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Metal Technologies Auburn, LLC

Gray And Ductile Iron Foundries, Auburn, Indiana. NPDES permit IN0061263, in force until May 31, 2027. Last 12 months: over a limit once (last May 2026), 3 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (8 values), form AQ quarterly (10 values)
Renewal application due
Dec 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 4 required values missing, 2 of 18 reports late

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

Period endingParameterReportedLimit
May 2026pH, daily maximum9.99 SU≤ 9 SU

Limits in force (26)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Oil and grease, hexane extr methoddaily maximum≤ 5 mL/Lall year
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jun, Dec
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)Jun, Dec
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jun, Dec
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Jun, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun, Dec
Iron, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Iron, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Zinc, total recoverablemonthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Zinc, total recoverablemonthly averagereport only (mg/L)Mar, Jun, Sep, Dec
Zinc, total recoverabledaily maximum≤ .52 mg/LMar, Jun, Sep, Dec
Zinc, total recoverabledaily maximum≤ .52 mg/LMar, Jun, Sep, Dec
Lead, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Lead, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Copper, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Copper, total recoverabledaily maximumreport only (mg/L)Mar, Jun, Sep, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)Jun, Dec
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)Jun, Dec
Flow, totalmonthly totalreport only (Mgal/mo)all year

How strict are these limits?

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

Same industry: the 54 Primary Metal Industries permits in Indiana.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0061263 · MCP: https://passage-data.com/mcp