John C Stennis Center

NPDES permit MSP092488 · Minor NON-POTW · effective, expires 2031-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

EPA's file shows no filings for this permit in this window. That is a statement about the file, not about the facility.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MS permits in EPA's filings — check your permit).

Limits in force (39)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Cyanide, total [as CN]MO AVG <= .65 mg/L all year
001Cyanide, total [as CN]DAILY MX <= 1.2 mg/L all year
001Cyanide, total [as CN]MO AVG <= .0041 lb/d all year
001Cyanide, total [as CN]DAILY MX <= .0075 lb/d all year
001Nickel, total recoverableMO AVG <= .43 mg/L all year
001Nickel, total recoverableDAILY MX <= .69 mg/L all year
001Nickel, total recoverableMO AVG <= .0149 lb/d all year
001Nickel, total recoverableDAILY MX <= .0249 lb/d all year
001Silver total recoverableMO AVG <= .24 mg/L all year
001Silver total recoverableDAILY MX <= .43 mg/L all year
001Silver total recoverableMO AVG <= .0015 lb/d all year
001Silver total recoverableDAILY MX <= .0027 lb/d all year
001Zinc, total recoverableMO AVG <= 1.48 mg/L all year
001Zinc, total recoverableDAILY MX <= 2.61 mg/L all year
001Zinc, total recoverableMO AVG <= .0093 lb/d all year
001Zinc, total recoverableDAILY MX <= .0163 lb/d all year
001Cadmium, total recoverableMO AVG <= .07 mg/L all year
001Cadmium, total recoverableDAILY MX <= .11 mg/L all year
001Cadmium, total recoverableMO AVG <= .004 lb/d all year
001Cadmium, total recoverableDAILY MX <= .0007 lb/d all year
001Lead, total recoverableMO AVG <= .43 mg/L all year
001Lead, total recoverableDAILY MX <= .69 mg/L all year
001Lead, total recoverableMO AVG <= .0027 lb/d all year
001Lead, total recoverableDAILY MX <= .0043 lb/d all year
001Chromium, total recoverableMO AVG <= 1.71 mg/L all year
001Chromium, total recoverableDAILY MX <= 2.77 mg/L all year
001Chromium, total recoverableMO AVG <= .0107 lb/d all year
001Chromium, total recoverableDAILY MX <= .0173 lb/d all year
001Copper, total recoverableMO AVG <= 2.07 mg/L all year
001Copper, total recoverableDAILY MX <= 3.38 mg/L all year
001Copper, total recoverableMO AVG <= .0129 lb/d all year
001Copper, total recoverableDAILY MX <= .0211 lb/d all year
001Flow, in conduit or thru treatment plantMO AVG <= .00075 MGD all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101Total toxic organics [TTO] [40 CFR433]DAILY MX <= 2.13 mg/L all year
101Total toxic organics [TTO] [40 CFR433]DAILY MX <= .0133 lb/d all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states