PERMIT RATIONALE FOR REISSUANCE
Great River Utility Operating Company LLC, Reese Creek Lagoon
Forrest County
Petal, Mississippi
Water NPDES No. MS0057037
August 22, 2025

I.	CLASSIFICATION – Commercial NPDES 

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated biologically by means of an aerated lagoon followed by disinfection.  No increase in treated effluent flow is proposed within the application.  

IV.	RECEIVING WATERS – Reese Creek. The receiving stream is located within the Pascagoula River Basin and is classified as Fish and Wildlife.  At the point of discharge the receiving stream does appear on the current State of Mississippi 303(d) list of evaluated or impaired waterbodies.  Specifically, waterbody ID 416213 is listed for Organic Enrichment/ Low Dissolved Oxygen.  The listing is near Hattiesburg from headwaters to Temple Road.  Only one discharge to surface waters is described within the application with no increase in flow proposed.  The existing discharge should not further impair water quality.  

V.	APPLICABLE GUIDELINES – 11 MS Admin Code, Domestic Guidelines (Technology) 

VI.	SUMMARY OF LIMITATIONS –
	Parameter						Value			Basis
	Flow						0.099 MGD			Design
	BOD5						30 mg/l (Yearly Average)	Domestic Guidelines
	TSS						60 mg/l (Yearly Average)	Domestic Guidelines
	E. coli	 					126 Col./100 ml 			Admin Code
	Chlorine, Total Residual 			0.1 – 1.0 mg/l			Domestic Guidelines 
	pH						6.0 – 9.0 SU			Admin Code