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 p.m. and Wednesday, January 28, 2026, at 2:00 p.m. 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 Amendments to 310 CMR 22.00 Drinking Water and 314 CMR 5.00 Ground Water Discharge Permit Program
Public Hearing: Tuesday, March 10, 2026, at 1:30 p.m. and 6:30 p.m. via Zoom. Registration required (use links in public notice).
Public comment period closes March 20, 2026 at 5:00 p.m.
Drinking Water Program (DWP) Public Notice: English | 中文 | 中文(繁體) | ភាសាខ្មែរ | Tiếng Việt | Kriolu | Português | Español
Ground Water Discharge Permit Program (GWDPP) Notice: English | 中文 | 中文(繁體) | ភាសាខ្មែរ | Tiếng Việt | Kriolu | Português | Español
Proposed DWP Amendments Excerpts Redline
Proposed DWP Amendments Full Redline
Proposed GWDPP Amendments Redline
Proposed DWP Amendments Excerpts Clean
Proposed DWP Amendments Full Clean
Proposed GWDPP Amendments Clean
Proposed Amendment to 310 CMR 7.40 Low Emission Vehicle Program
Public Hearing: March 16, 2026, at 10:30 a.m. and 5:00 p.m. via Zoom. Registration required. (See notice)
Public Comment Period: Ends March 26, 2026
Notice: English | 中文 | 中文(繁體) | Kreyòl Ayisyen | Português | Español | Tiếng Việt
Background Document
Amendment
Policies & guidance open for comment
Town of Dartmouth Composting Petition
Public Hearing: March 16, 2026, 2:00 p.m.
Hearing Notice: English | Kriolu | 中文(繁體) | Kreyòl Ayisyen | Português | Español | Tiếng Việt
Petition: English
MassDEP Noise Policy Discussion Document
Public Comment Period: Ends March 23, 2026, 5:00 p.m.
Noise Policy Discussion Document
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
Draft 2026 Intended Use Plan for the Clean Water State Revolving Fund
Draft 2026 Intended Use Plan for the Drinking Water State Revolving Fund
Public Comment Period: Ends March 24, 2026 at 12:00 p.m.
Public Notice: English
Draft 2026 Annual Ambient Air Quality Monitoring Network Plan
2026 Attachments 2 & 3: Site Measurements & Measurement Methods
Public Comment Period: Ends April 6, 2026
Public Notice: English | Español | Kreyòl Ayisyen | Português | 中文 | 中文(繁體) | ភាសាខ្មែរ
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 7.02(14) to Extend Cumulative Impact Analysis Program Review Deadline
Public Hearing: March 3, 2026, at 10:00 a.m. and 6:00 p.m. via Zoom. Registration required. (See notice)
Public comment period closed March 13, 2026
Notice: English | Español | Português | Kreyòl Ayisyen | 中文 | 中文(繁體) | ភាសាខ្មែរ | Tiếng Việt | Kriolu
Background Document
Amendment
————————
Proposed Amendment to 310 CMR 7.00 Appendix C Operating Permit and Compliance Program
Public Hearing: September 30, 2025 at 10:00 a.m. and 6:00 p.m. 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
————————
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
————————
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
————————
Public Comment Notice - BESS - EV Charger Guidance
Public comment period closed June 11, 2025
Notice: English
————————
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 a.m. and 6:00 p.m. 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
————————
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 p.m.
Location: Pulaski Elementary School, 1097 Braley Road, New Bedford, MA 02745
Notice also available in Kriolu | Português | Español
————————
Public Meeting Notice: Conservation Law Foundation Petition
Tuesday, October 29, 2024 at 6:00 p.m.
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