PERMIT RATIONALE FOR REISSUANCE
Falcon POTW
Quitman County
Sledge, Mississippi
Water NPDES No. MS0036731
October 14, 2025

I.	CLASSIFICATION – NPDES Municipal Minor 

II.	DESCRIPTION OF WASTEWATER – Domestic/ Municipal Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via a conventional lagoon followed by chlorine disinfection prior to discharge. Only one discharge to surface waters is described within the application with no increase in treated effluent flow proposed.

IV.	RECEIVING WATERS – Burrell Bayou.  The receiving waters are located within the Yazoo River Basin and are classified as Fish and Wildlife.  At the point of discharge, the receiving stream does not appear on the current State of Mississippi 303(d) List of Impaired Waterbodies. The discharge does appear on a completed Total Maximum Daily Load (TMDL) for Organic Enrichment/Low DO and Nutrients in the Coldwater River (June 2003). The TMDL does not prescribe any reduction in the currently permitted limits. The Instream Wastewater Concentration (IWC) for the discharge is determined using the equation below:
IWC = {(Qw)/(Qw + Qr)}*100
	Where, Qw = Design flow of the wastewater treatment facility, 0.023 MGD or 0.035 cfs
	             Qr = Receiving stream 7Q10, 2 cfs.

IWC = {(0.035 cfs)/(0.035 cfs + 2 cfs)}*100 = 1.75 %
 
V.	APPLICABLE GUIDELINES – 11 Mississippi Admin Code pt. 6, TMDL Wasteload Allocation (WLA)

VI.	SUMMARY OF LIMITATIONS –
Parameter			Flow				Basis
Flow				0.023 MGD			Design
BOD5				25 mg/l 			WLA
BOD (Percent Removal)	65% Minimum		Technology
Dissolved Oxygen		6 mg/l Miniimum		WLA
TSS				90 mg/l 			Technology
TSS (Percent Removal)	65% Minimum		Technology
NH3-N				12 mg/l			WLA
E. coli				126 Col./100 ml		Admin code	
Chlorine, Total Residual	0.63 mg/l 			Admin code
pH				6.0 – 9.0 SU			Admin code
Total Nitrogen			Report (lbs/day)		WLA
Total Phosphorus		Report (lbs/day)		WLA