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Desoto Gathering Company, LLC

Oil And Gas Field Services, Sunnydale, Arkansas. NPDES permit AR0052051, in force until Jan 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (119 values), outfall TX1 form B every 2 months
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 18 reports late

Limits in force (183)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 22.5 mg/Lall year001
Solids, total suspendedmonthly average≤ 21 lb/dall year001
Solids, total suspendeddaily maximum≤ 31.5 lb/dall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Oil & Greasemonthly average≤ 14 lb/dall year001
Oil & Greasedaily maximum≤ 21 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 5.6 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 5.6 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 7 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 14 lb/dJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 7.8 lb/dApr001
Nitrogen, ammonia total [as N]daily maximum≤ 10.5 lb/dMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 21 lb/dJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 7.8 lb/dApr001
Chloride [as Cl]monthly average≤ 94 mg/Lall year001
Chloride [as Cl]daily maximum≤ 141 mg/Lall year001
Chloride [as Cl]monthly average≤ 131.7 lb/dall year001
Chloride [as Cl]daily maximum≤ 197.6 lb/dall year001
Sulfate, total [as SO4]monthly average≤ 20 mg/Lall year001
Sulfate, total [as SO4]daily maximum≤ 30 mg/Lall year001
Sulfate, total [as SO4]monthly average≤ 28 lb/dall year001
Sulfate, total [as SO4]daily maximum≤ 42 lb/dall year001
Arsenic, total recoverablemonthly average≤ 1.33 mg/Lall year001
Arsenic, total recoverabledaily maximum≤ 2.95 mg/Lall year001
Arsenic, total recoverablemonthly average≤ 1.9 lb/dall year001
Arsenic, total recoverabledaily maximum≤ 4.1 lb/dall year001
Cobalt, total recoverablemonthly average≤ 18.8 mg/Lall year001
Cobalt, total recoverabledaily maximum≤ 56.4 mg/Lall year001
Cobalt, total recoverablemonthly average≤ 26.3 lb/dall year001
Cobalt, total recoverabledaily maximum≤ 79 lb/dall year001
Tin, total recoverablemonthly average≤ 165 ug/Lall year001
Tin, total recoverabledaily maximum≤ 335 ug/Lall year001
Tin, total recoverablemonthly average≤ .23 lb/dall year001
Tin, total recoverabledaily maximum≤ .47 lb/dall year001
Chromium, hexavalent [as Cr]monthly average≤ 11.8 ug/LMay–Oct001
Chromium, hexavalent [as Cr]monthly average≤ 26.9 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Chromium, hexavalent [as Cr]daily maximum≤ 23.7 ug/LMay–Oct001
Chromium, hexavalent [as Cr]daily maximum≤ 54.1 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Chromium, hexavalent [as Cr]monthly average≤ .017 lb/dMay–Oct001
Chromium, hexavalent [as Cr]monthly average≤ .038 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Chromium, hexavalent [as Cr]daily maximum≤ .033 lb/dMay–Oct001
Chromium, hexavalent [as Cr]daily maximum≤ .076 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nickel, total recoverablemonthly average≤ 97 ug/LMay–Oct001
Nickel, total recoverablemonthly average≤ 282.3 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Nickel, total recoverabledaily maximum≤ 194.6 ug/LMay–Oct001
Nickel, total recoverabledaily maximum≤ 566.4 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Nickel, total recoverablemonthly average≤ .14 lb/dMay–Oct001
Nickel, total recoverablemonthly average≤ .4 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nickel, total recoverabledaily maximum≤ .27 lb/dMay–Oct001
Nickel, total recoverabledaily maximum≤ .79 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Silver total recoverablemonthly average≤ .93 ug/LMay–Oct001
Silver total recoverablemonthly average≤ 1.8 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Silver total recoverabledaily maximum≤ 1.87 ug/LMay–Oct001
Silver total recoverabledaily maximum≤ 3.6 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Silver total recoverablemonthly average≤ .0013 lb/dMay–Oct001
Silver total recoverablemonthly average≤ .0025 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Silver total recoverabledaily maximum≤ .0026 lb/dMay–Oct001
Silver total recoverabledaily maximum≤ .0051 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Zinc, total recoverablemonthly average≤ 85.5 ug/LMay–Oct001
Zinc, total recoverablemonthly average≤ 166 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Zinc, total recoverabledaily maximum≤ 171.6 ug/LMay–Oct001
Zinc, total recoverabledaily maximum≤ 333.2 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Zinc, total recoverablemonthly average≤ .12 lb/dMay–Oct001
Zinc, total recoverablemonthly average≤ .23 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Zinc, total recoverabledaily maximum≤ .24 lb/dMay–Oct001
Zinc, total recoverabledaily maximum≤ .47 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Cadmium, total recoverablemonthly average≤ 1.8 ug/LMay–Oct001
Cadmium, total recoverablemonthly average≤ 5.4 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Cadmium, total recoverabledaily maximum≤ 3.7 ug/LMay–Oct001
Cadmium, total recoverabledaily maximum≤ 10.8 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Cadmium, total recoverablemonthly average≤ .0026 lb/dMay–Oct001
Cadmium, total recoverablemonthly average≤ .0075 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Cadmium, total recoverabledaily maximum≤ .0052 lb/dMay–Oct001
Cadmium, total recoverabledaily maximum≤ .015 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Lead, total recoverablemonthly average≤ 7.9 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Lead, total recoverablemonthly average≤ 2.7 ug/LMay–Oct001
Lead, total recoverabledaily maximum≤ 15.8 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Lead, total recoverabledaily maximum≤ 5.4 ug/LMay–Oct001
Lead, total recoverablemonthly average≤ .011 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Lead, total recoverablemonthly average≤ .0038 lb/dMay–Oct001
Lead, total recoverabledaily maximum≤ .022 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Lead, total recoverabledaily maximum≤ .0076 lb/dMay–Oct001
Chromium, total recoverablemonthly average≤ 323 ug/Lall year001
Chromium, total recoverabledaily maximum≤ 746 ug/Lall year001
Chromium, total recoverablemonthly average≤ .45 lb/dall year001
Chromium, total recoverabledaily maximum≤ 1.05 lb/dall year001
Copper, total recoverablemonthly average≤ 9.2 ug/LMay–Oct001
Copper, total recoverablemonthly average≤ 18.8 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Copper, total recoverabledaily maximum≤ 18.5 ug/LMay–Oct001
Copper, total recoverabledaily maximum≤ 37.8 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Copper, total recoverablemonthly average≤ .013 lb/dMay–Oct001
Copper, total recoverablemonthly average≤ .026 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Copper, total recoverabledaily maximum≤ .026 lb/dMay–Oct001
Copper, total recoverabledaily maximum≤ .053 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Radiation, gross betamonthly averagereport only (pCi/L)all year001
Radiation, gross betadaily maximumreport only (pCi/L)all year001
Radium 226, dissolvedmonthly averagereport only (pCi/L)all year001
Radium 226, dissolveddaily maximumreport only (pCi/L)all year001
Strontium 90, dissolvedmonthly averagereport only (pCi/L)all year001
Strontium 90, dissolveddaily maximumreport only (pCi/L)all year001
Butyl benzyl phthalatemonthly average≤ .0887 mg/Lall year001
Butyl benzyl phthalatedaily maximum≤ .188 mg/Lall year001
Butyl benzyl phthalatemonthly average≤ .12 lb/dall year001
Butyl benzyl phthalatedaily maximum≤ .26 lb/dall year001
Fluoranthenemonthly average≤ .0268 mg/Lall year001
Fluoranthenedaily maximum≤ .0537 mg/Lall year001
Fluoranthenemonthly average≤ .038 lb/dall year001
Fluoranthenedaily maximum≤ .075 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .101 mg/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ .215 mg/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .14 lb/dall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ .3 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
Chromium IIImonthly average≤ 860.1 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Chromium IIImonthly average≤ 295.4 ug/LMay–Oct001
Chromium IIIdaily maximum≤ 1725.7 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Chromium IIIdaily maximum≤ 592.8 ug/LMay–Oct001
Chromium IIImonthly average≤ 1.2 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Chromium IIImonthly average≤ .41 lb/dMay–Oct001
Chromium IIIdaily maximum≤ 2.4 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Chromium IIIdaily maximum≤ .83 lb/dMay–Oct001
Solids, total dissolvedmonthly average≤ 354 mg/Lall year001
Solids, total dissolveddaily maximum≤ 531 mg/Lall year001
Solids, total dissolvedmonthly average≤ 496 lb/dall year001
Solids, total dissolveddaily maximum≤ 744 lb/dall year001
Mercury, total recoverablemonthly average≤ .013 ug/LMay–Oct001
Mercury, total recoverablemonthly average≤ .039 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Mercury, total recoverabledaily maximum≤ .027 ug/LMay–Oct001
Mercury, total recoverabledaily maximum≤ .078 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Mercury, total recoverablemonthly average≤ .000019 lb/dMay–Oct001
Mercury, total recoverablemonthly average≤ .000055 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Mercury, total recoverabledaily maximum≤ .000038 lb/dMay–Oct001
Mercury, total recoverabledaily maximum≤ .00011 lb/dJan, Feb, Mar, Apr, Nov, Dec001
n-Decanemonthly average≤ .437 mg/Lall year001
n-Decanedaily maximum≤ .948 mg/Lall year001
n-Decanemonthly average≤ .61 lb/dall year001
n-Decanedaily maximum≤ 1.33 lb/dall year001
Carbazolemonthly average≤ .276 mg/Lall year001
Carbazoledaily maximum≤ .598 mg/Lall year001
Carbazolemonthly average≤ .39 lb/dall year001
Carbazoledaily maximum≤ .84 lb/dall year001
n-Octadecanemonthly average≤ .302 mg/Lall year001
n-Octadecanedaily maximum≤ .589 mg/Lall year001
n-Octadecanemonthly average≤ .42 lb/dall year001
n-Octadecanedaily maximum≤ .83 lb/dall year001
Cyanide, total recoverablemonthly average≤ 16.9 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Cyanide, total recoverablemonthly average≤ 5.8 ug/LMay–Oct001
Cyanide, total recoverabledaily maximum≤ 33.9 ug/LJan, Feb, Mar, Apr, Nov, Dec001
Cyanide, total recoverabledaily maximum≤ 11.6 ug/LMay–Oct001
Cyanide, total recoverablemonthly average≤ .024 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Cyanide, total recoverablemonthly average≤ .008 lb/dMay–Oct001
Cyanide, total recoverabledaily maximum≤ .047 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Cyanide, total recoverabledaily maximum≤ .016 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 14 lb/dall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 21 lb/dall year001
Whole effluent toxicity - retest #17-day minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #27-day minimumreport only (pass=0;fail=1)all yearTX1
WET, sublethal retest #17-day minimumreport only (pass=0;fail=1)all yearTX1
WET, sublethal retest #27-day minimumreport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity - Retest #37-day minimumreport only (pass=0;fail=1)all yearTX1
Whole Effluent Toxicity, Sub-Lethal Retest #37-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day minimumreport only (%)all yearTX1

How strict are these limits?

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

Same industry: the 4 Oil and Gas Extraction permits in Arkansas.

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