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Industrial Inorganic Chemicals, major discharger, El Dorado, Arkansas. NPDES permit AR0001171, in force until Jun 30, 2029. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| November 2025 | pH, maximum | 9.3 SU | ≤ 9 SU |
| December 2025 | pH, maximum | 9.3 SU | ≤ 9 SU |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 35 mg/L | all year | 004 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 004 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 004 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 004 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 004 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Total purgeable halocarbons | daily maximum | ≤ .1 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 004 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 004 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Cyanide, total recoverable | monthly average | report only (ug/L) | all year | 004 |
| Cyanide, total recoverable | daily maximum | report only (ug/L) | all year | 004 |
| Temperature, water deg. fahrenheit | instantaneous maximum | ≤ 86 deg F | all year | 005 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 005 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 005 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 35 mg/L | all year | 005 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 005 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 005 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 005 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 005 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 005 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 005 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Total purgeable halocarbons | daily maximum | ≤ .1 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 005 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 005 |
| Mercury, total recoverable | monthly average minimum | report only (ug/L) | all year | 005 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 005 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 4 mg/L | May–Oct | 006 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 006 |
| pH | minimum | ≥ 6 SU | all year | 006 |
| pH | minimum | ≥ 6 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| pH | maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 006 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 006 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 006 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .5 mg/L | all year | 006 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .75 mg/L | all year | 006 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 006 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 006 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 35 mg/L | all year | 006 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 35 mg/L | all year | 006 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 006 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 006 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 006 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 006 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 006 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 006 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 006 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 006 |
| Selenium, total recoverable | monthly average | ≤ 5.58 ug/L | all year | 006 |
| Selenium, total recoverable | daily maximum | ≤ 11.2 ug/L | all year | 006 |
| Chromium, hexavalent [as Cr] | monthly average | ≤ 11.81 ug/L | all year | 006 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 23.7 ug/L | all year | 006 |
| Nickel, total recoverable | monthly average | ≤ 131.56 ug/L | all year | 006 |
| Nickel, total recoverable | daily maximum | ≤ 263.96 ug/L | all year | 006 |
| Silver total recoverable | monthly average | ≤ 1.33 ug/L | all year | 006 |
| Silver total recoverable | daily maximum | ≤ 2.68 ug/L | all year | 006 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Zinc, total recoverable | monthly average | ≤ 115.62 ug/L | all year | 006 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Zinc, total recoverable | daily maximum | ≤ 231.99 ug/L | all year | 006 |
| Cadmium, total recoverable | monthly average | ≤ 2.03 ug/L | all year | 006 |
| Cadmium, total recoverable | daily maximum | ≤ 4.08 ug/L | all year | 006 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Lead, total recoverable | monthly average | ≤ 3.8 ug/L | all year | 006 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Lead, total recoverable | daily maximum | ≤ 7.62 ug/L | all year | 006 |
| Chromium, total recoverable | monthly average | ≤ 364.32 ug/L | all year | 006 |
| Chromium, total recoverable | daily maximum | ≤ 730.99 ug/L | all year | 006 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Copper, total recoverable | monthly average | ≤ 12.2 ug/L | all year | 006 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Copper, total recoverable | daily maximum | ≤ 24.48 ug/L | all year | 006 |
| Total purgeable halocarbons | daily maximum | ≤ .1 mg/L | all year | 006 |
| Total purgeable halocarbons | daily maximum | ≤ .1 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 006 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 006 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 006 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 006 |
| Mercury, total recoverable | monthly average | report only (ug/L) | all year | 006 |
| Mercury, total recoverable | monthly average | ≤ .0134 ug/L | all year | 006 |
| Mercury, total recoverable | daily maximum | report only (ug/L) | all year | 006 |
| Mercury, total recoverable | daily maximum | ≤ .0269 ug/L | all year | 006 |
| Coliform, fecal general | 30-day geometric mean | ≤ 1000 #/100mL | all year | 006 |
| Coliform, fecal general | 7-day geometric mean | ≤ 2000 #/100mL | all year | 006 |
| Cyanide, total recoverable | monthly average | ≤ 5.8 ug/L | all year | 006 |
| Cyanide, total recoverable | daily maximum | ≤ 11.64 ug/L | all year | 006 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | all year | 006 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 23 mg/L | all year | 006 |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year | 010 |
| pH | minimum | ≥ 6 SU | all year | 010 |
| pH | maximum | ≤ 9 SU | all year | 010 |
| Solids, total suspended | monthly average | ≤ 750.6 lb/d | all year | 010 |
| Solids, total suspended | daily maximum | ≤ 1125.9 lb/d | all year | 010 |
| Oil & Grease | monthly average | ≤ 250.2 lb/d | all year | 010 |
| Oil & Grease | daily maximum | ≤ 375.3 lb/d | all year | 010 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 12.5 lb/d | all year | 010 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 18.7 lb/d | all year | 010 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 010 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 010 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 010 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 010 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 010 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 010 |
| Selenium, total recoverable | monthly average | ≤ .99 lb/d | all year | 010 |
| Selenium, total recoverable | daily maximum | ≤ 1.98 lb/d | all year | 010 |
| Nickel, total recoverable | monthly average | ≤ 21.35 lb/d | all year | 010 |
| Nickel, total recoverable | daily maximum | ≤ 42.83 lb/d | all year | 010 |
| Silver total recoverable | monthly average | ≤ .12 lb/d | all year | 010 |
| Silver total recoverable | daily maximum | ≤ .23 lb/d | all year | 010 |
| Zinc, total recoverable | monthly average | ≤ 11.03 lb/d | all year | 010 |
| Zinc, total recoverable | daily maximum | ≤ 22.13 lb/d | all year | 010 |
| Cadmium, total recoverable | monthly average | ≤ .33 lb/d | all year | 010 |
| Cadmium, total recoverable | daily maximum | ≤ .67 lb/d | all year | 010 |
| Lead, total recoverable | monthly average | ≤ .6 lb/d | all year | 010 |
| Lead, total recoverable | daily maximum | ≤ 1.2 lb/d | all year | 010 |
| Copper, total recoverable | monthly average | ≤ 1.23 lb/d | all year | 010 |
| Copper, total recoverable | daily maximum | ≤ 2.48 lb/d | all year | 010 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | ≤ 1.44 lb/d | all year | 010 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 2.9 lb/d | all year | 010 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 3 MGD | all year | 010 |
| Chromium III | monthly average | ≤ 59.27 lb/d | all year | 010 |
| Chromium III | daily maximum | ≤ 118.93 lb/d | all year | 010 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 010 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 010 |
| Mercury, total recoverable | daily maximum | < .19 ug/L | all year | 010 |
| Coliform, fecal general | 30-day geometric mean | report only (#/100mL) | all year | 010 |
| Coliform, fecal general | 7-day geometric mean | report only (#/100mL) | all year | 010 |
| Cyanide, total recoverable | monthly average | ≤ 1.03 lb/d | all year | 010 |
| Cyanide, total recoverable | daily maximum | ≤ 2.06 lb/d | all year | 010 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 383.33 lb/d | all year | 010 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 575 lb/d | all year | 010 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 3 MGD | all year | 06A |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX10 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX10 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX10 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX10 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX10 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX10 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX10 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX4 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX4 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX4 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX4 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX4 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX4 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX4 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX5 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX5 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX5 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX5 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX5 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX5 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| WET, sublethal retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| WET, sublethal retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Whole Effluent Toxicity - Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Whole Effluent Toxicity, Sub-Lethal Retest #3 | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX6 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX6 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX6 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX6 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX6 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX6 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX6 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX6 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX6 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX6 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX6 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX6 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX6 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Mercury, total recoverable, monthly average outfall 004 | 0.0134 ug/L | new | 0.016 ug/L (11 values) | 1.19× |
| Lead, total recoverable, daily maximum outfall 005 | 7.62 ug/L | new | 12 ug/L (9 values) | 1.57× |
| Lead, total recoverable, monthly average outfall 005 | 3.8 ug/L | new | 12 ug/L (9 values) | 3.16× |
| Zinc, total recoverable, monthly average outfall 005 | 115.62 ug/L | new | 150 ug/L (9 values) | 1.3× |
| Cyanide, total recoverable, daily maximum outfall 004 | 11.34 ug/L | new | 10 ug/L (11 values, 10 below detection) | — |
| Cyanide, total recoverable, monthly average outfall 004 | 5.8 ug/L | new | 10 ug/L (11 values, 10 below detection) | — |
| Lead, total recoverable, daily maximum outfall 004 | 7.62 ug/L | new | 3.6 ug/L (11 values) | 0.472× |
| Lead, total recoverable, monthly average outfall 004 | 3.8 ug/L | new | 3.6 ug/L (11 values) | 0.947× |
| Mercury, total recoverable, daily maximum outfall 004 | 0.0269 ug/L | new | 0.016 ug/L (11 values) | 0.595× |
| Copper, total recoverable, daily maximum outfall 005 | 24.48 ug/L | new | 11 ug/L (9 values) | 0.449× |
| Copper, total recoverable, monthly average outfall 005 | 12.2 ug/L | new | 11 ug/L (9 values) | 0.902× |
| Mercury, total recoverable, daily maximum outfall 005 | 0.0269 ug/L | new | 0.0099 ug/L (9 values) | 0.368× |
| Mercury, total recoverable, monthly average outfall 005 | 0.0134 ug/L | new | — | — |
| Zinc, total recoverable, daily maximum outfall 005 | 231.99 ug/L | new | 150 ug/L (9 values) | 0.647× |
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/AR0001171 · MCP: https://passage-data.com/mcp