PERMIT RATIONALE FOR REISSUANCE
Toomsuba Water Systems Inc., Plant Number 2
Lauderdale County
Toomsuba, Mississippi
Water NPDES No. MS0062529
August 21, 2024

I.	CLASSIFICATION – NPDES Industrial

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

III.	DESCRIPTION OF WASTEWATER TREATMENT – The wastewater is filtered backwash from a filter system used to treat potable water.

IV.	RECEIVING WATERS – Unnamed ditch into Possum Creek. Possum Creek does not appear on updated 2018 Section 303(d) List of Impaired Water Bodies. Possum Creek is located in the Tombigbee River Drainage Basin and is classified as Fish and Wildlife. This facility is not listed on a Total Maximum Daily Load (TMDL) and no increase in flow is proposed within the application.

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