NATIONAL AEROMAUTICS & SPACE ADMINISTRATION- MICHOUD ASSEMBLY FACILITY

NPDES permit LA0052256 · Major FEDERAL · effective, expires 2031-03-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 122 forms filed late

Last period with anything received: 2026-07-31.

Reporting

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

Limits in force (144)

OutfallParameterStatisticLimitMonths
001Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
001pHINST MIN report only all year
001pHINST MAX report only all year
001Carbon, tot organic [TOC]DAILY MX report only all year
001Whole effluent toxicity - retest #248HR MIN report only all year
001Whole effluent toxicity - retest #2MO AV MN report only all year
001TrichloroethyleneMO AVG report only all year
001TrichloroethyleneDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Whole Effluent Toxicity - Retest #348HR MIN report only all year
001Whole Effluent Toxicity - Retest #3MO AV MN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)48HR MIN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)MO AV MN report only all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllina48HR MIN report only all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllinaMO AV MN report only all year
001NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)48HR MIN report only all year
001NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
001NOAEC Lethal Static Renewal 48HR Acute Menidia beryllina48HR MIN report only all year
001NOAEC Lethal Static Renewal 48HR Acute Menidia beryllinaMO AV MN report only all year
001Coef Of Var Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MAXIMUM report only all year
001Coef Of Var Static Renewal 48Hr Acute Menidia beryllinaMAXIMUM report only all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 8.5 SU all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
002Copper, total [as Cu]MO AVG report only all year
002Copper, total [as Cu]DAILY MX report only all year
002Lead, total [as Pb]MO AVG report only all year
002Lead, total [as Pb]DAILY MX report only all year
002Nickel, total [as Ni]MO AVG report only all year
002Nickel, total [as Ni]DAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Mercury, total [as Hg]MO AVG report only all year
002Mercury, total [as Hg]DAILY MX report only all year
003pHINST MIN >= 6 SU all year
003pHINST MAX <= 8.5 SU all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
003Copper, total [as Cu]MO AVG report only all year
003Copper, total [as Cu]DAILY MX report only all year
003Lead, total [as Pb]MO AVG report only all year
003Lead, total [as Pb]DAILY MX report only all year
003Nickel, total [as Ni]MO AVG report only all year
003Nickel, total [as Ni]DAILY MX report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Mercury, total [as Hg]MO AVG report only all year
003Mercury, total [as Hg]DAILY MX report only all year
004Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
004pHINST MIN report only all year
004pHINST MAX report only all year
004Carbon, tot organic [TOC]DAILY MX report only all year
004Whole effluent toxicity - retest #148HR MIN report only all year
004Whole effluent toxicity - retest #148HR MIN report only all year
004Whole effluent toxicity - retest #1MO AV MN report only all year
004Whole effluent toxicity - retest #1MO AV MN report only all year
004Whole effluent toxicity - retest #248HR MIN report only all year
004Whole effluent toxicity - retest #248HR MIN report only all year
004Whole effluent toxicity - retest #2MO AV MN report only all year
004Whole effluent toxicity - retest #2MO AV MN report only all year
004TrichloroethyleneMO AVG report only all year
004TrichloroethyleneDAILY MX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Whole Effluent Toxicity - Retest #348HR MIN report only all year
004Whole Effluent Toxicity - Retest #348HR MIN report only all year
004Whole Effluent Toxicity - Retest #3MO AV MN report only all year
004Whole Effluent Toxicity - Retest #3MO AV MN report only all year
004LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)48HR MIN report only all year
004LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)MO AV MN report only all year
004Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllina48HR MIN report only all year
004Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllinaMO AV MN report only all year
004NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)48HR MIN report only all year
004NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
004NOAEC Lethal Static Renewal 48HR Acute Menidia beryllina48HR MIN report only all year
004NOAEC Lethal Static Renewal 48HR Acute Menidia beryllinaMO AV MN report only all year
004Coef Of Var Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)MAXIMUM report only all year
004Coef Of Var Static Renewal 48Hr Acute Menidia beryllinaMAXIMUM report only all year
1001Oil & GreaseDAILY MX <= 15 mg/L all year
1001Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
1001Flow, in conduit or thru treatment plantMO AVG report only all year
1001Flow, in conduit or thru treatment plantDAILY MX report only all year
101Solids, total suspendedMO AVG <= 31 mg/L all year
101Solids, total suspendedDAILY MX <= 50 mg/L all year
101Oil & GreaseMO AVG <= 26 mg/L all year
101Oil & GreaseDAILY MX <= 52 mg/L all year
101Nitrogen, total [as N]MO AVG report only all year
101Nitrogen, total [as N]DAILY MX report only all year
101Nitrogen, nitrate total [as N]MO AVG report only all year
101Nitrogen, nitrate total [as N]DAILY MX report only all year
101Phosphorus, total [as P]MO AVG report only all year
101Phosphorus, total [as P]DAILY MX report only all year
101Cyanide, total [as CN]MO AVG <= .35 mg/L all year
101Cyanide, total [as CN]DAILY MX <= .84 mg/L all year
101Cadmium, total [as Cd]MO AVG <= .26 mg/L all year
101Cadmium, total [as Cd]DAILY MX <= .69 mg/L all year
101Chromium, total [as Cr]MO AVG <= .15 mg/L all year
101Chromium, total [as Cr]DAILY MX <= .3 mg/L all year
101Copper, total [as Cu]MO AVG <= 1.43 mg/L all year
101Copper, total [as Cu]DAILY MX <= 3.4 mg/L all year
101Lead, total [as Pb]MO AVG <= .43 mg/L all year
101Lead, total [as Pb]DAILY MX <= .69 mg/L all year
101Nickel, total [as Ni]MO AVG <= 2.38 mg/L all year
101Nickel, total [as Ni]DAILY MX <= 3.98 mg/L all year
101Silver, total [as Ag]MO AVG <= .24 mg/L all year
101Silver, total [as Ag]DAILY MX <= .43 mg/L all year
101Zinc, total [as Zn]MO AVG <= 1.48 mg/L all year
101Zinc, total [as Zn]DAILY MX <= 2.61 mg/L all year
101TrichloroethyleneMO AVG <= .1 mg/L all year
101TrichloroethyleneDAILY MX <= .15 mg/L 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
1101Oil & GreaseDAILY MX <= 15 mg/L all year
1101Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
1101Flow, in conduit or thru treatment plantMO AVG report only all year
1101Flow, in conduit or thru treatment plantDAILY MX report only all year
201Oil & GreaseDAILY MX <= 15 mg/L all year
201Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
201TrichloroethyleneMO AVG <= .032 mg/L all year
201TrichloroethyleneDAILY MX <= .05 mg/L all year
201Flow, in conduit or thru treatment plantMO AVG report only all year
201Flow, in conduit or thru treatment plantDAILY MX report only all year
301Oil & GreaseDAILY MX <= 15 mg/L all year
301Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
301TrichloroethyleneMO AVG <= .043 mg/L all year
301TrichloroethyleneDAILY MX <= .069 mg/L all year
301Flow, in conduit or thru treatment plantMO AVG report only all year
301Flow, in conduit or thru treatment plantDAILY MX report only all year
401Oil & GreaseDAILY MX <= 15 mg/L all year
401Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
401TrichloroethyleneMO AVG <= .691 mg/L all year
401TrichloroethyleneDAILY MX <= 1.287 mg/L all year
401Flow, in conduit or thru treatment plantMO AVG report only all year
401Flow, in conduit or thru treatment plantDAILY MX report only all year
501Oil & GreaseDAILY MX report only all year
501Carbon, tot organic [TOC]DAILY MX report only all year
501Flow, in conduit or thru treatment plantMO AVG report only all year
501Flow, in conduit or thru treatment plantDAILY MX report only all year
601Oil & GreaseDAILY MX report only all year
601Carbon, tot organic [TOC]DAILY MX report only all year
601Flow, in conduit or thru treatment plantMO AVG report only all year
601Flow, in conduit or thru treatment plantDAILY MX report only 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