PERMIT RATIONALE FOR REISSUANCE
Glendora POTW
Tallahatchie County
Glendora, Mississippi
Water NPDES No. MS0048356
October 2025

I.	CLASSIFICATION – NPDES Municipal Minor

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Wastewater is biologically treated by means of 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 – Black Bayou thence into Tallahatchie River. The receiving waters are located in the Yazoo River drainage 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 Total Nitrogen and Total Phosphorus for Selected Large Waters in the Delta (June 2008). The TMDL does not prescribe any new or reduced limitations for the discharge.

At the point of discharge, the 7Q10 for the receiving stream is 0.1 cfs. The instream wastewater concentration of discharge can be determined by the following calculation:

IWC = {(QW)/(QW + Qr)}*100

Where, Qw = Permitted flow of the wastewater treatment facility, 0.02 MGD or 0.03 cfs
		 Qr = Receiving stream 7Q10, 0.1 cfs.

IWC = {(0.03 cfs)/(0.03 cfs + 0.1 cfs)}*100 = 23.6%

V.	APPLICABLE GUIDELINES – 11 Mississippi Admin Code pt. 6, Municipal Facility Guidelines (Technology), State of Mississippi Water Quality Criteria (MSWQS), Wasteload Allocation (WLA)

VI.	CHANGES FROM PREVIOUS PERMIT – 

There were no changes from last reissuance.

VII.	SUMMARY OF DISCHARGE LIMITATIONS – 

Parameter			Value		Basis
Flow				0.02 MGD		Design
BOD5				20 mg/l 		WLA
BOD5 (Percent Removal)	65% Minimum		Technology
TSS				90 mg/l 		Technology
TSS (Percent Removal)	65% Minimum		Technology
Ammonia Nitrogen		5 mg/l 		WLA
Dissolved Oxygen		6.0 mg/l Minimum		WLA
E. coli			 	126 Col./100mL		MSWQC
pH				6.0 – 9.0 SU		MSWQC
Total Residual Chlorine	0.047 mg/l		MSWQC, IWC
Total Nitrogen			Report lbs/day		WLA
Total Phosphorus		Report lbs/day		WLA