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Industrial Inorganic Chemicals, El Dorado, Arkansas. NPDES permit AR0000680 expired Feb 28, 2013; its limits still apply. Last 12 months: over a limit 3 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| March 2026 | Lead, total recoverable, monthly average | 6.9 ug/L | ≤ 3.8 ug/L | 82% |
| April 2026 | Lead, total recoverable, daily maximum | 8.9 ug/L | ≤ 7.6 ug/L | 17% |
| April 2026 | Lead, total recoverable, monthly average | 6.02 ug/L | ≤ 3.8 ug/L | 58% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Carbon, tot organic [TOC] | monthly average | report only (mg/L) | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 60 mg/L | all year | 001 |
| Selenium, total recoverable | monthly average | ≤ 5.58 ug/L | all year | 001 |
| Selenium, total recoverable | monthly average | ≤ 5.58 ug/L | all year | 001 |
| Selenium, total recoverable | daily maximum | ≤ 11.2 ug/L | all year | 001 |
| Selenium, total recoverable | daily maximum | ≤ 11.2 ug/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 115.62 ug/L | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 115.62 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 231.99 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 231.99 ug/L | all year | 001 |
| Lead, total recoverable | monthly average | ≤ 3.8 ug/L | all year | 001 |
| Lead, total recoverable | monthly average | ≤ 3.8 ug/L | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 7.62 ug/L | all year | 001 |
| Lead, total recoverable | daily maximum | ≤ 7.6 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Carbon, tot organic [TOC] | monthly average | report only (mg/L) | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 60 mg/L | all year | 002 |
| Selenium, total recoverable | monthly average | ≤ 5.58 ug/L | all year | 002 |
| Selenium, total recoverable | monthly average | ≤ 5.58 ug/L | all year | 002 |
| Selenium, total recoverable | daily maximum | ≤ 11.2 ug/L | all year | 002 |
| Selenium, total recoverable | daily maximum | ≤ 11.2 ug/L | all year | 002 |
| Zinc, total recoverable | monthly average | ≤ 115.62 ug/L | all year | 002 |
| Zinc, total recoverable | monthly average | ≤ 115.62 ug/L | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ 231.99 ug/L | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ 231.99 ug/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 2 mg/L | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 003 |
| Solids, total suspended | monthly average | ≤ 15 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 22.5 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 22.5 mg/L | all year | 003 |
| Solids, total suspended | monthly average | ≤ 1.7 lb/d | all year | 003 |
| Solids, total suspended | monthly average | ≤ 1.7 lb/d | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 2.5 lb/d | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 2.5 lb/d | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 6.1 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5 mg/L | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 10 mg/L | Jan, Feb, Mar, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5 mg/L | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.1 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.5 mg/L | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Jan, Feb, Mar, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.5 mg/L | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .7 lb/d | Apr | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .6 lb/d | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.1 lb/d | Jan, Feb, Mar, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .6 lb/d | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .7 lb/d | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .8 lb/d | May–Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.7 lb/d | Jan, Feb, Mar, Nov, Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .8 lb/d | May–Oct | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | all year | 003 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | all year | 003 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | all year | 003 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 15 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 15 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1.1 lb/d | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 1.1 lb/d | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 1.7 lb/d | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 1.7 lb/d | all year | 003 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (pass=0;fail=1) | all year | TX1 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day average | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (pass=0;fail=1) | all year | TX1 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day average | report only (pass=0;fail=1) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (%) | all year | TX1 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day average | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (%) | all year | TX1 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day average | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day average | report only (%) | all year | TX1 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day average | report only (%) | all year | TX1 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (pass=0;fail=1) | all year | TX2 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day average | report only (pass=0;fail=1) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (pass=0;fail=1) | all year | TX2 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day average | report only (pass=0;fail=1) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (%) | all year | TX2 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day average | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day average | report only (%) | all year | TX2 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day average | report only (%) | all year | TX2 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day average | report only (%) | all year | TX2 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day average | report only (%) | all year | TX2 |
Cited limits by parameter: Arkansas's rules and the federal ones.
Same industry: the 15 Chemicals and Allied Products permits in Arkansas.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/AR0000680 · MCP: https://passage-data.com/mcp