PERMIT RAIONALE FOR REISSUANCE 
Great River Utility Operating Company LLC, Forrest Hills Subdivision
Lamar County
Oak Grove, Mississippi
Water NPDES No. MS0033171
June 8, 2026

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 – Sandy Run.  The receiving water is located within the Pascagoula 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 evaluated or impaired waterbodies. The facility appears on a TMDL for Pathogens and complies with the TMDL via disinfection. Only one discharge to surface waters is described within the application with no increase in treated effluent flow proposed.  

V.	APPLICABLE GUIDELINES – 11 Miss Admin Code, pt. 6, Commercial Guidelines (Technology)

VI.	SUMMARY OF LIMITATIONS – 
	Parameter					Value		Basis
	Flow						0.1 MGD		Design
	BOD5						30 mg/l		Technology
	TSS						60 mg/l 		Technology
	E. Coli					126 Col./100 ml		Admin Code
	Chlorine, Total Residual		0.1 – 1.0 mg/l		Admin Code
	pH						6.0 – 9.0 SU		Admin Code
	Ammonia Nitrogen	   4.0 mg/l		TMDL
	Dissolved Oxygen			6.0 mg/l (Minimum)	Technology