PERMIT RATIONALE FOR REISSUANCE
Collinsville Water Association Inc, Collinsville Shopping Center and Subdivision
Lauderdale County
Collinsville, Mississippi
Water NPDES No. MS0050555
February 2026

I.	CLASSIFICATION – NPDES Commercial

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via individual septic tanks at each home (the businesses all flow into a large septic tank). Thence wastewater flows into a primary lagoon followed by 2 wetlands cells thence a chlorine contact chamber.  No increase in flow is proposed within the application. 

IV.	RECEIVING WATERS – Suqualena Creek. The receiving water is located within the Pascagoula River Basin, and is classified as Fish and Wildlife. Suqualena Creek does not appear on the updated State of Mississippi 303(d) list of impaired waterbodies. This discharge should not further impair water quality. 

V.	APPLICABLE GUIDELINES – 11 MS Admin Code Pt 6, Commercial Facility Guidelines (Technology), MS Water Quality Standards

VI.	SUMMARY OF LIMITATIONS –

Parameter			Flow						Basis
Flow				0.097 MGD					Design
BOD5				30 mg/l 					Technology
TSS				30 mg/l 					Technology
E. coli				126 Col./100 ml 				MS WQS	
Chlorine, Total Residual	0.1 – 1.0 SU					Technology
pH				6.0 – 9.0 SU					MS WQS