PERMIT RATIONALE FOR REISSUANCE
Collinsville Water Association Inc.
Lauderdale County
Collinsville, Mississippi
Water NPDES No. MS0062618
February 2026

I.	CLASSIFICATION – NPDES Industrial

II.	DESCRIPTION OF WASTEWATER – Treated, filtered, industrial backwash water

III.	DESCRIPTION OF WASTEWATER TREATMENT – Filtered backwash is discharged into an conventional lagoon for settling and then land applied by means of overland flow.  The effluent is collected and discharged.

IV.	RECEIVING WATERS – An unnamed tributary then Gin Creek.  This waterbody does not appear on the updated 2020 State of Mississippi Section 303(d) List of Impaired Waterbodies.  This waterbody is located in the Pascagoula River basin and is classified as Fish and Wildlife.  One discharge to surface waters is described within the application with no increase in flow proposed. The discharge from this facility should not further impair water quality.

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

VI.	SUMMARY OF LIMITATIONS –

Parameter			Flow				Basis
Chlorine, Total Residual	0.011 mg/L			Technology 
Flow				Report, MGD			Design
Iron				1.0 mg/L			MS WQS
TSS				30 mg/L			Technology
pH				6.0 – 9.0 SU			MS WQS