De Minimis categorization.
Riverside Municipal Code § 14.12.355
in effect14.12.355 - De Minimis categorization.
Any user whose industrial wastewater discharge is less than 100 gallons per day and is not regulated by a federal categorical pretreatment standard or industrial user group permit may be classified in the Director's discretion as a De Minimis user and shall not be subject to permitting standards or local limits provided that such industrial wastewater discharge is not a hazardous substance, does not contribute to interference or pass through violations at the POTW or violations of the NPDES permit, and does not cause detrimental effects or damage to the POTW, or cause a threat of harm to City personnel, the public, or the environment. De Minimis user status shall terminate upon violation of this section, or upon written notice to such discharger of Director's determination that such discharger no longer satisfies the criteria of this section. Industries that discharge greater than 100 gallons per day may qualify under a Wastewater Discharge Authorization Certificate (WDAC).
(Ord. 7551 §25, 2021; Ord. 7362 §6, 2017; Ord. 7032 §2, 2009; Ord. 6637 §2 (part), 2002; Ord. 6232 §2 (part), 1995)
Source: City of Riverside, California, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ca/riverside/codes/code_of_ordinances?nodeId=PTIICOOR_TIT14PUUT_CH14.12DIWAINPUSEPOINSTDRSY_DIVIIIINWA_14.12.355DEMICAFetched: 11/1/2026