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Gray And Ductile Iron Foundries, major discharger, Tyler, Texas. NPDES permit TX0001465, in force until Dec 17, 2029. Last 12 months: over a limit 3 times (last August 2026), 6 required values missing, 8 of 49 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Sulfate, total [as SO4], daily average | 620 mg/L | ≤ 603 mg/L | 3% |
| June 2026 | Sulfate, total [as SO4], daily average | 609 mg/L | ≤ 603 mg/L | 1% |
| August 2026 | Sulfate, total [as SO4], daily average | 720 mg/L | ≤ 603 mg/L | 19% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | ≤ 104 deg F | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily average | ≤ 100 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 150 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9.5 SU | all year | 001 |
| Solids, total suspended | daily average | ≤ 44.4 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 66.8 lb/d | all year | 001 |
| Oil & Grease | daily average | ≤ 12.6 lb/d | all year | 001 |
| Oil & Grease | daily maximum | ≤ 18.6 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | daily average | ≤ 2.5 mg/L | all year | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ .0341 mg/L | all year | 001 |
| Sulfate, total [as SO4] | daily average | ≤ 603 mg/L | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | ≤ 1276 mg/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ .0024 mg/L | all year | 001 |
| Copper, total [as Cu] | daily average | ≤ .0192 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .0408 mg/L | all year | 001 |
| Lead, total [as Pb] | daily average | ≤ .0117 mg/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ .0248 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily average | ≤ .211 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .448 mg/L | all year | 001 |
| Aluminum, total [as Al] | daily average | ≤ .834 mg/L | all year | 001 |
| Aluminum, total [as Al] | daily maximum | ≤ 1.76 mg/L | all year | 001 |
| Phenols | daily average | ≤ .553 mg/L | all year | 001 |
| Phenols | daily maximum | ≤ 1.17 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .72 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 1.44 MGD | all year | 001 |
| E. coli | daily average | ≤ 126 CFU/100mL | all year | 001 |
| E. coli | daily maximum | ≤ 399 CFU/100mL | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 1500 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily average | ≤ 12 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 70 mg/L | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily average | ≤ 90 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 180 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | daily average | ≤ .06 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .144 MGD | all year | 002 |
| E. coli | daily average | ≤ 126 CFU/100mL | all year | 002 |
| E. coli | daily maximum | ≤ 399 CFU/100mL | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 400 mg/L | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ .4 mg/L | all year | 003 |
| Lead, total [as Pb] | daily maximum | ≤ 1.5 mg/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ 3 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 400 mg/L | all year | 004 |
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | ≤ .4 mg/L | all year | 004 |
| Lead, total [as Pb] | daily maximum | ≤ 1.5 mg/L | all year | 004 |
| Zinc, total [as Zn] | daily maximum | ≤ 3 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | daily average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #1 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole Effluent Toxicity [WET] - C. dubia | 7-day minimum | ≥ 64 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - C. dubia | monthly average minimum | ≥ 64 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - P. promelas | 7-day minimum | ≥ 64 % | all year | TX1 |
| Whole Effluent Toxicity [WET] - P. promelas | monthly average minimum | ≥ 64 % | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | monthly average minimum | report only (pass=0;fail=1) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX1 |
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | monthly average minimum | report only (%) | all year | TX1 |
| Whole effluent toxicity - retest #1 | single sample | report only (pass=0;fail=1) | all year | TXA |
| Whole effluent toxicity - retest #2 | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | single sample | report only (pass=0;fail=1) | all year | TXA |
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | single sample | report only (pass=0;fail=1) | all year | TXA |
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/TX0001465 · MCP: https://passage-data.com/mcp