PERMIT RATIONALE FOR REISSUANCE
Great River Utility Operating Company LLC, Wellsgate Subdivision
Lafayette County
Oxford,, Mississippi
Water NPDES No. MS0061760
7/30/2026

I.	CLASSIFICATION – NPDES Commercial

II.	DESCRIPTION OF WASTEWATER – Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated by an aerated lagoon 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 West Gosse Valley 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), Wasteload Allocation (WLA)

VI.	CHANGES FROM PREVIOUS PERMIT – 

No changes from previous permit.

VII.	SUMMARY OF DISCHARGE LIMITATIONS – 

		Parameter			Value			Basis
		Flow				0.086 MGD		Design
		BOD				9 mg/l 			WLA
		Ammonia Nitrogen		2 mg/l			WLA
		Dissolved Oxygen		6.0 mg/l minimum	WLA
		TSS 				60 mg/l 		Technology
		E. coli				126 Col./100mL 	MSWQS
		pH				6.0 to 9.0 S.U.		MSWQS
		Chlorine			0.011 mg/l		MSWQS
		Total Nitrogen			Report lbs/day 	WLA
		Total Phosphorus		Report lbs/day		WLA

BOD, Ammonia Nitrogen, and Dissolved Oxygen limits are based on a Wasteload
Allocation modeled for oxygen depletion in the receiving stream, and toxicity limits were
determined for the parameters that are potentially acutely and chronically toxic (Ammonia
Nitrogen and Chlorine). The more stringent of the modeled limit and the toxicity limit (for
Ammonia Nitrogen) is what is given in the Wasteload Allocation to meet Water Quality
Based Effluent Limitations.