PERMIT RATIONALE FOR REISSUANCE
Lowndes County School District, West Lowndes Elementary School
Lowndes County
Columbus, Mississippi
Water NPDES No. MS0044881
November 14, 2023

I.	CLASSIFICATION – Domestic NPDES

II.	DESCRIPTION OF WASTEWATER – Minor Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via an aerated lagoon.  

IV.	RECEIVING WATERS –  Gilmer Creek.  Gilmer 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. Gilmer Creek is classified as Fish and Wildlife.  One discharge to surface waters is described within the application with no increase in flow proposed. The discharge from this facility should not further impair water quality.

V.	APPLICABLE GUIDELINES – State of Mississippi Wastewater Regulations (11 MS admin code part 6),  State of Mississippi Water Quality Criteria, Commercial Facility Guidelines

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

Parameter		Value					Basis
Flow			0.011 MGD				Design
BOD			30 mg/l				Domestic Guidelines
TSS			60 mg/l				Domestic Guidelines
E. Coli			126 Col./100mL			Domestic Guidelines
Effluent pH		6.0 to 9.0 S.U.				Admin code
Chlorine		0.1 to 1.0 mg/l				Admin code