Combined Sewer Overflows
- CSOs - Frequently Asked Questions
What is a combined sewer overflow, what communities should do, and what Massachusetts is doing to control CSOs.
- Sanitary Sewer Systems & Combined Sewer Overflows
Guidance for owners, managers and operators of wastewater treatment systems seeking to optimize operation of their systems as well as information about notifying MassDEP about emergency overflows, bypasses, and sewage backups.
- Massachusetts Water Resources Authority Combined Sewer Overflow Variances
These variances authorize limited combined-sewer-overflow discharges into the respective waterbodies, as permitted under 314 CMR 4.00, to provide for the completion of long-term CSO controls. Updated May 2017.
Sanitary Sewer Overflow/Bypass/Backup Notification Form
- Sanitary Sewer Overflow/Bypass/Backup Notification
In the event of an overflow or bypass of a sanitary sewer, the owner or operator of the involved facility must notify MassDEP, and other state and federal entities as necessary, within 24 hours.
Wastewater & Sewer Regulations
- Fact Sheet: Revised Sewer Regulations and Operation & Maintenance Regulations
Explanations of revisions promulgated in 2014 to streamline approval requirements for sewer extensions and sanitary and industrial wastewater sewer connections, and to make modifications to operation and maintenance requirements. May 2014.
- 310 CMR 32.00: Land Application of Sludge and Septage
Regulating the land application of sludge and septage for beneficial purposes without contaminating soil or water sources.
- 314 CMR 3.00: Surface Water Discharge Permit Program
Regulates surface water discharges in Massachusetts waters under the provisions of state and federal clean-water legislation.
- 314 CMR 7.00: Sewer System Extension & Connection Permit Program
This regulation governs sewer system connections and extensions to ensure proper operation of wastewater treatment facilities.
- 314 CMR 8.00: Supplemental Requirements for Hazardous Waste Management Facilities
Regulating wastewater treatment plants that treat, store, or dispose of hazardous wastes generated at the plant.
- 314 CMR 12.00: Operation & Maintenance & Pretreatment Standards for Wastewater Treatment Works and Indirect Dischargers
Establishes standards and pretreatment requirements to insure the proper operation and maintenance of wastewater treatment works. April 2014
- Annual Sewer Connection Report Form
This reporting form is provided to satisfy the requirements of 314 CMR 12.07, Recordkeeping and Reporting. February 2015.
- 314 CMR 18.00: Industrial Wastewater Holding Tank and Container Construction, Operation, and Record-keeping Requirements
Construction, operation, and record-keeping requirements for industrial-wastewater holding tanks.
- Task Force on Building Organics Capacity
MassDEP established this Task Force to help develop recommendations for overcoming barriers to the siting and development of additional anaerobic digestion, composting and recycling capacity in Massachusetts.
- Regulation of Industrial Wastewater Holding Tanks & Containers
All owners and operators of industrial wastewater holding tanks (IWHTs), mobile tanks and containers used exclusively to accumulate or store non-hazardous, non-sanitary wastewater are required to comply with a Massachusetts Department of Environmental Protection (MassDEP) industrial wastewater holding tank regulation (found at 314 CMR 18.00).
- 257 CMR 2.00: Certification of Wastewater Treatment Plant Operators
The process for evaluation and certification of wastewater-treatment-facility operators.
Combined Sewer Overflows Policies & Guidance
- Guidance for Abatement of Pollution from CSO Discharges
Assisting permittees in assessing combined-sewer-overflow impacts and developing control alternatives in compliance with the federal Clean Water Act and the Massachusetts Water Quality Standards.
- Pollution Abatement from Combined Sewer Overflows - Policy
The CSO Policy describes a hierarchical menu of options within the Surface Water Quality Standards to accommodate the range of situations in which CSOs are found.
Sewer Collection Systems Policies & Guidance
- Guidelines for Performing Infiltration/Inflow Analyses and Sewer System Evaluation Surveys file size 2MB
These guidelines are intended to aid communities in performing infiltration/inflow (I/I) analyses by providing a systematic, comprehensive approach for conducting sewer system evaluations; and to provide information to assist sewer system authorities with fulfilling the requirements of the federal and state Clean Water Acts and the MassDEP regulations at 314 CMR 12.00. May 2017.
- Response to Comments for Draft Guidelines for Performing Infiltration/Inflow Analyses and Sewer System Evaluation Surveys
This document provides responses to comments received in response to the 2016 Draft Guidelines. May 2017.
- Frequently Asked Questions on Regulatory Requirements for Infiltration & Inflow (I/I) Removal Programs
Description text: This document provides answers to common questions regarding MassDEP's I/I regulatory requirements and the 2017 Guidelines. May 2017.
- Presentation on Infiltration and Inflow Regulatory Requirements file size 2MB
This presentation summarizes MassDEP's Infiltration and Inflow regulatory requirements and the 2017 Guidelines. May 2017.
- Fact Sheet: Regulatory Requirements for Infiltration & Inflow (I/I) Removal Programs
This document summarizes MassDEP's Infiltration and Inflow regulatory requirements and the 2017 guidelines. May 2017.
- Cover Letter for Optimizing Operation, maintenance, and rehabilitation of sanitary sewer collection systems - Guidelines
Information for state agencies and collection system owners, managers, and operators to manage sewerage-collection systems for optimal performance and reduced overall long-term costs.
- Optimizing Operation, maintenance, and rehabilitation of sanitary sewer collection systems - Guidelines file size 3MB
This document highlights areas of day-to-day operation and maintenance and long-term system planning that can be implemented, improved upon, or documented in order to optimize system performance, enhance program effectiveness, and reduce overall long-term costs.