PERMIT RATIONALE FOR REISSUANCE
Great River Utility Operating Company, LLC, North Woolmarket Village Estates
Harrison County
Woolmarket, Mississippi
Water NPDES No. MS0049298
May 2025

I.	CLASSIFICATION – NPDES Commercial

II.	DESCRIPTION OF WASTEWATER – Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via 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 – Howard Creek. The receiving waters are located in the Coastal Streams 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. The discharge does appear on a completed Total Maximum Daily Load (TMDL) for Fecal Coliform in the Back Bay of Biloxi and Biloxi Bay (January 2002). The facility utilizes chlorine disinfection, which complies with the conditions of the TMDL.

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

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

	Parameter		Value			Basis
	Flow			0.063 MGD		Design
	BOD			30 mg/l 			Technology
	Ammonia Nitrogen	Report mg/l		WLA
	Dissolved Oxygen	≥ 6.0 mg/l		WLA
	TSS 			60 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