PERMIT RATIONALE FOR REISSUANCE
Pearl River County Utility Authority, Pearl River County Justice Facility
Pearl River County
Poplarville, Mississippi
Water NPDES No. MS0058513
May 2024

I.	FACILITY INFORMATION

Facility Name:  Pearl River County Utility Authority, Pearl River County Justice Facility
Facility Address:  171 Savanah Millard Road 
Poplarville, MS  39470    
Picayune, 
Permit No.:  MS0058513
SIC:  9223
Permit Writer:  Christiana Boren
EPD Branch:  Municipal and Private Facilities

I.	CLASSIFICATION – NPDES Minor Municipal

II.	DESCRIPTION OF WASTEWATER – Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via an activated sludge system followed by UV disinfection and post aeration 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 creek thence into Hobolochitto Creek. The receiving waters are located in the Pearl 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, Municipal Facility Guidelines (Technology), State of Mississippi Water Quality Criteria (MSWQS), Wasteload Allocation (WLA)

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

	Parameter			Value			Basis
	Flow				0.1 MGD			Design
	BOD				30 mg/l 			Technology
	Ammonia Nitrogen		2.0 mg/l			WLA
	TSS 				30 mg/l 			Technology
	Dissolved Oxygen		6.0 mg/l minimum		WLA
	E. coli				126 Col./100mL 		MSWQS
	pH				6.0 to 9.0 S.U.			MSWQS
	Chlorine				0.011 mg/l			MSWQS

Minimum and maximum values for influent pH, dissolved oxygen in the aeration basin, and 30-minute sludge settleability in the aeration basin must also be monitored.

The chlorine limit is included in the draft permit in the event that chlorine must be used as a backup to the UV disinfection process.

VII.	CHANGES FROM PREVIOUS PERMIT – None.