PERMIT RATIONALE FOR REISSUANCE
Ethel POTW
Attala County
Ethel, Mississippi
Water - NPDES No. MS0024791
October 23, 2017

I.	CLASSIFICATION – Minor Municipal NPDES
II.	DESCRIPTION OF WASTEWATER – Domestic
III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated through a lagoon followed by disinfection prior to discharge.  
IV.	RECEIVING WATERS – 
Yockanookany river does not appear on the current state of Mississippi 303(d) list for impaired waterbodies. A TMDL has been conducted for Mercury for Pearl River and Yockanookany River. Mercury minimization has been done in the previous permit. This waterbody is in the Pearl River drainage basin and is classified as Fish and Wildlife. IWC for receiving water is 3.2%.
V.	SUMMARY AND BASIS OF DISCHARGE LIMITATIONS –
	Parameter			Value				Basis
	Flow					0.09 MGD		Design
	BOD5                                                        30 mg/l		WLA
	Minimum DO				6.0 mg/l		WLA
	TSS					90 mg/l 		Technology Based
	E. Coli					126 Col./100 ml		MSWQS
	Chlorine, Total Residual	0.343 mg/l		WLA
	pH					6.0 – 9.0 SU		MSWQS
	BOD5, % Removal			85%			Municipal Guidelines
	TSS, % Removal		85%				Municipal Guidelines
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).