40 CFR § 1700.8
Discharges for which no-discharge zones can be established
June 9, 2020
(a) A no-discharge zone may be established by State prohibition for any discharge listed in §1700.4 or §1700.5 following the procedures in §1700.9. A no-discharge zone established by a State using these procedures may apply only to those discharges that have been preempted from other State or local regulation pursuant to §1700.6.
(b) A no-discharge zone may be established by EPA prohibition for any discharge listed in §1700.4 or §1700.5 following the procedures in §1700.10.