PERMIT RATIONALE FOR REISSUANCE
Alcorn County School District, Kossuth High School
Alcorn County
Kossuth, Mississippi
Water NPDES No. MS0029084
April 24, 2018

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 – An Unnamed Creek thence into Elroy Creek thence into Tuscumbia River Canal. Neither the Unnamed Creek nor Elroy Creek appear on the current 303(d) List of Impaired Waterbodies. However, the Tuscumbia River Canal does appear on the updated 303(d) List of Impaired Waterbodies with monitoring data for Aquatic Life Support due to Nutrients and Organic Enrichment/Low DO. The facility is included in a completed TMDL for Pathogens. The facility disinfects, which complies with the TMDL. These waterbodies are in the North Independent Streams river drainage basin, and are 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 (WPC-1), State of Mississippi Water Quality Criteria, Commercial Facility Guidelines

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

Parameter			Value					Basis
Flow				0.0225 MGD		Design
BOD				30 mg/l (Monthly Average)		Domestic Guidelines
TSS				30 mg/l (Monthly Average)		Domestic Guidelines
E. coli			   126 Col./100mL (Monthly Average)	Domestic Guidelines
Effluent pH			6.0 to 9.0 S.U.		MS WQS
Chlorine			0.1 to 1.0 mg/l		MS WQS

The Minimum and Maximum Values for Influent pH, Dissolved Oxygen in aeration unit, and 30-Minute Sludge Settleability in aeration unit must be reported. 

E. Coli will now be the bacterial indicator used for all freshwaters in MS designated as Recreation, Fish and Wildlife Support, and /or Public Water supply (replacing the use of fecal coliform).