PERMIT RATIONALE FOR REISSUANCE
Oxford, City of, Timber Lake Wastewater Treatment Facility
Lafayette County
Oxford,, Mississippi
Water NPDES No. MS0048166
December 17, 2025

I.	CLASSIFICATION – NPDES Commercial

II.	DESCRIPTION OF WASTEWATER – Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated biologically via an activated sludge plant followed by chlorine disinfection prior to discharge. Only one discharge to surface waters is described within the application with no increase in treated effluent flow proposed. 

IV.	RECEIVING WATERS – Unnamed tributary of Yellow Leaf Creek. The receiving waters are located in the Yazoo River drainage basin and are classified as Fish and Wildlife. At the point of discharge, the receiving stream does not appear on the current State of Mississippi 303(d) List of Impaired Waterbodies, nor does the discharge appear on a completed Total Maximum Daily Load (TMDL).

V.	APPLICABLE GUIDELINES – 11 Mississippi Admin Code pt. 6, Commercial Facility Guidelines (Technology), State of Mississippi Water Quality Criteria (MSWQS)

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

	Parameter		Value			Basis
	Flow			0.025 MGD		Design
	BOD			30 mg/l 		Technology
	TSS 			30 mg/l 		Technology
	E. coli			126 Col./100mL 	MSWQS
	pH			6.0 to 9.0 S.U.		MSWQS
	Chlorine		0.1 to 1.0 mg/l		Technology

Minimum and maximum values for influent pH, dissolved oxygen in the aeration basin, and 30-miunte sludge settleability in the aeration basin must also be reported. 
	
VII.	CHANGES FROM PREVIOUS PERMIT – 

No Changes from prior permit.