025 Attachments 2&3: Site Measurements and Measurement Methods
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Commonwealth's Draft 2023 Greenhouse Gas (GHG) Emission Factors for Retail Sellers of Electricity
Public comment period closed July 3, 2025
Notice: English | Português | 中文 | 中文(繁體) | Kreyòl Ayisyen | Tiếng Việt | Kriolu
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Public Comment Notice - BESS - EV Charger Guidance
Public comment period closed June 11, 2025
Notice: English
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Proposed Amendments to 310 CMR 7.00 and 310 CMR 6.00 Primary PM2.5 and Secondary SO2 NAAQS
Public Hearing: April 29, 2025 at 10:00 AM and 6:00 PM via Zoom. Registration required. (See notice)
Public comment period closed May 9, 2025
Notice: English | Español | Português | Kreyòl Ayisyen | 中文 | 中文(繁體) | ប្រទេសកម្ព ុជ | Tiếng Việt | Kriolu | اَلْعَرَبِيَّةُ | русский | Français
Background Document
Amendments
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MassDEP Listening Session: South Coast Renewables, LLC
Proposed Solid Waste Handling and Transfer Facility
Scope: Updated Traffic Impact Information in response to MassDEP’s July 10, 2024, Request for Information
Date and Time: November 13, 2024 at 6:00 PM
Location: Pulaski Elementary School, 1097 Braley Road, New Bedford, MA 02745
Notice also available in Kriolu | Português | Español
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Public Meeting Notice: Conservation Law Foundation Petition
Tuesday, October 29, 2024 at 6:00 PM
Notice: English | Kriolu | 中文 | Kreyòl Ayisyen | ភាសាខ្មែរ | Português | Español | Tiếng Việt
Petition: English
Presentation: MassDEP's Meeting Presentation
Response: MassDEP's Response to the CLF Petition for Rulemaking