PERMIT RATIONALE FOR REISSUANCE
Great River Utility Operating Company LLC, Taylor Greene Subdivision
Lafayette County
Taylor,, Mississippi
Water NPDES No. MS0059676
7/6/2026

I.	CLASSIFICATION –NPDES Commercial 

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater
III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated biologically by means of an activated sludge system followed by chlorine disinfection prior to discharge. Only one discharge to surface waters is described in the application. An expansion from the current treatment capacity of 0.025 MGD to 0.075 MGD was addressed in a previous permitting action. The Phase II limits included in the permit will become effective when the facility completes the necessary upgrades to increase its treatment capacity to 0.075 MGD.

IV.	RECEIVING WATERS – Taylor Creek. The receiving stream is located within the Yazoo River Basin and is classified as Fish and Wildlife. At the point of discharge, the receiving stream does not appear on the most recent State of Mississippi 303(d) List of Impaired Waterbodies, nor does the discharge appear on a completed Total Maximum Daily Load (TMDL).

V.	APPLICABLE GUIDLELINES – 11 Mississippi Admin Code Part 6, Wasteload Allocation (WLA), Commercial Facility Guidelines (Technology), State of Mississippi Water Quality Criteria (MSWQS)

VI.	SUMMARY OF LIMITATIONS – 

	Phase I

		Parameters			       Value			Basis
		Flow 				       0.025 MGD		Design
		BOD5				       30 mg/l 			Technology
		TSS				       30 mg/l 			Technology
		Dissolved Oxygen	   	       Report mg/l		WLA
		E. coli				       126 Col./100 ml 	MSWQS
		Chlorine, Total Residual    0.1 – 1.0 mg/l	Technology 
		pH				       6.0 – 9.0 SU			MSWQS

Dissolved oxygen in the aeration basin, 30-minute sludge settleability, and influent pH must also be reported. 

	Phase II		
		Parameters					    Value			Basis
		Flow 						    0.075 MGD			Design
		BOD5						    12 mg/l 			WLA
		Ammonia Nitrogen, as N	    2 mg/l			WLA
		TSS						    30 mg/l 			Technology
		Dissolved Oxygen		         ≥6.0 mg/l			WLA
		E. coli					        126 Col./100 ml 		MSWQS
		Chlorine, Total Residual	    0.1 – 1.0 mg/l			Technology 
		pH						    6.0 – 9.0 SU			MSQWS
		Nitrogen, Total			    Report mg/l			WLA
		Phosphorus, Total			    Report mg/l			WLA

Dissolved oxygen in the aeration basin, 30-minute sludge settleability, and influent pH must also be reported.