Md. Code, Environment § 9-331
Md. Code, Environment § 9-331
in effectBy rule, regulation, order, permit, or otherwise, the Department may require the owner or operator of any source of a discharge of pollutants or of any source that is an industrial user of a publicly owned treatment works:
(1) To keep records;
(2) To make reports;
(3) To install, calibrate, use, and maintain monitoring equipment or methods, including, where appropriate, biological monitoring methods;
(4) To sample discharges in accordance with the methods, at the locations, at the intervals, and in the manner the Department requires; and
(5) To provide to the Department any information that the Department reasonably requires about:
(i) Discharge of pollutants into the waters of this State; or
(ii) Introduction of pollutants into publicly owned treatment works.
Source: Open US Law by Vaquill AI (CC BY 4.0)URL: https://mgaleg.maryland.gov/mgawebsite/Laws/StatuteText?article=gen§ion=9-331&enactments=falseFetched: 10/17/2026