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Gray And Ductile Iron Foundries, Lyons, Ohio. NPDES permit OH0138347, in force until Jan 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (4 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 14 reports late

Limits in force (30)

ParameterStatisticLimitMonthsOutfall
Flow ratemonthly averagereport only (gal/d)all year001
Flow ratedaily maximumreport only (gal/d)all year001
Oxygen, dissolved [DO]daily minimum≥ 5 mg/LMar, Jun, Aug, Dec001
pHdaily minimum≥ 6.5 SUMar, Jun, Aug, Dec001
pHdaily maximum≤ 9 SUMar, Jun, Aug, Dec001
Solids, total suspendedmonthly average≤ 12 mg/LMar, Jun, Aug, Dec001
Solids, total suspendedweekly maximum≤ 18 mg/LMar, Jun, Aug, Dec001
Solids, total suspendedmonthly average≤ .228 kg/dMar, Jun, Aug, Dec001
Solids, total suspendedweekly maximum≤ .341 kg/dMar, Jun, Aug, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LJun, Aug001
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LMar, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ 1.5 mg/LJun, Aug001
Nitrogen, ammonia total [as N]weekly maximum≤ 4.5 mg/LMar, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .019 kg/dJun, Aug001
Nitrogen, ammonia total [as N]monthly average≤ .0568 kg/dMar, Dec001
Nitrogen, ammonia total [as N]weekly maximum≤ .0284 kg/dJun, Aug001
Nitrogen, ammonia total [as N]weekly maximum≤ .0852 kg/dMar, Dec001
Turbidity [severity]monthly averagereport only (severity)all year001
Turbidity [severity]daily maximumreport only (severity)all year001
E. coli, MTEC-MFmonthly geometric mean≤ 126 MPN/100mLJun, Aug001
E. coli, MTEC-MFweekly geometric mean≤ 284 MPN/100mLJun, Aug001
Chlorine, total residualdaily maximum≤ .019 mg/LJun, Aug001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMar, Jun, Aug, Dec001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ 15 mg/LMar, Jun, Aug, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ .19 kg/dMar, Jun, Aug, Dec001
BOD, carbonaceous [5 day, 20 C]weekly maximum≤ .284 kg/dMar, Jun, Aug, Dec001
Biosolids weight indluding admixturesmonthly averagereport only (dry ton)Dec586
Biosolids weight indluding admixturesdaily maximumreport only (dry ton)Dec586
Sludge waste from secondary clarifiersmonthly averagereport only (gal)Dec588
Sludge waste from secondary clarifiersdaily maximumreport only (gal)Dec588

How strict are these limits?

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

Same industry: the 56 Primary Metal Industries permits in Ohio.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0138347 · MCP: https://passage-data.com/mcp