PERMIT RATIONALE FOR REISSUANCE
Dixie Electric Power Association
Jones County
Laurel, Mississippi
Water NPDES No. MS0032042
May 31, 2023

I.	CLASSIFICATION – Commercial NPDES

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated by means of a conventional lagoon followed by disinfection. No increase in treatment capacity is proposed within the application. 

IV.	RECEIVING WATERS – Dry Swamp Creek thence into Bogue Homo Creek. The receiving waters are located within the Pascagoula River Basin and are classified as Fish and Wildlife. Neither Dry Swamp Creek nor Bogue Homo Creek appear on the 2022 State of Mississippi 303(d) List of Impaired Waterbodies. The discharge is listed in the Total Maximum Daily Load (TMDL) for biological impairment due to organic enrichment/low dissolved oxygen and nutrients (June 2005). The TMDL does not place any limits on Dixie Electric Power Association’s current discharge. Only one discharge to surface waters is described within the application with no increase in flow proposed. 

V.	APPLICABLE GUIDELINES – State of Mississippi Wastewater Regulations, State of Mississippi Water Quality Criteria, Commercial Facility Guidelines

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 
Parameter			Value			Basis
Flow				0.015 MGD			Design
BOD				30 mg/l (Monthly Average)		Domestic Guidelines
TSS				90 mg/l (Monthly Average)		Technology
E. coli				126 Col./100mL (Monthly Average)	MS WQS
Phosphorus, Total		Report mg/l (Monthly Average)	TMDL
Nitrogen, Total		Report mg/l (Monthly Average)	TMDL
Chlorine, Total Residual	0.1 to 1.0 mg/l			Domestic Guidelines
pH				6.0 to 9.0 U.S.				MS WQS