Mdot, Hwy 78 Welcome Center, Itawamba — NPDES permit MS0043389: limits, due date and EPA's record

Transportation Services, Tremont, Mississippi. NPDES permit MS0043389, in force until Apr 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (22)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	minimum	report only (mg/L)	all year
Oxygen, dissolved [DO]	maximum	report only (mg/L)	all year
BOD, 5-day, 20 deg. C	maximum monthly average	≤ 30 mg/L	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 45 mg/L	all year
BOD, 5-day, 20 deg. C	maximum monthly average	≤ 3.75 lb/d	all year
BOD, 5-day, 20 deg. C	daily maximum	≤ 5.63 lb/d	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
pH	minimum	report only (SU)	all year
pH	maximum	report only (SU)	all year
Solids, total suspended	maximum monthly average	≤ 30 mg/L	all year
Solids, total suspended	maximum weekly average	≤ 45 mg/L	all year
Solids, total suspended	maximum monthly average	≤ 3.75 lb/d	all year
Solids, total suspended	daily maximum	≤ 5.63 lb/d	all year
Flow, in conduit or thru treatment plant	maximum monthly average	≤ .015 MGD	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	minimum	≥ .1 mg/L	all year
Chlorine, total residual	maximum	≤ 1 mg/L	all year
E. coli	maximum monthly average	≤ 126 #/100mL	all year
E. coli	daily maximum	≤ 410 #/100mL	all year
Sludge settleability 30 minute	minimum	report only (mL/L)	all year
Sludge settleability 30 minute	maximum	report only (mL/L)	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/MS0043389 · MCP: https://passage-data.com/mcp