PERMIT RATIONALE FOR REISSUANCE
Mississippi Wildlife Fisheries and Parks, Lake Lowndes State Park
Lowndes County
Columbus, Mississippi
Water NPDES No. MS0032859
October 24, 2017

I.	CLASSIFICATION – Domestic NPDES

II.	DESCRIPTION OF WASTEWATER – Minor Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via an activated sludge system.  

IV.	RECEIVING WATERS – Ellis Creek thence into the Tombigbee River.  Ellis Creek does not appear on the current 303(d) List of Impaired Waterbodies nor a TMDL has been conducted for this receiving stream. This waterbody is in the Tombigbee River drainage basin.  Ellis Creek is classified as Fish and Wildlife.

V.	APPLICABLE GUIDELINES – State of Mississippi Wastewater Regulations (WPC-1),  State of Mississippi Water Quality Criteria, Commercial Facility Guidelines

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

Parameter		Value					Basis
Flow			0.02 MGD				Design
BOD			30 mg/l (Yearly Average)		Previous Permit
TSS			30 mg/l (Yearly Average)		Domestic Guidelines
E. Coli			126 Col./100mL (Yearly Average)	Domestic Guidelines
Effluent pH		6.0 to 9.0 S.U.				MS WQS
Chlorine		0.1 to 1.0 mg/l				Domestic Guidelines
	
The minimum and maximum values for Influent ph, Dissolved Oxygen in aeration unit, and 30-Minute Sludge Settleability in aeration unit must be reported