§ 9–353
Statutes in effect as of October 1, 2026.
Md. Code Ann., Envir. § 9-353 (2026)
Title 9. Water, Ice, and Sanitary Facilities
Subtitle 3. Water Pollution Control
§ 9–353LinkCopy Citation
(a)
In this part the following words have the meanings indicated.
(b)
(1)
“Industrial user” means:
(i)
A person who is engaged in manufacturing, fabricating, or assembling goods; or
(ii)
A member of any class of significant producers of pollutants identified under regulations adopted by:
(1)
The Secretary; or
(2)
The Administrator of the U.S. Environmental Protection Agency.
(2)
“Industrial user” does not include the federal, State, and local governments.
(c)
“PFAS chemicals” means a class of fluorinated organic chemicals that contain at least one fully fluorinated carbon atom, including perfluoroalkyl and polyfluoroalkyl substances.
(d)
“Pretreatment permit” means a document issued by the Department or the Department’s designee that authorizes a significant industrial user to introduce industrial wastes into a publicly owned treatment works in compliance with the pretreatment requirements under COMAR 26.08.01.01B(69).
(e)
(1)
“Significant industrial user” means an industrial user that:
(i)
Is subject to categorical pretreatment standards under 40 C.F.R. Part 403.6;
(ii)
Discharges an average of 25,000 gallons per day or more of processed wastewater to a publicly owned treatment works, not including sanitary, noncontact cooling, and boiler blowdown wastewater;
(iii)
Contributes processed wastewater that makes up 5% or more of the average dry–weather hydraulic or organic capacity of the publicly owned treatment works; or
(iv)
Is designated as a significant industrial user by the publicly owned treatment works on the basis that the industrial user has:
(1)
A reasonable potential for adversely affecting the wastewater treatment plant’s operations and sewer system; or
(2)
Violated a pretreatment standard or requirement.
(2)
“Significant industrial user” does not include the federal, State, and local governments.
(f)
“Waters of the State” includes:
(1)
Both surface and underground waters within the boundaries of the State subject to its jurisdiction;
(2)
That portion of the Atlantic Ocean within the boundaries of the State;
(3)
The Chesapeake Bay and its tributaries;
(4)
All ponds, lakes, rivers, streams, public ditches, tax ditches, and public drainage systems within the State, other than those designed and used to collect, convey, or dispose of sanitary sewage; and
(5)
The floodplain of free–flowing waters determined by the Department on the basis of the 100–year flood frequency.