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El Dorado Chemical Company

Nitrogenous Fertilizers, major discharger, El Dorado, Arkansas. NPDES permit AR0000752 expired Sep 30, 2022; its limits still apply. Last 12 months: over a limit 79 times (last August 2026), 14 of 143 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (33 values), outfall 001 form Q quarterly (2 values), outfall 002 form A monthly (34 values), outfall 003 form A monthly (16 values), outfall 003 form Q quarterly (26 values), outfall 006 form A monthly (28 values), and 13 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
155 values over a limit, 3 required values missing, 0 of 158 reports late

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

All 79 values over a limit
Period endingOutfallParameterReportedLimitOver by
October 2025001Chloride [as Cl], daily maximum69 mg/L≤ 57 mg/L21%
October 2025001Chloride [as Cl], monthly average69 mg/L≤ 38 mg/L82%
October 2025001Nitrogen, ammonia total [as N], daily maximum190 mg/L≤ 18 mg/L956%
October 2025001Nitrogen, ammonia total [as N], monthly average180 mg/L≤ 12 mg/L1400%
October 2025001Solids, total dissolved, daily maximum640 mg/L≤ 356 mg/L80%
October 2025001Solids, total dissolved, monthly average640 mg/L≤ 237 mg/L170%
October 2025003Nitrogen, ammonia total [as N], daily maximum1.4 lb/d≤ 1.1 lb/d27%
October 2025003Nitrogen, ammonia total [as N], daily maximum21 mg/L≤ 7.5 mg/L180%
October 2025003Nitrogen, ammonia total [as N], monthly average1.4 lb/d≤ .7 lb/d100%
October 2025003Nitrogen, ammonia total [as N], monthly average21 mg/L≤ 5 mg/L320%
October 2025010BOD, carbonaceous [5 day, 20 C], daily maximum396.53 lb/d≤ 125.1 lb/d217%
October 2025010Nitrogen, ammonia total [as N], daily maximum3965.32 lb/d≤ 605 lb/d555%
October 2025010Nitrogen, ammonia total [as N], monthly average2620.05 lb/d≤ 265.2 lb/d888%
October 2025010Nitrogen, nitrate total [as N], daily maximum4803.16 lb/d≤ 1568.3 lb/d206%
October 2025010Nitrogen, nitrate total [as N], monthly average2916.62 lb/d≤ 581.3 lb/d402%
October 2025101Nitrogen, nitrate total [as N], daily maximum5366.29 lb/d≤ 1568.3 lb/d242%
October 2025101Nitrogen, nitrate total [as N], monthly average5321.59 lb/d≤ 581.3 lb/d815%
October 2025TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum42 %≥ 100 %58%
October 2025TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum< 32 %≥ 80 %—
October 2025TX1Whole Effluent Toxicity [WET] - C. dubia, daily average minimum42 %≥ 100 %58%
October 2025TX1Whole Effluent Toxicity [WET] - C. dubia, daily average minimum< 32 %≥ 80 %—
October 2025TX1Whole Effluent Toxicity [WET] - P. promelas, 7-day minimum< 32 %≥ 80 %—
October 2025TX1Whole Effluent Toxicity [WET] - P. promelas, daily average minimum< 32 %≥ 80 %—
November 2025010Nitrogen, ammonia total [as N], daily maximum3979.67 lb/d≤ 605 lb/d558%
November 2025010Nitrogen, ammonia total [as N], monthly average2926.62 lb/d≤ 265.2 lb/d1004%
November 2025010Nitrogen, nitrate total [as N], daily maximum4475.15 lb/d≤ 1568.3 lb/d185%
November 2025010Nitrogen, nitrate total [as N], monthly average3959.04 lb/d≤ 581.3 lb/d581%
December 2025010Nitrogen, ammonia total [as N], daily maximum3313.54 lb/d≤ 605 lb/d448%
December 2025010Nitrogen, ammonia total [as N], monthly average2791.08 lb/d≤ 265.2 lb/d952%
December 2025010Nitrogen, nitrate total [as N], daily maximum4302.75 lb/d≤ 1568.3 lb/d174%
December 2025010Nitrogen, nitrate total [as N], monthly average3666.09 lb/d≤ 581.3 lb/d531%
January 2026003Nitrogen, ammonia total [as N], monthly average12 mg/L≤ 10 mg/L20%
January 2026010Nitrogen, ammonia total [as N], daily maximum2818.06 lb/d≤ 605 lb/d366%
January 2026010Nitrogen, ammonia total [as N], monthly average2500.05 lb/d≤ 265.2 lb/d843%
January 2026010Nitrogen, nitrate total [as N], daily maximum3482.89 lb/d≤ 1568.3 lb/d122%
January 2026010Nitrogen, nitrate total [as N], monthly average3227.13 lb/d≤ 581.3 lb/d455%
February 2026010Nitrogen, ammonia total [as N], daily maximum4475.29 lb/d≤ 605 lb/d640%
February 2026010Nitrogen, ammonia total [as N], monthly average2994.77 lb/d≤ 265.2 lb/d1029%
February 2026010Nitrogen, nitrate total [as N], daily maximum5306.08 lb/d≤ 1568.3 lb/d238%
February 2026010Nitrogen, nitrate total [as N], monthly average4008.74 lb/d≤ 581.3 lb/d590%
February 2026010Zinc, total recoverable, monthly average8.401 lb/d≤ 7.35 lb/d14%
March 2026010Nitrogen, ammonia total [as N], daily maximum6129.36 lb/d≤ 605 lb/d913%
March 2026010Nitrogen, ammonia total [as N], monthly average3334.68 lb/d≤ 265.2 lb/d1157%
March 2026010Nitrogen, nitrate total [as N], daily maximum6618.67 lb/d≤ 1568.3 lb/d322%
March 2026010Nitrogen, nitrate total [as N], monthly average5443.78 lb/d≤ 581.3 lb/d836%
April 2026010Nitrogen, ammonia total [as N], daily maximum4465.39 lb/d≤ 605 lb/d638%
April 2026010Nitrogen, ammonia total [as N], monthly average3021.39 lb/d≤ 265.2 lb/d1039%
April 2026010Nitrogen, nitrate total [as N], daily maximum5126.93 lb/d≤ 1568.3 lb/d227%
April 2026010Nitrogen, nitrate total [as N], monthly average4679.77 lb/d≤ 581.3 lb/d705%
May 2026010BOD, carbonaceous [5 day, 20 C], daily maximum165.41 lb/d≤ 125.1 lb/d32%
May 2026010BOD, carbonaceous [5 day, 20 C], monthly average105.67 lb/d≤ 83.4 lb/d27%
May 2026010Nitrogen, ammonia total [as N], daily maximum6302.63 lb/d≤ 605 lb/d942%
May 2026010Nitrogen, ammonia total [as N], monthly average4337.95 lb/d≤ 265.2 lb/d1536%
May 2026010Nitrogen, nitrate total [as N], daily maximum6134.71 lb/d≤ 1568.3 lb/d291%
May 2026010Nitrogen, nitrate total [as N], monthly average5192.64 lb/d≤ 581.3 lb/d793%
May 2026010Zinc, total recoverable, monthly average11.938 lb/d≤ 7.35 lb/d62%
June 2026003Coliform, fecal general, 30-day geometric mean1250.6 #/100mL≤ 1000 #/100mL25%
June 2026010BOD, carbonaceous [5 day, 20 C], daily maximum197.37 lb/d≤ 125.1 lb/d58%
June 2026010Nitrogen, ammonia total [as N], daily maximum5256.69 lb/d≤ 605 lb/d769%
June 2026010Nitrogen, ammonia total [as N], monthly average4268.96 lb/d≤ 265.2 lb/d1510%
June 2026010Nitrogen, nitrate total [as N], daily maximum6467.09 lb/d≤ 1568.3 lb/d312%
June 2026010Nitrogen, nitrate total [as N], monthly average5578.29 lb/d≤ 581.3 lb/d860%
June 2026010Zinc, total recoverable, monthly average10.778 lb/d≤ 7.35 lb/d47%
July 2026003Nitrogen, ammonia total [as N], daily maximum1.82 lb/d≤ 1.1 lb/d65%
July 2026003Nitrogen, ammonia total [as N], daily maximum7.6 mg/L≤ 7.5 mg/L1%
July 2026003Nitrogen, ammonia total [as N], monthly average1.82 lb/d≤ .7 lb/d160%
July 2026003Nitrogen, ammonia total [as N], monthly average7.6 mg/L≤ 5 mg/L52%
July 2026010BOD, carbonaceous [5 day, 20 C], daily maximum198.96 lb/d≤ 125.1 lb/d59%
July 2026010Nitrogen, ammonia total [as N], daily maximum5626.56 lb/d≤ 605 lb/d830%
July 2026010Nitrogen, ammonia total [as N], monthly average4443.3 lb/d≤ 265.2 lb/d1575%
July 2026010Nitrogen, nitrate total [as N], daily maximum5957.53 lb/d≤ 1568.3 lb/d280%
July 2026010Nitrogen, nitrate total [as N], monthly average4738.86 lb/d≤ 581.3 lb/d715%
July 2026010Zinc, total recoverable, monthly average8.375 lb/d≤ 7.35 lb/d14%
August 2026010BOD, carbonaceous [5 day, 20 C], daily maximum148.52 lb/d≤ 125.1 lb/d19%
August 2026010Nitrogen, ammonia total [as N], daily maximum5288 lb/d≤ 605 lb/d774%
August 2026010Nitrogen, ammonia total [as N], monthly average3180 lb/d≤ 265.2 lb/d1099%
August 2026010Nitrogen, nitrate total [as N], daily maximum4950 lb/d≤ 1568.3 lb/d216%
August 2026010Nitrogen, nitrate total [as N], monthly average3677 lb/d≤ 581.3 lb/d533%
August 2026010Zinc, total recoverable, monthly average8.086 lb/d≤ 7.35 lb/d10%

Limits in force (442)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 4 mg/LMay–Oct001
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 700.6 lb/dall year001
Solids, total suspendeddaily maximum≤ 1050.8 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 2.43 mg/LApr–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 5.5 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LApr–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.65 mg/LApr–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 8.25 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LApr–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec001
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, nitrate total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, nitrate total [as N]daily maximumreport only (lb/d)all year001
Chloride [as Cl]monthly average≤ 19 mg/Lall year001
Chloride [as Cl]monthly average≤ 38 mg/Lall year001
Chloride [as Cl]daily maximum≤ 28.5 mg/Lall year001
Chloride [as Cl]daily maximum≤ 57 mg/Lall year001
Chloride [as Cl]monthly averagereport only (lb/d)all year001
Chloride [as Cl]monthly averagereport only (lb/d)all year001
Chloride [as Cl]daily maximumreport only (lb/d)all year001
Chloride [as Cl]daily maximumreport only (lb/d)all year001
Sulfate, total [as SO4]monthly average≤ 41 mg/Lall year001
Sulfate, total [as SO4]monthly average≤ 81 mg/Lall year001
Sulfate, total [as SO4]daily maximum≤ 61.5 mg/Lall year001
Sulfate, total [as SO4]daily maximum≤ 122 mg/Lall year001
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year001
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year001
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year001
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Copper, total recoverablemonthly average≤ 12.2 ug/Lall year001
Copper, total recoverabledaily maximum≤ 24.48 ug/Lall year001
Copper, total recoverablemonthly average≤ .28 lb/dall year001
Copper, total recoverabledaily maximum≤ .57 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≤ 138 mg/Lall year001
Solids, total dissolvedmonthly average≤ 237 mg/Lall year001
Solids, total dissolveddaily maximum≤ 207 mg/Lall year001
Solids, total dissolveddaily maximum≤ 356 mg/Lall year001
Solids, total dissolvedmonthly averagereport only (lb/d)all year001
Solids, total dissolvedmonthly averagereport only (lb/d)all year001
Solids, total dissolveddaily maximumreport only (lb/d)all year001
Solids, total dissolveddaily maximumreport only (lb/d)all year001
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly averagereport only (mg/L)all year002
Solids, total suspendeddaily maximumreport only (mg/L)all year002
Oil & Greasemonthly average≤ 10 mg/Lall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Nitrogen, ammonia total [as N]monthly average≤ 0 mg/LApr–Oct002
Nitrogen, ammonia total [as N]monthly average≤ .32 mg/LJan, Feb, Mar, Nov, Dec002
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LApr–Oct002
Nitrogen, ammonia total [as N]monthly average≤ 12 mg/LJan, Feb, Mar, Nov, Dec002
Nitrogen, ammonia total [as N]daily maximum≤ 0 mg/LApr–Oct002
Nitrogen, ammonia total [as N]daily maximum≤ .48 mg/LJan, Feb, Mar, Nov, Dec002
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LApr–Oct002
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LJan, Feb, Mar, Nov, Dec002
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct002
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec002
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct002
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec002
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct002
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec002
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct002
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec002
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year002
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year002
Nitrogen, nitrate total [as N]monthly averagereport only (lb/d)all year002
Nitrogen, nitrate total [as N]daily maximumreport only (lb/d)all year002
Chloride [as Cl]monthly average≤ 19 mg/Lall year002
Chloride [as Cl]monthly averagereport only (mg/L)all year002
Chloride [as Cl]daily maximum≤ 28.5 mg/Lall year002
Chloride [as Cl]daily maximumreport only (mg/L)all year002
Chloride [as Cl]monthly averagereport only (lb/d)all year002
Chloride [as Cl]monthly averagereport only (lb/d)all year002
Chloride [as Cl]daily maximumreport only (lb/d)all year002
Chloride [as Cl]daily maximumreport only (lb/d)all year002
Sulfate, total [as SO4]monthly average≤ 41 mg/Lall year002
Sulfate, total [as SO4]monthly average≤ 250 mg/Lall year002
Sulfate, total [as SO4]daily maximum≤ 61.5 mg/Lall year002
Sulfate, total [as SO4]daily maximum≤ 375 mg/Lall year002
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year002
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year002
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year002
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year002
Zinc, total recoverablemonthly average≤ 115.62 ug/Lall year002
Zinc, total recoverabledaily maximum≤ 231.99 ug/Lall year002
Lead, total recoverablemonthly average≤ 3.8 ug/Lall year002
Lead, total recoverabledaily maximum≤ 7.62 ug/Lall year002
Copper, total recoverablemonthly average≤ 12.2 ug/Lall year002
Copper, total recoverabledaily maximum≤ 24.48 ug/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
Solids, total dissolvedmonthly average≤ 138 mg/Lall year002
Solids, total dissolvedmonthly average≤ 500 mg/Lall year002
Solids, total dissolveddaily maximum≤ 207 mg/Lall year002
Solids, total dissolveddaily maximum≤ 750 mg/Lall year002
Solids, total dissolvedmonthly averagereport only (lb/d)all year002
Solids, total dissolvedmonthly averagereport only (lb/d)all year002
Solids, total dissolveddaily maximumreport only (lb/d)all year002
Solids, total dissolveddaily maximumreport only (lb/d)all year002
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec003
Oxygen, dissolved [DO]instantaneous minimum≥ 4 mg/LMay–Oct003
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Solids, total suspendedmonthly average≤ 15 mg/Lall year003
Solids, total suspendeddaily maximum≤ 22.5 mg/Lall year003
Solids, total suspendedmonthly average≤ 2.1 lb/dall year003
Solids, total suspendeddaily maximum≤ 3.2 lb/dall year003
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec003
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct003
Nitrogen, ammonia total [as N]monthly average≤ 2.43 mg/LApr–Oct003
Nitrogen, ammonia total [as N]monthly average≤ 5.5 mg/LJan, Feb, Mar, Nov, Dec003
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec003
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 mg/LMay–Oct003
Nitrogen, ammonia total [as N]daily maximum≤ 3.65 mg/LApr–Oct003
Nitrogen, ammonia total [as N]daily maximum≤ 8.25 mg/LJan, Feb, Mar, Nov, Dec003
Nitrogen, ammonia total [as N]monthly average≤ 1.4 lb/dJan, Feb, Mar, Apr, Nov, Dec003
Nitrogen, ammonia total [as N]monthly average≤ .7 lb/dMay–Oct003
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct003
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec003
Nitrogen, ammonia total [as N]daily maximum≤ 2.1 lb/dJan, Feb, Mar, Apr, Nov, Dec003
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dMay–Oct003
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct003
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec003
Chloride [as Cl]monthly average≤ 19 mg/Lall year003
Chloride [as Cl]monthly averagereport only (mg/L)all year003
Chloride [as Cl]daily maximum≤ 28.5 mg/Lall year003
Chloride [as Cl]daily maximumreport only (mg/L)all year003
Chloride [as Cl]monthly averagereport only (lb/d)all year003
Chloride [as Cl]monthly averagereport only (lb/d)all year003
Chloride [as Cl]daily maximumreport only (lb/d)all year003
Chloride [as Cl]daily medianreport only (lb/d)all year003
Sulfate, total [as SO4]monthly average≤ 41 mg/Lall year003
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year003
Sulfate, total [as SO4]daily maximum≤ 61.5 mg/Lall year003
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year003
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year003
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year003
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year003
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year003
Zinc, total recoverablemonthly averagereport only (ug/L)all year003
Zinc, total recoverabledaily maximumreport only (ug/L)all year003
Zinc, total recoverablemonthly averagereport only (lb/d)all year003
Zinc, total recoverabledaily maximumreport only (lb/d)all year003
Copper, total recoverablemonthly averagereport only (ug/L)all year003
Copper, total recoverabledaily maximumreport only (ug/L)all year003
Copper, total recoverablemonthly averagereport only (lb/d)all year003
Copper, total recoverabledaily maximumreport only (lb/d)all 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
Solids, total dissolvedmonthly average≤ 138 mg/Lall year003
Solids, total dissolvedmonthly averagereport only (mg/L)all year003
Solids, total dissolveddaily maximum≤ 207 mg/Lall year003
Solids, total dissolveddaily minimumreport only (mg/L)all year003
Solids, total dissolvedmonthly averagereport only (lb/d)all year003
Solids, total dissolvedmonthly averagereport only (lb/d)all year003
Solids, total dissolveddaily maximumreport only (lb/d)all year003
Solids, total dissolveddaily maximumreport only (lb/d)all year003
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year003
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year003
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year003
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/Lall year003
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1.4 lb/dall year003
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 2.1 lb/dall year003
Streamflowmonthly averagereport only (MGD)all year006
Streamflowmonthly averagereport only (MGD)all year006
Streamflowdaily maximumreport only (MGD)all year006
Streamflowdaily maximumreport only (MGD)all 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
Oil & Greasemonthly average≤ 10 mg/Lall year006
Oil & Greasedaily maximum≤ 15 mg/Lall year006
Nitrogen, ammonia total [as N]monthly average≤ 0 mg/LApr–Oct006
Nitrogen, ammonia total [as N]monthly average≤ .32 mg/LJan, Feb, Mar, Nov, Dec006
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Apr–Oct006
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec006
Nitrogen, ammonia total [as N]daily maximum≤ 0 mg/LApr–Oct006
Nitrogen, ammonia total [as N]daily maximum≤ .48 mg/LJan, Feb, Mar, Nov, Dec006
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Oct006
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Nov, Dec006
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct006
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec006
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct006
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec006
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct006
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec006
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct006
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec006
Chloride [as Cl]monthly average≤ 19 mg/Lall year006
Chloride [as Cl]monthly averagereport only (mg/L)all year006
Chloride [as Cl]daily maximum≤ 28.5 mg/Lall year006
Chloride [as Cl]daily maximumreport only (mg/L)all year006
Chloride [as Cl]monthly averagereport only (lb/d)all year006
Chloride [as Cl]monthly averagereport only (lb/d)all year006
Chloride [as Cl]daily maximumreport only (lb/d)all year006
Chloride [as Cl]daily maximumreport only (lb/d)all year006
Sulfate, total [as SO4]monthly average≤ 41 mg/Lall year006
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year006
Sulfate, total [as SO4]daily maximum≤ 61.5 mg/Lall year006
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year006
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year006
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year006
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year006
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year006
Zinc, total recoverablemonthly averagereport only (ug/L)all year006
Zinc, total recoverabledaily maximumreport only (ug/L)all year006
Lead, total recoverablemonthly averagereport only (ug/L)all year006
Lead, total recoverabledaily maximumreport only (ug/L)all year006
Copper, total recoverablemonthly averagereport only (ug/L)all year006
Copper, total recoverabledaily maximumreport only (ug/L)all year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all 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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Solids, total dissolvedmonthly average≤ 138 mg/Lall year006
Solids, total dissolvedmonthly averagereport only (mg/L)all year006
Solids, total dissolveddaily maximum≤ 207 mg/Lall year006
Solids, total dissolveddaily maximumreport only (mg/L)all year006
Solids, total dissolvedmonthly averagereport only (lb/d)all year006
Solids, total dissolvedmonthly averagereport only (lb/d)all year006
Solids, total dissolveddaily maximumreport only (lb/d)all year006
Solids, total dissolveddaily maximumreport only (lb/d)all year006
Streamflowmonthly averagereport only (MGD)all year007
Streamflowmonthly averagereport only (MGD)all year007
Streamflowdaily maximumreport only (MGD)all year007
Streamflowdaily maximumreport only (MGD)all 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
Oil & Greasemonthly average≤ 10 mg/Lall year007
Oil & Greasedaily maximum≤ 15 mg/Lall year007
Nitrogen, ammonia total [as N]monthly average≤ 0 mg/LApr–Oct007
Nitrogen, ammonia total [as N]monthly average≤ .32 mg/LJan, Feb, Mar, Nov, Dec007
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Apr–Oct007
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec007
Nitrogen, ammonia total [as N]daily maximum≤ 0 mg/LApr–Oct007
Nitrogen, ammonia total [as N]daily maximum≤ .48 mg/LJan, Feb, Mar, Nov, Dec007
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–Oct007
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Nov, Dec007
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct007
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec007
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Apr–Oct007
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec007
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct007
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec007
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Apr–Oct007
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)Jan, Feb, Mar, Nov, Dec007
Chloride [as Cl]monthly average≤ 19 mg/Lall year007
Chloride [as Cl]monthly averagereport only (mg/L)all year007
Chloride [as Cl]daily maximum≤ 28.5 mg/Lall year007
Chloride [as Cl]daily maximumreport only (mg/L)all year007
Chloride [as Cl]monthly averagereport only (lb/d)all year007
Chloride [as Cl]monthly averagereport only (lb/d)all year007
Chloride [as Cl]daily maximumreport only (lb/d)all year007
Chloride [as Cl]daily maximumreport only (lb/d)all year007
Sulfate, total [as SO4]monthly average≤ 41 mg/Lall year007
Sulfate, total [as SO4]monthly averagereport only (mg/L)all year007
Sulfate, total [as SO4]daily maximum≤ 61.5 mg/Lall year007
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year007
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year007
Sulfate, total [as SO4]monthly averagereport only (lb/d)all year007
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year007
Sulfate, total [as SO4]daily maximumreport only (lb/d)all year007
Zinc, total recoverablemonthly averagereport only (ug/L)all year007
Zinc, total recoverabledaily maximumreport only (ug/L)all year007
Lead, total recoverablemonthly averagereport only (ug/L)all year007
Lead, total recoverabledaily maximumreport only (ug/L)all year007
Copper, total recoverablemonthly averagereport only (ug/L)all year007
Copper, total recoverabledaily maximumreport only (ug/L)all year007
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all 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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year007
Solids, total dissolvedmonthly average≤ 138 mg/Lall year007
Solids, total dissolvedmonthly averagereport only (mg/L)all year007
Solids, total dissolveddaily maximum≤ 207 mg/Lall year007
Solids, total dissolveddaily maximumreport only (mg/L)all year007
Solids, total dissolvedmonthly averagereport only (lb/d)all year007
Solids, total dissolvedmonthly averagereport only (lb/d)all year007
Solids, total dissolveddaily maximumreport only (lb/d)all year007
Solids, total dissolveddaily maximumreport only (lb/d)all year007
Oxygen, dissolved [DO]minimumreport only (mg/L)all year010
pHminimum≥ 6 SUall year010
pHmaximum≤ 9 SUall year010
Solids, total suspendedmonthly average≤ 500.4 lb/dall year010
Solids, total suspendedmonthly average≤ 500.4 lb/dall year010
Solids, total suspendedmonthly average≤ 500.4 lb/dall year010
Solids, total suspendeddaily maximum≤ 750.6 lb/dall year010
Solids, total suspendeddaily maximum≤ 750.6 lb/dall year010
Solids, total suspendeddaily maximum≤ 750.6 lb/dall year010
Oil & Greasemonthly average≤ 166.8 lb/dall year010
Oil & Greasedaily maximum≤ 250.2 lb/dall year010
Nitrogen, ammonia total [as N]monthly average≤ 265.2 lb/dall year010
Nitrogen, ammonia total [as N]daily maximum≤ 605 lb/dall year010
Nitrogen, nitrate total [as N]monthly average≤ 581.3 lb/dall year010
Nitrogen, nitrate total [as N]daily maximum≤ 1568.3 lb/dall year010
Phosphorus, total [as P]monthly averagereport only (mg/L)all year010
Phosphorus, total [as P]monthly averagereport only (mg/L)all year010
Phosphorus, total [as P]monthly averagereport only (mg/L)all year010
Phosphorus, total [as P]daily maximumreport only (mg/L)all year010
Phosphorus, total [as P]daily maximumreport only (mg/L)all year010
Phosphorus, total [as P]daily maximumreport only (mg/L)all 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≤ .66 lb/dall year010
Selenium, total recoverabledaily maximum≤ 1.32 lb/dall year010
Nickel, total recoverablemonthly average≤ 14.23 lb/dall year010
Nickel, total recoverabledaily maximum≤ 28.55 lb/dall year010
Silver total recoverablemonthly average≤ .08 lb/dall year010
Silver total recoverabledaily maximum≤ .16 lb/dall year010
Zinc, total recoverablemonthly average≤ 7.35 lb/dall year010
Zinc, total recoverabledaily maximum≤ 14.75 lb/dall year010
Cadmium, total recoverablemonthly average≤ .22 lb/dall year010
Cadmium, total recoverabledaily maximum≤ .45 lb/dall year010
Lead, total recoverablemonthly average≤ .4 lb/dall year010
Lead, total recoverabledaily maximum≤ .8 lb/dall year010
Copper, total recoverablemonthly average≤ .82 lb/dall year010
Copper, total recoverabledaily maximum≤ 1.65 lb/dall year010
Chromium, hexavalent dissolved [as Cr]monthly average≤ .96 lb/dall year010
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 1.93 lb/dall year010
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year010
Flow, in conduit or thru treatment plantdaily maximum≤ 2 MGDall year010
Chromium IIImonthly average≤ 39.52 lb/dall year010
Chromium IIIdaily maximum≤ 79.29 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 general30-day geometric meanreport only (#/100mL)all year010
Coliform, fecal general7-day geometric meanreport only (#/100mL)all year010
Cyanide, total recoverablemonthly average≤ .68 lb/dall year010
Cyanide, total recoverabledaily maximum≤ 1.37 lb/dall year010
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83.4 lb/dMay–Oct010
BOD, carbonaceous [5 day, 20 C]monthly average≤ 166.8 lb/dJan, Feb, Mar, Apr, Nov, Dec010
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83.4 lb/dMay–Oct010
BOD, carbonaceous [5 day, 20 C]monthly average≤ 166.8 lb/dJan, Feb, Mar, Apr, Nov, Dec010
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83.4 lb/dMay–Oct010
BOD, carbonaceous [5 day, 20 C]monthly average≤ 166.8 lb/dJan, Feb, Mar, Apr, Nov, Dec010
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 125.1 lb/dMay–Oct010
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 250.2 lb/dJan, Feb, Mar, Apr, Nov, Dec010
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 125.1 lb/dMay–Oct010
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 250.2 lb/dJan, Feb, Mar, Apr, Nov, Dec010
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 125.1 lb/dMay–Oct010
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 250.2 lb/dJan, Feb, Mar, Apr, Nov, Dec010
Nitrogen, nitrate total [as N]monthly average≤ 581.3 lb/dall year101
Nitrogen, nitrate total [as N]daily maximum≤ 1568.3 lb/dall year101
Nitrogen, ammonia total [as N]monthly average≤ 37.9 lb/dApr–Oct102
Nitrogen, ammonia total [as N]monthly average≤ 85.78 lb/dJan, Feb, Mar, Nov, Dec102
Nitrogen, ammonia total [as N]daily maximum≤ 56.85 lb/dApr–Oct102
Nitrogen, ammonia total [as N]daily maximum≤ 128.67 lb/dJan, Feb, Mar, Nov, Dec102
Chloride [as Cl]monthly average≤ 265 lb/dall year102
Chloride [as Cl]daily maximum≤ 397.5 lb/dall year102
Sulfate, total [as SO4]monthly average≤ 503 lb/dall year102
Sulfate, total [as SO4]daily maximum≤ 754.5 lb/dall year102
Solids, total dissolvedmonthly average≤ 1338 lb/dall year102
Solids, total dissolveddaily maximum≤ 2007 lb/dall year102
Nitrogen, ammonia total [as N]monthly average≤ 0 lb/dApr–Oct103
Nitrogen, ammonia total [as N]monthly average≤ 5.16 lb/dJan, Feb, Mar, Nov, Dec103
Nitrogen, ammonia total [as N]daily maximum≤ 0 lb/dApr–Oct103
Nitrogen, ammonia total [as N]daily maximum≤ 7.74 lb/dJan, Feb, Mar, Nov, Dec103
Chloride [as Cl]monthly average≤ 73 lb/dall year103
Chloride [as Cl]daily maximum≤ 109.5 lb/dall year103
Sulfate, total [as SO4]monthly average≤ 33 lb/dall year103
Sulfate, total [as SO4]daily maximum≤ 49.5 lb/dall year103
Solids, total dissolvedmonthly average≤ 635 lb/dall year103
Solids, total dissolveddaily maximum≤ 952.5 lb/dall year103
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX04
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX04
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX04
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX04
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX04
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX04
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX04
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX04
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX04
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX04
Whole Effluent Toxicity [WET] - C. dubiadaily average minimum≥ 100 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 100 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubiadaily average minimum≥ 80 %all yearTX1
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 80 %all yearTX1
Whole Effluent Toxicity [WET] - P. promelasdaily average minimum≥ 100 %all yearTX1
Whole Effluent Toxicity [WET] - P. promelas7-day minimum≥ 100 %all yearTX1
Whole Effluent Toxicity [WET] - P. promelasdaily average minimum≥ 80 %all yearTX1
Whole Effluent Toxicity [WET] - P. promelas7-day minimum≥ 80 %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
Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (pass=0;fail=1)all yearTX2
LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all yearTX2
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX2
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX2
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (pass=0;fail=1)all yearTX2
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (pass=0;fail=1)all yearTX2
NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48-hour minimumreport only (%)all yearTX2
NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48-hour minimumreport only (%)all yearTX2
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX2
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX2
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX2
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX2
Coef Of Var Static Renewal 48Hr Acute D. pulex48-hour minimumreport only (%)all yearTX2
Coef Of Var Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX2
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7-day averagereport only (%)all yearTX2
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7-day averagereport only (%)all yearTX2

How strict are these limits?

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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Your permit document is the final word. As JSON: /api/v1/permits/AR0000752 · MCP: https://passage-data.com/mcp