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This approval serves to protect the public's health and welfare by insuring that minimum drinking water requirements are met in modifications of drinking water distribution systems, such as storage tanks, distribution pump stations, and transmission main installation. Legislative authority is stated in MGL Chapter 111, section 160A. Regulatory authority is stated in 310 CMR 22.04 of the Drinking Water Regulations.
Public water suppliers or their representatives must apply if they want approval for modification of their distribution system.
If the water supplier or their representative apply for this approval it may be necessary to apply for other water treatment approvals WS 23 or WS 24.
Note: Approvals of this type may require MEPA review. Please carefully examine 301 CMR 11.00, the MEPA Regulations, to determine if your project exceeds the MEPA review thresholds, or for more information contact the MEPA Unit of the Executive Office of Environmental Affairs (100 Cambridge Street, Boston, MA 02202; (617-727-5830). MassDEP cannot begin technical review of the application until the MEPA process has been completed, unless otherwise agreed to in writing. Copies of MEPA filings (with reference to any applicable Transmittal numbers) should be sent to the appropriate program offices in Boston and the MEPA Coordinator in the appropriate Regional Office.
Note: These additional requirements are intended to serve as a guide to the applicant. It does not necessarily include all additional requirements.
See details below.
Guidance on how to prepare your application, including a completeness check.
You may fill out and save the Microsoft Word form on your computer. The PDF version has to be printed out and completed by hand.
A unique Transmittal Number is needed for each application you submit to MassDEP.
Submit your application fee payment and a copy of your Transmittal Form to:
Department of Environmental Protection
P.O. Box 4062
Boston, MA 02211
Submit your completed, signed application and your original Transmittal Form to the appropriate MassDEP Regional Office (see listing below).