PERMIT RATIONALE FOR REISSUANCE
Attala County Schools, McAdams High School
Attala County
McAdams, Mississippi
Water - NPDES Draft No. MS0029670
September 26, 2023

I.	CLASSIFICATION – Domestic NPDES

II.	DESCRIPTION OF WASTEWATER – Minor Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via a conventional lagoon prior to discharge. 

IV.	RECEIVING WATERS – Clear Branch thence into Long Creek thence into the Big Black River.  Clear Branch, Long Creek, and the Big Black River in Attala County do not appear on The State of Mississippi current 303(d) List of Waterbodies. This site is denoted in a pathogens TMDL for the Big Black River; the limitations proposed in this draft permit are consistent with Mississippi water quality standards and the TMDL.  The receiving waters are in the Big Black River drainage basin and are classified as Fish and Wildlife.  

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			Flow						Basis
Flow				0.021 MGD					Design
BOD5				30 mg/l (Max Monthly Average)		Technology
TSS				90 mg/l (Max Monthly Average)		Technology
E. Coli				126 Col./100 ml (Max Monthly Average)	Admin code	
Chlorine, Total Residual	0.1 – 1.0 SU					Technology
pH				6.0 – 9.0 SU					Admin code