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John C Stennis Center

Space Research And Technology, Stennis Space Center, Mississippi. NPDES permit MSP092488, in force until Jul 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (2 values), outfall 101 form A monthly (37 values), outfall 101 form S twice a year
Last report on file
August 2026

Limits in force (41)

ParameterStatisticLimitMonthsOutfall
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
pHminimum≥ 6 SUall year101
pHmaximum≤ 9 SUall year101
Cyanide, total [as CN]monthly average≤ .65 mg/Lall year101
Cyanide, total [as CN]daily maximum≤ 1.2 mg/Lall year101
Cyanide, total [as CN]monthly average≤ .0041 lb/dall year101
Cyanide, total [as CN]daily maximum≤ .0075 lb/dall year101
Nickel, total recoverablemonthly average≤ 2.38 mg/Lall year101
Nickel, total recoverabledaily maximum≤ 3.98 mg/Lall year101
Nickel, total recoverablemonthly average≤ .0149 lb/dall year101
Nickel, total recoverabledaily maximum≤ .0249 lb/dall year101
Silver total recoverablemonthly average≤ .24 mg/Lall year101
Silver total recoverabledaily maximum≤ .43 mg/Lall year101
Silver total recoverablemonthly average≤ .0015 lb/dall year101
Silver total recoverabledaily maximum≤ .0027 lb/dall year101
Zinc, total recoverablemonthly average≤ 1.48 mg/Lall year101
Zinc, total recoverabledaily maximum≤ 2.61 mg/Lall year101
Zinc, total recoverablemonthly average≤ .0093 lb/dall year101
Zinc, total recoverabledaily maximum≤ .0163 lb/dall year101
Cadmium, total recoverablemonthly average≤ .07 mg/Lall year101
Cadmium, total recoverabledaily maximum≤ .11 mg/Lall year101
Cadmium, total recoverablemonthly average≤ .004 lb/dall year101
Cadmium, total recoverabledaily maximum≤ .0007 lb/dall year101
Lead, total recoverablemonthly average≤ .43 mg/Lall year101
Lead, total recoverabledaily maximum≤ .69 mg/Lall year101
Lead, total recoverablemonthly average≤ .0027 lb/dall year101
Lead, total recoverabledaily maximum≤ .0043 lb/dall year101
Chromium, total recoverablemonthly average≤ 1.71 mg/Lall year101
Chromium, total recoverabledaily maximum≤ 2.77 mg/Lall year101
Chromium, total recoverablemonthly average≤ .0107 lb/dall year101
Chromium, total recoverabledaily maximum≤ .0173 lb/dall year101
Copper, total recoverablemonthly average≤ 2.07 mg/Lall year101
Copper, total recoverabledaily maximum≤ 3.38 mg/Lall year101
Copper, total recoverablemonthly average≤ .0129 lb/dall year101
Copper, total recoverabledaily maximum≤ .0211 lb/dall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantmonthly average≤ .00075 MGDall year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Total toxic organics [TTO] [40 CFR433]daily maximum≤ 2.13 mg/Lall year101
Total toxic organics [TTO] [40 CFR433]daily maximum≤ .0133 lb/dall year101

Cited limits by parameter: Mississippi's rules and the federal ones.

Same industry: the 9 Administration of Economic Programs permits in Mississippi.

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Your permit document is the final word. As JSON: /api/v1/permits/MSP092488 · MCP: https://passage-data.com/mcp