Mass. Gen. Laws ch. 21, § 43A
(a) As used in this section, the following words shall, unless the context clearly requires otherwise, have the following meanings:
″Combined sewer system″, a sewer system designed to collect and convey storm water runoff and sewage in shared piping.
″Department″, the department of environmental protection.
″Discharge″ or ″discharging″, a release or diversion of sewage, industrial waste or other effluent, which is untreated or partially treated, including from a combined sewer system overflow, that is emitted from an outfall directly or indirectly into waters of the commonwealth.
″Outfall″, an outlet designed for the purpose of allowing a discharge that is part of, or connected to, a combined sewer system, sanitary sewer system or treatment works, including a connection to any such system or facility intended to allow wastewater to divert or bypass treatment by a facility.
″Permittee″, a person granted a permit under section 43 to operate and maintain a particular outlet for the discharge of pollutants into waters of the commonwealth or a person discharging pollutants from an outlet without a required permit or in violation of the conditions of a valid permit.
(b) A permittee shall issue a public advisory when there is a discharge from the permittee's outfall in accordance with this section. The department may allow a permittee to issue a combined advisory message when a weather event or other related occurrence involves more than 1 of the permittee's outfalls discharging into the same water body or waterway. A permittee shall update its advisory as required by the department. A permittee shall issue an updated public advisory every 8 hours for an ongoing discharge and within 2 hours when a discharge ceases or is projected to cease, unless the department requires otherwise.
A public advisory shall, to the extent a permittee has the information available, describe in plain language the: (i) outfall's location; (ii) approximate time, date and duration of the discharge; (iii) estimated volume of the outfall discharge based on the average discharge from data reported to the department for the prior 3 calendar years; (iv) waters and land areas affected or expected to be affected by the discharge; (v) identity of the outfall permittee; (vi) precautionary measures for the public to avoid health risks from contact with effluent; and (vii) any other information required by the department. In addition, the public advisory shall include a statement that the outfall discharge consists, or likely consists, of untreated sewage and waste.
(g) A permittee shall coordinate with the department to establish the metering, modeling or other method the permittee shall use to determine or discover when a discharge occurs at its outfall to comply with the notification requirements of this section. If an outfall will not have metering equipment to detect and transmit reliable information about a discharge within the timeframes established by subsections (c) and (d), the permittee shall apply to the commissioner for authorization to use another method. The commissioner shall approve the proposed method, provided the permittee can obtain reliable information by such method about any discharge from its outfall and issue public advisories within said established timeframes.
If the proposed method or the current discharge detection capabilities of the permittee's outfall will not provide timely or reliable information, the commissioner may extend the time for a permittee to issue a public advisory; provided, that such time shall be extended only as necessary, and by not more than 24 hours after discovery of the discharge. A permittee that has been granted an extension shall make necessary improvements to its outfall, if any, to detect an outfall discharge within the timeframes established pursuant to subsections (c) and (d).
Upon application of the permittee, the commissioner may waive any requirement under this section related to a permittee's outfall; provided, that: (i) the outfall is decommissioned; or (ii) there has not been significant discharge from the outfall, as determined by the department, during the preceding 5 years; and (iii) the waiver will not pose a substantial threat to public health or to the environment. A waiver shall be valid for not more than 5 years. Authorizations and waivers allowed by the commissioner under this subsection shall be in writing and shall specify the conditions for each waiver.
(iv) provide information for the public to subscribe to notifications about outfall discharges in local area waters; and (v) provide other information as required by the department. Such signage shall conform to all applicable provisions of federal law and regulations. The department shall coordinate with the department of conservation and recreation, municipalities and other landowners that have public access points that may be affected by a discharge, for the placement and maintenance of such signage on public and private property.
(i) The department shall provide information about discharge notifications sent by permittees to the department under subsection (c) on its website. The website shall: