PERMIT RATIONALE FOR REISSUANCE
West Madison Utility District
Madison County
Flora, Mississippi
Water - NPDES Draft No. MS0033081
August 2024

I.	FACILITY INFORMATION

Facility Name:  West Madison Utility District
Facility Address:  Trussell Road 
 Flora, MS  39071    Flora, 
Permit No.:  MS0033081
SIC:  4952, sewerage systems
Permit Writer:  Dmitriy Asanov 
EPD Branch:  Municipal and Private Facilities Branch 
II.	CLASSIFICATION - Municipal Minor
III.	DESCRIPTION OF WASTEWATER – Domestic wastewater 
IV.	DESCRIPTION OF WASTEWATER TREATMENT – Wastewater is biologically treated by means of an aerated lagoon followed by disinfection by chlorination prior to discharge.  The current design capacity of the facility is 0.1 MGD.  
V.	RECEIVING WATERS – Big Black River.  This section of the Big Black does not appear on the current State of Mississippi List of Waterbodies.  There are three TMDL’s for this section of the Big Black River; they are for pesticides, sediment, and pathogens.   The sediment TMDL does not recommend any new or modified requirements for this site.  The TMDL for pesticides also does not propose requirements for this site.  In regards to the pathogens TMDL, 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. 
VI.	APPLICABLE GUIDELINES—
11 MS Admin Code pt. 6, 2024 Wasteload Allocation, Municipal Facility Guidelines 
VII.	SUMMARY AND BASIS OF DISCHARGE LIMITATIONS - The following limitations have been developed through empirical modeling:
	Parameter	VALUE	Basis	
Flow	0.1 MGD	Design	
BOD5	30 mg/l	WLA	
TSS	30 mg/l	Previous Permit	
Ammonia Nitrogen	Report	Previous Permit	
E. Coli	126 Col./100 mL	MS WQS	
Chlorine, Total Residual	1.0 mg/l	WLA	
pH	6.0 to 9.0 S.U.	MS WQS	
TSS, % Removal	65% 	Municipal Guidelines	
BOD5, % Removal	65% 	Municipal Guidelines	
Total Phosophorus	Report	Previous Permit	
Total Nitrogen	Report	Previous Permit	
WLA = Wasteload Allocation (Wasteload Allocation)
MS WQS = Mississippi Water Quality Standards