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Structural Metals, Inc.

Blast Furnaces And Steel Mills, major discharger, Seguin, Texas. NPDES permit TX0083178, in force until Sep 11, 2031. Last 12 months: no values over a limit, 1 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.

Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 19 reports late

Limits in force (43)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximum≤ 105 deg Fall year001
Oxygen, dissolved [DO]monthly minimum≥ 4 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily average≤ 10 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 25 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily average≤ 30 lb/dall year001
Solids, total suspendeddaily maximum≤ 45 lb/dall year001
Oil & Greasedaily average≤ 10 lb/dall year001
Oil & Greasedaily maximum≤ 15 lb/dall year001
Chloride [as Cl]daily average≤ 430 lb/dall year001
Chloride [as Cl]daily maximum≤ 500 lb/dall year001
Sulfate, total [as SO4]daily average≤ 500 lb/dall year001
Sulfate, total [as SO4]daily maximum≤ 650 lb/dall year001
Cadmium, total [as Cd]daily maximum≤ .05 mg/Lall year001
Chromium, total [as Cr]daily average≤ .1 lb/dall year001
Chromium, total [as Cr]daily maximum≤ .2 lb/dall year001
Copper, total [as Cu]daily average≤ .2 lb/dall year001
Copper, total [as Cu]daily maximum≤ .5 lb/dall year001
Lead, total [as Pb]daily average≤ .165 lb/dall year001
Lead, total [as Pb]daily maximum≤ .495 lb/dall year001
Zinc, total [as Zn]daily average≤ .247 lb/dall year001
Zinc, total [as Zn]daily maximum≤ .74 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ .12 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ .18 MGDall year001
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year001
Chlorine, total residualmonthly maximum≤ 4 mg/Lall year001
E. colidaily average≤ 126 CFU/100mLall year001
E. colidaily maximum≤ 399 CFU/100mLall year001
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 pulexmonthly average 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 promelasmonthly average 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 pulexmonthly average minimumreport only (%)all yearTX1
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasmonthly average minimumreport only (%)all yearTX1
LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex48-hour minimumreport only (%)all yearTX1
LOAEC Lethal Static Renewal 48HR Acute Daphnia pulexmonthly average minimumreport only (%)all yearTX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelasmonthly average minimumreport only (%)all yearTX1
LC50 Pass/Fail Static 24Hr Acute D. Pulexsingle samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Pimephales promelassingle samplereport only (pass=0;fail=1)all yearTXA

How strict are these limits?

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

Same industry: the 13 Primary Metal Industries permits in Texas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TX0083178 · MCP: https://passage-data.com/mcp