STOP CSO Act of 2021

To amend the Federal Water Pollution Control Act to ensure that publicly owned treatment works monitor for and report sewer overflows, and for other purposes. 1. Short title This Act may be cited as the Sewage Treatment Overflow Prevention through Community Sanitation Outreach Act of 2021 STOP CSO Act of 2021 2. Monitoring, reporting, and public notification of sewer overflows (a) Sewer overflow and stormwater reuse municipal grants Section 221(a) of the Federal Water Pollution Control Act ( 33 U.S.C. 1301(a) (3) Use of funds A State may use funding provided by a grant under this subsection for monitoring, reporting, and notification required under section 402(t). . (b) National pollutant discharge elimination system Section 402 of the Federal Water Pollution Control Act ( 33 U.S.C. 1342 (1) in subsection (b)(2)(B), by inserting this section and required in (2) by adding at the end the following: (t) Sewer Overflow Monitoring, Reporting, and Notifications (1) General requirements After the last day of the 180-day period beginning on the date on which regulations are issued under paragraph (4), a permit issued, renewed, or modified under this section by the Administrator (or a State, in the case of a permit program approved by the Administrator) for a publicly owned treatment works shall require the owner or operator of the treatment works to— (A) institute and utilize a feasible methodology, technology, or management program for monitoring sewer overflows to alert the owner or operator to the occurrence of a sewer overflow in a timely manner; (B) in the case of a sewer overflow that has the potential to affect human health, notify the public of the overflow as soon as practicable, but in no case more than 4 hours, after the time the owner or operator knows of the overflow; (C) in the case of a sewer overflow that may imminently and substantially endanger human health, notify public health authorities and other affected entities, such as public water systems, of the overflow immediately after the owner or operator knows of the overflow; and (D) report each sewer overflow to the Administrator (or the State), describing— (i) the magnitude, duration, and suspected cause of the overflow; (ii) the steps taken or planned to reduce, eliminate, or prevent a recurrence of the overflow; and (iii) the steps taken or planned to mitigate the adverse effects of the overflow. (2) Exception The reporting requirements of paragraph (1)(D) shall not apply to a sewer overflow that is a release of wastewater that occurs in the course of maintenance of a treatment works, is managed consistently with best management practices for treatment works, and is intended to prevent sewer overflows. (3) Annual report In the case of a permit program approved by the Administrator, the State shall submit to the Administrator an annual report describing sewer overflows reported to the State under paragraph (1)(D). (4) Rulemaking Not later than one year after the date of enactment of this subsection, the Administrator shall issue regulations to implement this subsection, including regulations to— (A) establish a set of criteria to guide the owner or operator of a publicly owned treatment works in— (i) assessing whether a sewer overflow has the potential to affect human health or may imminently and substantially endanger human health; and (ii) developing communication measures that are sufficient to give notice under paragraphs (1)(B) and (1)(C); and (B) define the terms feasible timely (5) Special rules concerning application of notification requirements After the last day of the 30-day period beginning on the date on which the Administrator issues regulations under paragraph (4), the requirements of paragraphs (1)(B) and (1)(C) shall apply to the owner or operator of a publicly owned treatment works until such date as a permit is issued, renewed, or modified under this section in accordance with paragraph (1). (6) Statutory Construction Nothing in this subsection applies to a wastewater backup that will not result in a discharge into waters of the United States. (7) Definition of sewer overflow In this subsection, the term sewer overflow . 3. Eligibility for assistance Section 603(c) of the Federal Water Pollution Control Act ( 33 U.S.C. 1383(c) (1) in paragraph (11)(B), by striking ; and (2) in paragraph (12)(B), by striking the period and inserting ; and (3) by adding at the end the following: (13) for the implementation of monitoring for sewer overflows required under section 402(t). .

Summary: Sewage Treatment Overflow Prevention through Community Sanitation Outreach Act of 2021 or the STOP CSO Act of 2021 This bill revises the National Pollutant Discharge Elimination System permit program to require certain publicly owned water treatment facilities to monitor, report on, and notify the public of sewer overflows. For example, the facilities must notify the public within a specified number of hours after (1) sewer overflows that have the potential to affect human health, and (2) sewer overflows that may imminently and substantially endanger human health.