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Tenaris USA

Steel Pipe And Tubes, major discharger, Ambridge, Pennsylvania. NPDES permit PA0006335, in force until Jan 31, 2027. Last 12 months: over a limit 4 times (last April 2026), 12 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 002 form Q quarterly (18 values), outfall 003 form Q quarterly (18 values), outfall 101 form A monthly (12 values), outfall 001 form S twice a year
Renewal application due
Aug 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 22 reports late

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

Period endingParameterReportedLimitOver by
December 2025Oil & Grease, daily maximum17.3 mg/L≤ 10 mg/L73%
February 2026Oil & Grease, daily maximum21 mg/L≤ 10 mg/L110%
March 2026Oil & Grease, daily maximum13.2 mg/L≤ 10 mg/L32%
April 2026Oil & Grease, daily maximum17.1 mg/L≤ 10 mg/L71%

Limits in force (54)

ParameterStatisticLimitMonthsOutfall
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Copper, total [as Cu]daily maximumreport only (mg/L)all year001
Iron, total [as Fe]daily maximumreport only (mg/L)all year001
Lead, total [as Pb]daily maximumreport only (mg/L)all year001
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Aluminum, total [as Al]daily maximumreport only (mg/L)all year001
Oxygen demand, chem. [high level] [COD]quarterly averagereport only (mg/L)all year002
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year002
pHinstantaneous minimum≥ 6 SUall year002
pHinstantaneous maximum≤ 9 SUall year002
Solids, total suspendedquarterly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 100 mg/Lall year002
Oil & Greasequarterly average≤ 15 mg/Lall year002
Oil & Greasedaily maximum≤ 30 mg/Lall year002
Copper, total [as Cu]quarterly averagereport only (mg/L)all year002
Copper, total [as Cu]daily maximumreport only (mg/L)all year002
Iron, total [as Fe]quarterly averagereport only (mg/L)all year002
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year002
Lead, total [as Pb]quarterly averagereport only (mg/L)all year002
Lead, total [as Pb]daily maximumreport only (mg/L)all year002
Zinc, total [as Zn]quarterly averagereport only (mg/L)all year002
Zinc, total [as Zn]daily maximumreport only (mg/L)all year002
Aluminum, total [as Al]quarterly averagereport only (mg/L)all year002
Aluminum, total [as Al]daily maximumreport only (mg/L)all year002
Oxygen demand, chem. [high level] [COD]quarterly averagereport only (mg/L)all year003
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year003
pHinstantaneous minimum≥ 6 SUall year003
pHinstantaneous maximum≤ 9 SUall year003
Solids, total suspendedquarterly average≤ 30 mg/Lall year003
Solids, total suspendeddaily maximum≤ 100 mg/Lall year003
Oil & Greasequarterly average≤ 15 mg/Lall year003
Oil & Greasedaily maximum≤ 30 mg/Lall year003
Copper, total [as Cu]quarterly averagereport only (mg/L)all year003
Copper, total [as Cu]daily maximumreport only (mg/L)all year003
Iron, total [as Fe]quarterly averagereport only (mg/L)all year003
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year003
Lead, total [as Pb]quarterly averagereport only (mg/L)all year003
Lead, total [as Pb]daily maximumreport only (mg/L)all year003
Zinc, total [as Zn]quarterly averagereport only (mg/L)all year003
Zinc, total [as Zn]daily maximumreport only (mg/L)all year003
Aluminum, total [as Al]quarterly averagereport only (mg/L)all year003
Aluminum, total [as Al]daily maximumreport only (mg/L)all year003
pHinstantaneous minimum≥ 6 SUall year101
pHinstantaneous maximum≤ 9 SUall year101
Solids, total suspendedmonthly average≤ 15 mg/Lall year101
Solids, total suspendeddaily maximum≤ 40 mg/Lall year101
Solids, total suspendedmonthly average≤ 186.48 lb/dall year101
Solids, total suspendeddaily maximum≤ 539.92 lb/dall year101
Oil & Greasedaily maximum≤ 10 mg/Lall year101
Oil & Greasedaily maximum≤ 134.98 lb/dall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Chlorine, total residualmonthly average≤ .5 mg/Lall year101
Chlorine, total residualdaily maximum≤ 1 mg/Lall year101

How strict are these limits?

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

Same industry: the 85 Primary Metal Industries permits in Pennsylvania.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PA0006335 · MCP: https://passage-data.com/mcp