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Arconic US LLC

Aluminum Sheet, Plate, And Foil, major discharger, Alcoa, Tennessee. NPDES permit TN0067199, in force until Dec 31, 2027. Last 12 months: over a limit 6 times (last August 2026), 8 of 116 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (29 values), outfall 007 form G monthly (16 values), outfall 01A form 0 monthly (18 values), outfall 01A form P monthly (18 values), outfall 01A form Q monthly (18 values), outfall 01A form R monthly (18 values), and 12 more forms
Renewal application due
Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 116 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
November 2025007Polychlorinated biphenyls [PCBs], daily maximum.000032 mg/L≤ .0000007 mg/L4471%
November 2025007Polychlorinated biphenyls [PCBs], monthly average.000032 mg/L≤ .000001 mg/L3100%
December 2025007Polychlorinated biphenyls [PCBs], daily maximum.000037 mg/L≤ .0000007 mg/L5186%
December 2025007Polychlorinated biphenyls [PCBs], monthly average.000037 mg/L≤ .000001 mg/L3600%
August 2026001BOD, carbonaceous [5 day, 20 C], daily maximum22.1 mg/L≤ 20 mg/L11%
August 2026001BOD, carbonaceous [5 day, 20 C], monthly average11.3 mg/L≤ 10 mg/L13%

Limits in force (275)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily maximum≤ 40 mg/Lall year001
Oil and grease, hexane extr methodmonthly average≤ 10 mg/Lall year001
Oil and grease, hexane extr methoddaily maximum≤ 15 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ .74 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 1.48 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Cyanide, total [as CN]monthly averagereport only (mg/L)all year001
Cyanide, total [as CN]daily maximumreport only (mg/L)all year001
Cyanide, free [amenable to chlorination]monthly average≤ .0048 mg/Lall year001
Cyanide, free [amenable to chlorination]daily maximum≤ .021 mg/Lall year001
Chromium, hexavalent [as Cr]monthly average≤ .01 mg/Lall year001
Chromium, hexavalent [as Cr]daily maximum≤ .015 mg/Lall year001
Chromium, trivalent [as Cr]monthly average≤ .67 mg/Lall year001
Chromium, trivalent [as Cr]daily maximum≤ 5.2 mg/Lall year001
Chromium, total [as Cr]monthly averagereport only (mg/L)all year001
Chromium, total [as Cr]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]monthly average≤ .76 mg/Lall year001
Zinc, total [as Zn]daily maximum≤ .76 mg/Lall year001
Aluminum, total [as Al]daily maximum≤ 3.9 mg/Lall year001
Polychlorinated biphenyls [PCBs]monthly average≤ .00000064 mg/Lall year001
Polychlorinated biphenyls [PCBs]daily maximum≤ .00000128 mg/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .019 mg/Lall year001
Chlorine, total residualdaily maximum≤ .011 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/LMay–Oct001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesminimum≥ 100 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesminimum≥ 100 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesminimum≥ 100 %all year001
pHminimum≥ 6 SUall year007
pHmaximum≤ 9 SUall year007
Oil and grease, hexane extr methodmonthly average≤ 10 mg/Lall year007
Oil and grease, hexane extr methoddaily maximum≤ 15 mg/Lall year007
Nitrogen, ammonia total [as N]monthly average≤ .74 mg/LMay–Oct007
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LJan, Feb, Mar, Apr, Nov, Dec007
Nitrogen, ammonia total [as N]daily maximum≤ 1.48 mg/LMay–Oct007
Nitrogen, ammonia total [as N]daily maximum≤ 2.4 mg/LJan, Feb, Mar, Apr, Nov, Dec007
Cyanide, total [as CN]monthly averagereport only (mg/L)all year007
Cyanide, total [as CN]daily maximumreport only (mg/L)all year007
Cyanide, free [amenable to chlorination]monthly average≤ .005 mg/Lall year007
Cyanide, free [amenable to chlorination]daily maximum≤ .022 mg/Lall year007
Polychlorinated biphenyls [PCBs]monthly average≤ .000001 mg/Lall year007
Polychlorinated biphenyls [PCBs]daily maximum≤ .0000007 mg/Lall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Chlorine, total residualmonthly average≤ .011 mg/Lall year007
Chlorine, total residualdaily maximum≤ .019 mg/Lall year007
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year007
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year007
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year007
IC25 Static Renewal 7 Day Chronic Pimephalesminimum≥ 100 %all year007
IC25 Static Renewal 7 Day Chronic Pimephalesminimum≥ 100 %all year007
IC25 Static Renewal 7 Day Chronic Pimephalesminimum≥ 100 %all year007
pHminimum≥ 6 SUall year01A
pHminimum≥ 6 SUall year01A
pHminimum≥ 6 SUall year01A
pHminimum≥ 6 SUall year01A
pHminimum≥ 6 SUall year01A
pHminimum≥ 6 SUall year01A
pHmaximum≤ 10 SUall year01A
pHmaximum≤ 10 SUall year01A
pHmaximum≤ 10 SUall year01A
pHmaximum≤ 10 SUall year01A
pHmaximum≤ 10 SUall year01A
pHmaximum≤ 10 SUall year01A
Solids, total suspendedmonthly average≤ 17.1 lb/dall year01A
Solids, total suspendedmonthly average≤ 11.9 lb/dall year01A
Solids, total suspendedmonthly average≤ 32.7 lb/dall year01A
Solids, total suspendedmonthly average≤ 22.3 lb/dall year01A
Solids, total suspendedmonthly average≤ 27.5 lb/dall year01A
Solids, total suspendedmonthly average≤ 37.8 lb/dall year01A
Solids, total suspendeddaily maximum≤ 36 lb/dall year01A
Solids, total suspendeddaily maximum≤ 25.1 lb/dall year01A
Solids, total suspendeddaily maximum≤ 68.7 lb/dall year01A
Solids, total suspendeddaily maximum≤ 46.9 lb/dall year01A
Solids, total suspendeddaily maximum≤ 57.8 lb/dall year01A
Solids, total suspendeddaily maximum≤ 79.6 lb/dall year01A
Oil and grease, hexane extr methodmonthly average≤ 10.5 lb/dall year01A
Oil and grease, hexane extr methodmonthly average≤ 7.3 lb/dall year01A
Oil and grease, hexane extr methodmonthly average≤ 20.1 lb/dall year01A
Oil and grease, hexane extr methodmonthly average≤ 13.7 lb/dall year01A
Oil and grease, hexane extr methodmonthly average≤ 16.9 lb/dall year01A
Oil and grease, hexane extr methodmonthly average≤ 23.3 lb/dall year01A
Oil and grease, hexane extr methoddaily maximum≤ 17.5 lb/dall year01A
Oil and grease, hexane extr methoddaily maximum≤ 12.2 lb/dall year01A
Oil and grease, hexane extr methoddaily maximum≤ 33.5 lb/dall year01A
Oil and grease, hexane extr methoddaily maximum≤ 22.9 lb/dall year01A
Oil and grease, hexane extr methoddaily maximum≤ 28.2 lb/dall year01A
Oil and grease, hexane extr methoddaily maximum≤ 38.8 lb/dall year01A
Cyanide, total [as CN]monthly average≤ .11 lb/dall year01A
Cyanide, total [as CN]monthly average≤ .07 lb/dall year01A
Cyanide, total [as CN]monthly average≤ .2 lb/dall year01A
Cyanide, total [as CN]monthly average≤ .14 lb/dall year01A
Cyanide, total [as CN]monthly average≤ .17 lb/dall year01A
Cyanide, total [as CN]monthly average≤ .23 lb/dall year01A
Cyanide, total [as CN]daily maximum≤ .26 lb/dall year01A
Cyanide, total [as CN]daily maximum≤ .18 lb/dall year01A
Cyanide, total [as CN]daily maximum≤ .49 lb/dall year01A
Cyanide, total [as CN]daily maximum≤ .34 lb/dall year01A
Cyanide, total [as CN]daily maximum≤ .41 lb/dall year01A
Cyanide, total [as CN]daily maximum≤ .57 lb/dall year01A
Chromium, total [as Cr]monthly average≤ .16 lb/dall year01A
Chromium, total [as Cr]monthly average≤ .11 lb/dall year01A
Chromium, total [as Cr]monthly average≤ .3 lb/dall year01A
Chromium, total [as Cr]monthly average≤ .21 lb/dall year01A
Chromium, total [as Cr]monthly average≤ .25 lb/dall year01A
Chromium, total [as Cr]monthly average≤ .35 lb/dall year01A
Chromium, total [as Cr]daily maximum≤ .39 lb/dall year01A
Chromium, total [as Cr]daily maximum≤ .27 lb/dall year01A
Chromium, total [as Cr]daily maximum≤ .74 lb/dall year01A
Chromium, total [as Cr]daily maximum≤ .51 lb/dall year01A
Chromium, total [as Cr]daily maximum≤ .63 lb/dall year01A
Chromium, total [as Cr]daily maximum≤ .86 lb/dall year01A
Zinc, total [as Zn]monthly average≤ .53 lb/dall year01A
Zinc, total [as Zn]monthly average≤ .37 lb/dall year01A
Zinc, total [as Zn]monthly average≤ 1.02 lb/dall year01A
Zinc, total [as Zn]monthly average≤ .7 lb/dall year01A
Zinc, total [as Zn]monthly average≤ .86 lb/dall year01A
Zinc, total [as Zn]monthly average≤ 1.18 lb/dall year01A
Zinc, total [as Zn]daily maximum≤ 1.28 lb/dall year01A
Zinc, total [as Zn]daily maximum≤ .89 lb/dall year01A
Zinc, total [as Zn]daily maximum≤ 2.44 lb/dall year01A
Zinc, total [as Zn]daily maximum≤ 1.67 lb/dall year01A
Zinc, total [as Zn]daily maximum≤ 2.06 lb/dall year01A
Zinc, total [as Zn]daily maximum≤ 2.83 lb/dall year01A
Aluminum, total [as Al]monthly average≤ 2.81 lb/dall year01A
Aluminum, total [as Al]monthly average≤ 1.96 lb/dall year01A
Aluminum, total [as Al]monthly average≤ 5.37 lb/dall year01A
Aluminum, total [as Al]monthly average≤ 3.66 lb/dall year01A
Aluminum, total [as Al]monthly average≤ 4.52 lb/dall year01A
Aluminum, total [as Al]monthly average≤ 6.22 lb/dall year01A
Aluminum, total [as Al]daily maximum≤ 5.64 lb/dall year01A
Aluminum, total [as Al]daily maximum≤ 3.93 lb/dall year01A
Aluminum, total [as Al]daily maximum≤ 10.77 lb/dall year01A
Aluminum, total [as Al]daily maximum≤ 7.35 lb/dall year01A
Aluminum, total [as Al]daily maximum≤ 9.06 lb/dall year01A
Aluminum, total [as Al]daily maximum≤ 12.48 lb/dall year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01A
Flowmonthly averagereport only (MGD)all year01A
Flowmonthly averagereport only (MGD)all year01A
Flowmonthly averagereport only (MGD)all year01A
Flowmonthly averagereport only (MGD)all year01A
Flowmonthly averagereport only (MGD)all year01A
Flowmonthly averagereport only (MGD)all year01A
Flowdaily maximumreport only (MGD)all year01A
Flowdaily maximumreport only (MGD)all year01A
Flowdaily maximumreport only (MGD)all year01A
Flowdaily maximumreport only (MGD)all year01A
Flowdaily maximumreport only (MGD)all year01A
Flowdaily maximumreport only (MGD)all year01A
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year01E
pHminimumreport only (SU)all year01E
pHmaximumreport only (SU)all year01E
Solids, total suspendeddaily maximumreport only (mg/L)all year01E
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all year01E
Magnesium, total [as Mg]daily maximumreport only (mg/L)all year01E
Copper, total [as Cu]daily maximumreport only (mg/L)all year01E
Iron, total [as Fe]daily maximumreport only (mg/L)all year01E
Aluminum, total [as Al]daily maximumreport only (mg/L)all year01E
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all year01E
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01E
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01E
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all year01E
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year01N
pHminimumreport only (SU)all year01N
pHmaximumreport only (SU)all year01N
Solids, total suspendeddaily maximumreport only (mg/L)all year01N
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all year01N
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year01N
Magnesium, total [as Mg]daily maximumreport only (mg/L)all year01N
Iron, total [as Fe]daily maximumreport only (mg/L)all year01N
Aluminum, total [as Al]daily maximumreport only (mg/L)all year01N
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all year01N
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01N
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01N
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all year01N
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year01S
pHminimumreport only (SU)all year01S
pHmaximumreport only (SU)all year01S
Solids, total suspendeddaily maximumreport only (mg/L)all year01S
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all year01S
Magnesium, total [as Mg]daily maximumreport only (mg/L)all year01S
Iron, total [as Fe]daily maximumreport only (mg/L)all year01S
Aluminum, total [as Al]daily maximumreport only (mg/L)all year01S
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all year01S
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year01S
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year01S
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all year01S
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearN01
pHminimumreport only (SU)all yearN01
pHmaximumreport only (SU)all yearN01
Solids, total suspendeddaily maximumreport only (mg/L)all yearN01
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all yearN01
Magnesium, total [as Mg]daily maximumreport only (mg/L)all yearN01
Iron, total [as Fe]daily maximumreport only (mg/L)all yearN01
Aluminum, total [as Al]daily maximumreport only (mg/L)all yearN01
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all yearN01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearN01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearN01
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all yearN01
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearN05
pHminimumreport only (SU)all yearN05
pHmaximumreport only (SU)all yearN05
Solids, total suspendeddaily maximumreport only (mg/L)all yearN05
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all yearN05
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearN05
Magnesium, total [as Mg]daily maximumreport only (mg/L)all yearN05
Iron, total [as Fe]daily maximumreport only (mg/L)all yearN05
Aluminum, total [as Al]daily maximumreport only (mg/L)all yearN05
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all yearN05
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearN05
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearN05
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all yearN05
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearN06
pHminimumreport only (SU)all yearN06
pHmaximumreport only (SU)all yearN06
Solids, total suspendeddaily maximumreport only (mg/L)all yearN06
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all yearN06
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearN06
Magnesium, total [as Mg]daily maximumreport only (mg/L)all yearN06
Iron, total [as Fe]daily maximumreport only (mg/L)all yearN06
Aluminum, total [as Al]daily maximumreport only (mg/L)all yearN06
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all yearN06
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearN06
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearN06
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all yearN06
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearN10
pHminimumreport only (SU)all yearN10
pHmaximumreport only (SU)all yearN10
Solids, total suspendeddaily maximumreport only (mg/L)all yearN10
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all yearN10
Magnesium, total [as Mg]daily maximumreport only (mg/L)all yearN10
Iron, total [as Fe]daily maximumreport only (mg/L)all yearN10
Zinc, total [as Zn]daily maximumreport only (mg/L)all yearN10
Aluminum, total [as Al]daily maximumreport only (mg/L)all yearN10
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all yearN10
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearN10
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearN10
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all yearN10
pHmaximumreport only (SU)all yearSW1
Solids, total suspendeddaily maximumreport only (mg/L)all yearSW1
Oil and grease, hexane extr methoddaily maximumreport only (mg/L)all yearSW1
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearSW1
Cyanide, total [as CN]daily maximumreport only (mg/L)all yearSW1
Magnesium, total [as Mg]daily maximumreport only (mg/L)all yearSW1
Chromium, total [as Cr]daily maximumreport only (mg/L)all yearSW1
Copper, total [as Cu]daily maximumreport only (mg/L)all yearSW1
Zinc, total [as Zn]daily maximumreport only (mg/L)all yearSW1
Aluminum, total [as Al]daily maximumreport only (mg/L)all yearSW1
Polychlorinated biphenyls [PCBs]daily maximumreport only (mg/L)all yearSW1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearSW1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearSW1
Chlorine, total residualdaily maximumreport only (mg/L)all yearSW1
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all yearSW1

How strict are these limits?

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

Same industry: the 12 Primary Metal Industries permits in Tennessee.

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