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Nucor-Yamato Steel Company [Limited Partnership]

Blast Furnaces And Steel Mills, Armorel, Arkansas. NPDES permit AR0043117 expired Mar 31, 2026; its limits still apply. Last 12 months: no values over a limit, 6 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (21 values), outfall 001 form B monthly (21 values), outfall 002 form A monthly (20 values), outfall 002 form B monthly (12 values), outfall 003 form A monthly (14 values), outfall TX2 form Q quarterly (13 values), and 3 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 10 required values missing, 0 of 67 reports late

Limits in force (141)

ParameterStatisticLimitMonthsOutfall
Total production - massmonthly averagereport only (lb/d)all year001
Total production - massmonthly averagereport only (lb/d)all year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 272 lb/dall year001
Solids, total suspendedmonthly average≤ 340 lb/dall year001
Solids, total suspendeddaily maximum≤ 732.6 lb/dall year001
Solids, total suspendeddaily maximum≤ 915.8 lb/dall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasemonthly average≤ 131.8 lb/dall year001
Oil & Greasemonthly average≤ 131.8 lb/dall year001
Oil & Greasemonthly average≤ 169.5 lb/dall year001
Oil & Greasemonthly average≤ 211.9 lb/dall year001
Oil & Greasedaily maximum≤ 197.7 lb/dall year001
Oil & Greasedaily maximum≤ 197.7 lb/dall year001
Oil & Greasedaily maximum≤ 207.1 lb/dall year001
Oil & Greasedaily maximum≤ 258.9 lb/dall year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverablemonthly average≤ .9 lb/dall year001
Zinc, total recoverablemonthly average≤ 1.1 lb/dall year001
Zinc, total recoverabledaily maximum≤ 2.5 lb/dall year001
Zinc, total recoverabledaily maximum≤ 3.2 lb/dall year001
Lead, total recoverablemonthly averagereport only (ug/L)all year001
Lead, total recoverablemonthly averagereport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverablemonthly average≤ .6 lb/dall year001
Lead, total recoverablemonthly average≤ .7 lb/dall year001
Lead, total recoverabledaily maximum≤ 1.7 lb/dall year001
Lead, total recoverabledaily maximum≤ 2.1 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all 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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Oxygen demand, chem. [low level] [COD]monthly averagereport only (mg/L)all year002
Oxygen demand, chem. [low level] [COD]monthly averagereport only (mg/L)all year002
Oxygen demand, chem. [low level] [COD]daily maximumreport only (mg/L)all year002
Oxygen demand, chem. [low level] [COD]daily maximum≤ 75 mg/Lall year002
Oxygen demand, chem. [low level] [COD]monthly average≤ 950.8 lb/dall year002
Oxygen demand, chem. [low level] [COD]daily maximumreport only (lb/d)all year002
pHminimum≥ 6 SUall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly averagereport only (mg/L)all year002
Solids, total suspendedmonthly average≤ 200 mg/Lall year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Solids, total suspendedmonthly average≤ 3803 lb/dall year002
Solids, total suspendeddaily maximumreport only (lb/d)all year002
Oil & Greasemonthly averagereport only (mg/L)all year002
Oil & Greasemonthly average≤ 10 mg/Lall year002
Oil & Greasedaily maximumreport only (mg/L)all year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Oil & Greasemonthly average≤ 190.2 lb/dall year002
Oil & Greasedaily maximum≤ 285.2 lb/dall year002
Copper, total recoverablemonthly averagereport only (ug/L)all year002
Copper, total recoverablemonthly average≤ 29.5 ug/Lall year002
Copper, total recoverablemonthly averagereport only (ug/L)all year002
Copper, total recoverabledaily maximumreport only (ug/L)all year002
Copper, total recoverabledaily maximum≤ 59.1 ug/Lall year002
Copper, total recoverabledaily maximumreport only (ug/L)all year002
Copper, total recoverablemonthly average≤ .6 lb/dall year002
Copper, total recoverablemonthly average≤ .56 lb/dall year002
Copper, total recoverabledaily maximum≤ 1.1 lb/dall year002
Copper, total recoverabledaily maximum≤ 1.12 lb/dall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year003
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year003
BOD, 5-day, 20 deg. Cmonthly average≤ 62.6 lb/dall year003
BOD, 5-day, 20 deg. Cdaily maximum≤ 93.8 lb/dall year003
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Solids, total suspendedmonthly average≤ 90 mg/Lall year003
Solids, total suspendeddaily maximum≤ 135 mg/Lall year003
Solids, total suspendedmonthly average≤ 187.6 lb/dall year003
Solids, total suspendeddaily maximum≤ 281.5 lb/dall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Coliform, fecal general30-day geometric mean≤ 200 #/100mLMay–Sep003
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec003
Coliform, fecal general7-day geometric mean≤ 400 #/100mLMay–Sep003
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec003
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all yearTX1
WET, sublethal retest #148-hour maximumreport only (pass=0;fail=1)all yearTX1
WET, sublethal retest #148-hour minimumreport only (pass=0;fail=1)all yearTX1
WET, sublethal retest #248-hour minimumreport only (pass=0;fail=1)all yearTX1
WET, sublethal retest #248-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity - Retest #348-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity, Sub-Lethal Retest #348-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity, Sub-Lethal Retest #348-hour minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all yearTX1
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all yearTX1
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all yearTX1
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all yearTX1
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all yearTX1
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 48Hr Acute D. pulex48-hour minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 48Hr Acute D. pulex48-hour minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
WET, sublethal retest #17-day minimumreport only (pass=0;fail=1)all yearTX2
WET, sublethal retest #27-day minimumreport only (pass=0;fail=1)all yearTX2
Whole Effluent Toxicity, Sub-Lethal Retest #37-day minimumreport only (pass=0;fail=1)all yearTX2
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 100 %all yearTX2
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 80 %all yearTX2
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX2
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX2
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX2
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX2
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX2
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX2
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX2
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX2
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX2
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX2

How strict are these limits?

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

Same industry: the 10 Primary Metal Industries permits in Arkansas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0043117 · MCP: https://passage-data.com/mcp