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Lion Oil Company-El Dorado Ref

Petroleum Refining, major discharger, El Dorado, Arkansas. NPDES permit AR0000647 expired Feb 28, 2009; its limits still apply. Last 12 months: over a limit 2 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (58 values), outfall 002 form A monthly (8 values), outfall 003 form A monthly (8 values), outfall 004 form A monthly (8 values), outfall 005 form A monthly (32 values), outfall 006 form A monthly (40 values), and 4 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 10 of 104 reports late

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

Period endingOutfallParameterReportedLimitOver by
March 2026002pH, maximum10.7 SU≤ 9 SU—
April 2026010Mercury, total recoverable, daily maximum.29 ug/L< .2 ug/L45%

Limits in force (304)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitinstantaneous maximum≤ 86 deg Fall year001
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year001
Oxygen demand, chem. [high level] [COD]monthly average≤ 175 mg/Lall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 341 mg/Lall year001
Oxygen demand, chem. [high level] [COD]monthly average≤ 3891 lb/dall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 7598 lb/dall year001
pHminimum hourly average≥ 6 SUall year001
pHmaximum hourly average≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 20 mg/Lall year001
Solids, total suspendeddaily maximum≤ 32 mg/Lall year001
Solids, total suspendedmonthly average≤ 453 lb/dall year001
Solids, total suspendeddaily maximum≤ 709 lb/dall year001
Oil & Greasemonthly average≤ 7 mg/Lall year001
Oil & Greasedaily maximum≤ 14 mg/Lall year001
Oil & Greasemonthly average≤ 166 lb/dall year001
Oil & Greasedaily maximum≤ 316 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJun–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 9 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LJun–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 45 lb/dJun–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 200 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 89 lb/dJun–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 401 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
Sulfide, total [as S]monthly average≤ .09 mg/Lall year001
Sulfide, total [as S]daily maximum≤ .18 mg/Lall year001
Sulfide, total [as S]monthly average≤ 2 lb/dall year001
Sulfide, total [as S]daily maximum≤ 4 lb/dall year001
Sulfate, total [as SO4]monthly average≤ 68 mg/Lall year001
Sulfate, total [as SO4]monthly average≤ 2195 mg/Lall year001
Sulfate, total [as SO4]daily maximum≤ 102 mg/Lall year001
Sulfate, total [as SO4]daily maximum≤ 3292 mg/Lall year001
Sulfate, total [as SO4]monthly average≤ 1514 lb/dall year001
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year001
Sulfate, total [as SO4]daily maximum≤ 2271 lb/dall year001
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year001
Selenium, total recoverablemonthly average≤ 5.8 ug/Lall year001
Selenium, total recoverablemonthly average≤ 38.6 ug/Lall year001
Selenium, total recoverabledaily maximum≤ 11.65 ug/Lall year001
Selenium, total recoverabledaily maximumreport only (ug/L)all year001
Selenium, total recoverablemonthly average≤ .13 lb/dall year001
Selenium, total recoverablemonthly average≤ .581 lb/dall year001
Selenium, total recoverabledaily maximum≤ .26 lb/dall year001
Selenium, total recoverabledaily maximumreport only (lb/d)all year001
Chromium, hexavalent [as Cr]monthly average≤ .012 mg/Lall year001
Chromium, hexavalent [as Cr]daily maximum≤ .024 mg/Lall year001
Chromium, hexavalent [as Cr]monthly average≤ .27 lb/dall year001
Chromium, hexavalent [as Cr]daily maximum≤ .53 lb/dall year001
Chromium, total [as Cr]monthly average≤ .27 mg/Lall year001
Chromium, total [as Cr]daily maximum≤ .63 mg/Lall year001
Chromium, total [as Cr]monthly average≤ 6 lb/dall year001
Chromium, total [as Cr]daily maximum≤ 14 lb/dall year001
Zinc, total recoverablemonthly average≤ 118 ug/Lall year001
Zinc, total recoverablemonthly average≤ 926 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 237 ug/Lall year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverablemonthly average≤ 2.63 lb/dall year001
Zinc, total recoverablemonthly average≤ 14 lb/dall year001
Zinc, total recoverabledaily maximum≤ 5.28 lb/dall year001
Zinc, total recoverabledaily maximumreport only (lb/d)all year001
Phenolics, total recoverablemonthly average≤ .18 mg/Lall year001
Phenolics, total recoverabledaily maximum≤ .36 mg/Lall year001
Phenolics, total recoverablemonthly average≤ 4 lb/dall year001
Phenolics, total recoverabledaily maximum≤ 8 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Solids, total dissolvedmonthly average≤ 86 mg/Lall year001
Solids, total dissolvedmonthly average≤ 207 mg/Lall year001
Solids, total dissolvedmonthly average≤ 3817 mg/Lall year001
Solids, total dissolveddaily maximum≤ 129 mg/Lall year001
Solids, total dissolveddaily maximum≤ 310 mg/Lall year001
Solids, total dissolveddaily maximum≤ 5725 mg/Lall year001
Solids, total dissolvedmonthly average≤ 1915 lb/dall year001
Solids, total dissolvedmonthly average≤ 4596 lb/dall year001
Solids, total dissolvedmonthly averagereport only (lb/d)all year001
Solids, total dissolveddaily maximum≤ 2872 lb/dall year001
Solids, total dissolveddaily maximum≤ 6894 lb/dall year001
Solids, total dissolveddaily maximumreport only (lb/d)all year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJun–Sep001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 24 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 18 mg/LJun–Sep001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 43 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 223 lb/dJun–Sep001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 534 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 400 lb/dJun–Sep001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 958 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec001
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Oil & Greasemonthly average≤ 10 mg/Lall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Carbon, tot organic [TOC]monthly averagereport only (mg/L)all year002
Carbon, tot organic [TOC]daily maximum≤ 110 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Oil & Greasemonthly average≤ 10 mg/Lall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Carbon, tot organic [TOC]monthly averagereport only (mg/L)all year003
Carbon, tot organic [TOC]daily maximum≤ 110 mg/Lall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
pHminimum≥ 6 SUall year004
pHmaximum≤ 9 SUall year004
Oil & Greasemonthly average≤ 10 mg/Lall year004
Oil & Greasedaily maximum≤ 15 mg/Lall year004
Carbon, tot organic [TOC]monthly averagereport only (mg/L)all year004
Carbon, tot organic [TOC]daily maximum≤ 110 mg/Lall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year005
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year005
BOD, 5-day, 20 deg. Cmonthly average≤ 1555 lb/dall year005
BOD, 5-day, 20 deg. Cdaily maximum≤ 2827 lb/dall year005
Oxygen demand, chem. [high level] [COD]monthly averagereport only (mg/L)all year005
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year005
Oxygen demand, chem. [high level] [COD]monthly average≤ 10602 lb/dall year005
Oxygen demand, chem. [high level] [COD]daily maximum≤ 21205 lb/dall year005
pHminimum≥ 6 SUall year005
pHmaximum≤ 9 SUall year005
Solids, total suspendedmonthly averagereport only (mg/L)all year005
Solids, total suspendeddaily maximumreport only (mg/L)all year005
Solids, total suspendedmonthly average≤ 1272 lb/dall year005
Solids, total suspendeddaily maximum≤ 1979 lb/dall year005
Oil & Greasemonthly average≤ 10 mg/Lall year005
Oil & Greasedaily maximum≤ 15 mg/Lall year005
Oil & Greasemonthly average≤ 474 lb/dall year005
Oil & Greasedaily maximum≤ 919 lb/dall year005
Chromium, hexavalent [as Cr]monthly averagereport only (mg/L)all year005
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year005
Chromium, hexavalent [as Cr]monthly average≤ 1.6 lb/dall year005
Chromium, hexavalent [as Cr]daily maximum≤ 3.7 lb/dall year005
Chromium, total [as Cr]monthly averagereport only (mg/L)all year005
Chromium, total [as Cr]daily maximumreport only (mg/L)all year005
Chromium, total [as Cr]monthly average≤ 12.7 lb/dall year005
Chromium, total [as Cr]daily maximum≤ 35.3 lb/dall year005
Phenolics, total recoverablemonthly averagereport only (mg/L)all year005
Phenolics, total recoverabledaily maximumreport only (mg/L)all year005
Phenolics, total recoverablemonthly average≤ 9.9 lb/dall year005
Phenolics, total recoverabledaily maximum≤ 20.5 lb/dall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year006
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year006
BOD, 5-day, 20 deg. Cmonthly average≤ 3295 lb/dall year006
BOD, 5-day, 20 deg. Cdaily maximum≤ 5991 lb/dall year006
Oxygen demand, chem. [high level] [COD]monthly averagereport only (mg/L)all year006
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year006
Oxygen demand, chem. [high level] [COD]monthly average≤ 22466 lb/dall year006
Oxygen demand, chem. [high level] [COD]daily maximum≤ 44932 lb/dall year006
pHminimum≥ 6 SUall year006
pHmaximum≤ 9 SUall year006
Solids, total suspendedmonthly averagereport only (mg/L)all year006
Solids, total suspendeddaily maximumreport only (mg/L)all year006
Solids, total suspendedmonthly average≤ 2696 lb/dall year006
Solids, total suspendeddaily maximum≤ 4194 lb/dall year006
Oil & Greasemonthly average≤ 10 mg/Lall year006
Oil & Greasedaily maximum≤ 15 mg/Lall year006
Oil & Greasemonthly average≤ 1003 lb/dall year006
Oil & Greasedaily maximum≤ 1947 lb/dall year006
Chromium, hexavalent [as Cr]monthly averagereport only (mg/L)all year006
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year006
Chromium, hexavalent [as Cr]monthly average≤ 3.4 lb/dall year006
Chromium, hexavalent [as Cr]daily maximum≤ 7.8 lb/dall year006
Chromium, total [as Cr]monthly averagereport only (mg/L)all year006
Chromium, total [as Cr]daily maximumreport only (mg/L)all year006
Chromium, total [as Cr]monthly average≤ 27 lb/dall year006
Chromium, total [as Cr]daily maximum≤ 74.9 lb/dall year006
Zinc, total recoverablemonthly average≤ 117 ug/Lall year006
Zinc, total recoverablemonthly average≤ 926 ug/Lall year006
Zinc, total recoverabledaily maximum≤ 235 ug/Lall year006
Zinc, total recoverabledaily maximumreport only (ug/L)all year006
Zinc, total recoverablemonthly average≤ 4.2 lb/dall year006
Zinc, total recoverablemonthly average≤ 14 lb/dall year006
Zinc, total recoverabledaily maximum≤ 8.4 lb/dall year006
Zinc, total recoverabledaily maximumreport only (lb/d)all year006
Lead, total recoverablemonthly average≤ 3.9 ug/Lall year006
Lead, total recoverabledaily maximum≤ 7.8 ug/Lall year006
Lead, total recoverablemonthly average≤ .14 lb/dall year006
Lead, total recoverabledaily maximum≤ .28 lb/dall year006
Phenolics, total recoverablemonthly averagereport only (mg/L)all year006
Phenolics, total recoverabledaily maximumreport only (mg/L)all year006
Phenolics, total recoverablemonthly average≤ 21 lb/dall year006
Phenolics, total recoverabledaily maximum≤ 43.4 lb/dall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year007
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year007
BOD, 5-day, 20 deg. Cmonthly average≤ 3295 lb/dall year007
BOD, 5-day, 20 deg. Cdaily maximum≤ 5991 lb/dall year007
Oxygen demand, chem. [high level] [COD]monthly averagereport only (mg/L)all year007
Oxygen demand, chem. [high level] [COD]daily maximumreport only (mg/L)all year007
Oxygen demand, chem. [high level] [COD]monthly average≤ 22466 lb/dall year007
Oxygen demand, chem. [high level] [COD]daily maximum≤ 44932 lb/dall year007
pHminimum≥ 6 SUall year007
pHmaximum≤ 9 SUall year007
Solids, total suspendedmonthly averagereport only (mg/L)all year007
Solids, total suspendeddaily maximumreport only (mg/L)all year007
Solids, total suspendedmonthly average≤ 2696 lb/dall year007
Solids, total suspendeddaily maximum≤ 4194 lb/dall year007
Oil & Greasemonthly average≤ 10 mg/Lall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Oil & Greasemonthly average≤ 1003 lb/dall year007
Oil & Greasedaily maximum≤ 1947 lb/dall year007
Chromium, hexavalent [as Cr]monthly averagereport only (mg/L)all year007
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year007
Chromium, hexavalent [as Cr]monthly average≤ 3.4 lb/dall year007
Chromium, hexavalent [as Cr]daily maximum≤ 7.8 lb/dall year007
Chromium, total [as Cr]monthly averagereport only (mg/L)all year007
Chromium, total [as Cr]daily maximumreport only (mg/L)all year007
Chromium, total [as Cr]monthly average≤ 27 lb/dall year007
Chromium, total [as Cr]daily maximum≤ 74.9 lb/dall year007
Zinc, total recoverablemonthly average≤ 117 ug/Lall year007
Zinc, total recoverablemonthly average≤ 926 ug/Lall year007
Zinc, total recoverabledaily maximum≤ 235 ug/Lall year007
Zinc, total recoverabledaily maximumreport only (ug/L)all year007
Zinc, total recoverablemonthly average≤ 4.2 lb/dall year007
Zinc, total recoverablemonthly average≤ 14 lb/dall year007
Zinc, total recoverabledaily maximum≤ 8.4 lb/dall year007
Zinc, total recoverabledaily maximumreport only (lb/d)all year007
Lead, total recoverablemonthly average≤ 3.9 ug/Lall year007
Lead, total recoverabledaily maximum≤ 7.8 ug/Lall year007
Lead, total recoverablemonthly average≤ .14 lb/dall year007
Lead, total recoverabledaily maximum≤ .28 lb/dall year007
Phenolics, total recoverablemonthly averagereport only (mg/L)all year007
Phenolics, total recoverabledaily maximumreport only (mg/L)all year007
Phenolics, total recoverablemonthly average≤ 21 lb/dall year007
Phenolics, total recoverabledaily maximum≤ 43.4 lb/dall year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year007
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year010
Oxygen demand, chem. [high level] [COD]monthly average≤ 3891 lb/dall year010
Oxygen demand, chem. [high level] [COD]daily maximum≤ 7598 lb/dall year010
pHminimum≥ 6 SUall year010
pHmaximum≤ 9 SUall year010
Solids, total suspendedmonthly average≤ 453 lb/dall year010
Solids, total suspendeddaily maximum≤ 709 lb/dall year010
Oil & Greasemonthly average≤ 250.2 lb/dall year010
Oil & Greasedaily maximum≤ 375.3 lb/dall year010
Nitrogen, ammonia total [as N]monthly average≤ 200.2 lb/dall year010
Nitrogen, ammonia total [as N]daily maximum≤ 300.1 lb/dall year010
Phosphorus, total [as P]monthly averagereport only (mg/L)all year010
Phosphorus, total [as P]daily maximumreport only (mg/L)all year010
Sulfide, total [as S]monthly average≤ 2 lb/dall year010
Sulfide, total [as S]daily maximum≤ 4 lb/dall year010
Chloride [as Cl]monthly averagereport only (mg/L)all year010
Chloride [as Cl]daily maximumreport only (mg/L)all year010
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year010
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year010
Selenium, total recoverablemonthly average≤ .99 lb/dall year010
Selenium, total recoverabledaily maximum≤ 1.89 lb/dall year010
Chromium, total [as Cr]monthly average≤ 6 lb/dall year010
Chromium, total [as Cr]daily maximum≤ 14 lb/dall year010
Nickel, total recoverablemonthly average≤ 21.35 lb/dall year010
Nickel, total recoverabledaily maximum≤ 42.83 lb/dall year010
Silver total recoverablemonthly average≤ .12 lb/dall year010
Silver total recoverabledaily maximum≤ .23 lb/dall year010
Zinc, total recoverablemonthly average≤ 11.03 lb/dall year010
Zinc, total recoverabledaily maximum≤ 22.13 lb/dall year010
Cadmium, total recoverablemonthly average≤ .33 lb/dall year010
Cadmium, total recoverabledaily maximum≤ .67 lb/dall year010
Lead, total recoverablemonthly average≤ .6 lb/dall year010
Lead, total recoverabledaily maximum≤ 1.2 lb/dall year010
Copper, total recoverablemonthly average≤ 1.23 lb/dall year010
Copper, total recoverabledaily maximum≤ 2.48 lb/dall year010
Chromium, hexavalent dissolved [as Cr]monthly average≤ .56 lb/dall year010
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 1.26 lb/dall year010
Phenolics, total recoverablemonthly average≤ 4 lb/dall year010
Phenolics, total recoverabledaily maximum≤ 8 lb/dall year010
Flow, in conduit or thru treatment plantmonthly average≤ 3 MGDall year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
Chromium IIImonthly average≤ 59.27 lb/dall year010
Chromium IIIdaily maximum≤ 118.93 lb/dall year010
Solids, total dissolvedmonthly averagereport only (mg/L)all year010
Solids, total dissolveddaily maximumreport only (mg/L)all year010
Mercury, total recoverabledaily maximum< .2 ug/Lall year010
Coliform, fecal generalmonthly averagereport only (#/100mL)all year010
Coliform, fecal generaldaily maximumreport only (#/100mL)all year010
Cyanide, total recoverablemonthly average≤ 1.03 lb/dall year010
Cyanide, total recoverabledaily maximum≤ 2.06 lb/dall year010
BOD, carbonaceous [5 day, 20 C]monthly average≤ 537.9 lb/dall year010
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 806.8 lb/dall year010
Whole effluent toxicity7-day minimum≥ 96 %all yearTX1
Whole effluent toxicitydaily average minimum≥ 96 %all yearTX1
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX1
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX1
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX10
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX10
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX10
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX10
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX10
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX10
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX10
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX10
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX10
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX10

How strict are these limits?

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

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