Title: What prompted the 1972 Clean Water Act?
 1What prompted the 1972 Clean Water Act? At 
which specific water pollution problems was it 
aimed?
- Death of 4 of 5 Great Lakes 
- Cayuhoga River Fire 
- Santa Barbara oil spill
Industrial discharges? Municipal sewage treatment 
plant discharges? Runoff? 
 2WATER POLLUTION PROBLEMS/SOURCES POLLUTANTS SOU
RCES Conventional Industrial discharges Non-conv
entional Municipal sewage Toxic treatment 
(POTW) discharges Runoff 
 3CWA SECTION 301(a) Except as in compliance 
various permitting provisions of the Act 
including Sections 402 and 404 of the Act of 
this title, the discharge of any pollutant by any 
person shall be unlawful. Section 402 
discharge permits Section 404 wetland 
permits Who issues these permits? 
 4CWA SECTION 402(a) NPDES Permits (1)  the 
Administrator may, after opportunity for public 
hearing issue a permit for the discharge of any 
pollutant, or combination of pollutants  upon 
condition that such discharge will meet the 
requirements of the Act. (2) The Administrator 
shall prescribe conditions for such permits , 
including conditions on data and information 
collection, reporting, and such other 
requirements as he deems appropriate.  
 5CWA requires permitted industrial dischargers to 
comply with the following technology-based 
effluent standards, created by EPA, for 
individual industrial categories. These 
standards reflect
 CONVEN. NON-CONV. TOXIC SOURCE POLL. POLL. POL
L. EXISTING BCT/BPT BAT BAT NEW BAT BAT BAT 
POTWs? 
 6- CWA Section 302 Permitting agency may impose 
 water-quality based limitations in permit
 whenever, in the judgment of the Administrator
 discharges of pollutants from a point source or
 group of point sources, with the application of
 technology-based effluent limitations  would
 interfere with the attainment or maintenance of
 that water quality in a specific portion of the
 navigable waters which shall assure protection of
 public health
- CWA Section 304 Specifies planning procedures 
 to ensure that water quality based permit limits
 will be imposed on dischargers into impaired
 waters.
-  TMDL program
7Municipal Sewage Treatment Plant (POTW) Standards
Primary treatment  settling/filtering Secondary 
treatment  biological Tertiary treatment  
chemical 
 8(No Transcript) 
 9Red  industrial discharger Blue  toxic 
release (air/water/land) 
 10NRDC v. Costle (D.C. Cir. 1977) To what EPA 
action is NRDC objecting here? Why did EPA 
interpret its regulatory jurisdiction 
restrictively? Why wouldnt they try to maximize 
their reach? 
 11DISCHARGE PROHIBITION
CWA SECTION 301(a) Except as in compliance 
various permitting provisions of the Act 
including Section 402s and 404 of the Act of 
this title, the discharge of any pollutant by any 
person shall be unlawful. 
 12Discharge Definition
CWA Section 502  (12) The term ''discharge of a 
pollutant'' and the term ''discharge of 
pollutants'' each means (A) any addition of any 
pollutant to navigable waters from any point 
source, (B) any addition of any pollutant to the 
waters of the contiguous zone or the ocean from 
any point source other than a vessel or other 
floating craft. 
 13Point source Definition
CWA Section 502
(14) The term ''point source'' means any 
discernible, confined and discrete conveyance, 
including but not limited to any pipe, ditch, 
channel, tunnel, conduit, well, discrete fissure, 
container, rolling stock, concentrated animal 
feeding operation, or vessel or other floating 
craft, from which pollutants are or may be 
discharged. This term does not include 
agricultural stormwater discharges and return 
flows from irrigated agriculture. 
 14NRDC v. Costle (D.C. Cir. 1977) To what EPA 
action is NRDC objecting here? Why did EPA 
interpret its regulatory jurisdiction 
restrictively? Why wouldnt they try to maximize 
their reach? Why did NRDC challenge EPAs 
action? What did the court think of EPAs 
rationale? What is the difference between an 
exemption and a general permit? 
 15NRDC v. Costle (D.C. Cir. 1977) To what EPA 
action is NRDC objecting here? Why did EPA 
interpret its regulatory jurisdiction 
restrictively? Why wouldnt they try to maximize 
their reach? Why did NRDC challenge EPAs 
action? What did the court think of EPAs 
rationale? What is the difference between an 
exemption and a general permit? Note that 
exemptions benefited agriculture, mostly. What 
if rain causes channeled runoff from a farm pond 
to escape into creek? Hydroelectric facility 
example. 
 16Pollutant Definition
CWA Section 502
(6) The term ''pollutant'' means dredged spoil, 
solid waste, incinerator residue, sewage, 
garbage, sewage sludge, munitions, chemical 
wastes, biological materials, radioactive 
materials, heat, wrecked or discarded equipment, 
rock, sand, cellar dirt and industrial, 
municipal, and agricultural waste discharged into 
water... 
 17U.S. v. Plaza Health Labs (2d Cir. 1993) How did 
this defendant violate the CWA, according to the 
prosecutor? What defenses did the defendant raise 
to liability? 
 18DISCHARGE PROHIBITION
CWA SECTION 301(a) Except as in compliance 
various permitting provisions of the Act 
including Section 402s and 404 of the Act of 
this title, the discharge of any pollutant by any 
person shall be unlawful. 
 19Discharge Definition
CWA Section 502  (12) The term ''discharge of a 
pollutant'' and the term ''discharge of 
pollutants'' each means (A) any addition of any 
pollutant to navigable waters from any point 
source, (B) any addition of any pollutant to the 
waters of the contiguous zone or the ocean from 
any point source other than a vessel or other 
floating craft. 
 20Point source Definition
CWA Section 502
(14) The term ''point source'' means any 
discernible, confined and discrete conveyance, 
including but not limited to any pipe, ditch, 
channel, tunnel, conduit, well, discrete fissure, 
container, rolling stock, concentrated animal 
feeding operation, or vessel or other floating 
craft, from which pollutants are or may be 
discharged. This term does not include 
agricultural stormwater discharges and return 
flows from irrigated agriculture. 
 21U.S. v. Plaza Health Labs (2d Cir. 1993) How did 
this defendant violate the CWA, according to the 
prosecutor? What defenses did the defendant raise 
to liability? With whom did the court side? 
Why? What was the dissents position. Do you 
agree with the majority or the dissent here?