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Durant City Utilities Auth

Sewage treatment plant, major discharger, Durant, Oklahoma. NPDES permit OK0039063, in force until May 31, 2030. Last 12 months: over a limit 75 times (last September 2026), 28 required values missing, 12 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (21 values), outfall TX1 form Q quarterly (20 values), outfall SLD form F yearly, outfall SLD form P yearly, outfall SLL form A yearly, outfall SLS form A yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
84 values over a limit, 2 required values missing, 2 of 19 reports late

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

All 75 values over a limit
Period endingOutfallParameterReportedLimitOver by
October 2025001BOD, carbonaceous [5 day, 20 C], monthly average28.4 mg/L≤ 10 mg/L184%
October 2025001BOD, carbonaceous [5 day, 20 C], monthly average536.81 lb/d≤ 296.1 lb/d81%
October 2025001BOD, carbonaceous [5 day, 20 C], weekly average42.36 mg/L≤ 15 mg/L182%
October 2025001Nitrogen, ammonia total [as N], monthly average28.68 mg/L≤ 2 mg/L1334%
October 2025001Nitrogen, ammonia total [as N], monthly average536.48 lb/d≤ 59.2 lb/d806%
October 2025001Nitrogen, ammonia total [as N], weekly average35.6 mg/L≤ 3 mg/L1087%
October 2025001Solids, total suspended, monthly average210.9 mg/L≤ 15 mg/L1306%
October 2025001Solids, total suspended, monthly average3590.97 lb/d≤ 444.1 lb/d709%
October 2025001Solids, total suspended, weekly average700 mg/L≤ 22.5 mg/L3011%
November 2025001Nitrogen, ammonia total [as N], daily maximum33.5 mg/L≤ 9.9 mg/L238%
November 2025001Nitrogen, ammonia total [as N], monthly average27.43 mg/L≤ 4.1 mg/L569%
November 2025001Nitrogen, ammonia total [as N], monthly average344.22 lb/d≤ 121.4 lb/d184%
November 2025001Oxygen, dissolved [DO], minimum5.71 mg/L≥ 6 mg/L5%
December 2025001Nitrogen, ammonia total [as N], daily maximum13.1 mg/L≤ 9.9 mg/L32%
December 2025001Nitrogen, ammonia total [as N], monthly average151.57 lb/d≤ 121.4 lb/d25%
December 2025001Nitrogen, ammonia total [as N], monthly average8.79 mg/L≤ 4.1 mg/L114%
December 2025TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum75 %≥ 100 %25%
January 2026001Nitrogen, ammonia total [as N], daily maximum14.8 mg/L≤ 9.9 mg/L49%
January 2026001Nitrogen, ammonia total [as N], monthly average217.02 lb/d≤ 121.4 lb/d79%
January 2026001Nitrogen, ammonia total [as N], monthly average9.91 mg/L≤ 4.1 mg/L142%
February 2026001BOD, carbonaceous [5 day, 20 C], weekly average35.61 mg/L≤ 22.5 mg/L58%
February 2026001Nitrogen, ammonia total [as N], monthly average140.35 lb/d≤ 121.4 lb/d16%
February 2026001Nitrogen, ammonia total [as N], monthly average6.02 mg/L≤ 4.1 mg/L47%
February 2026001Solids, total suspended, monthly average36.7 mg/L≤ 30 mg/L22%
February 2026001Solids, total suspended, monthly average911.53 lb/d≤ 888.2 lb/d3%
February 2026001Solids, total suspended, weekly average88.8 mg/L≤ 45 mg/L97%
March 2026001BOD, carbonaceous [5 day, 20 C], monthly average17.04 mg/L≤ 15 mg/L14%
March 2026001BOD, carbonaceous [5 day, 20 C], weekly average25.32 mg/L≤ 22.5 mg/L13%
March 2026001Oxygen, dissolved [DO], minimum5.98 mg/L≥ 6 mg/L0%
April 2026001BOD, carbonaceous [5 day, 20 C], monthly average18.41 mg/L≤ 10 mg/L84%
April 2026001BOD, carbonaceous [5 day, 20 C], weekly average34.41 mg/L≤ 15 mg/L129%
April 2026001Nitrogen, ammonia total [as N], monthly average7.83 mg/L≤ 4 mg/L96%
April 2026001Nitrogen, ammonia total [as N], weekly average11 mg/L≤ 6 mg/L83%
April 2026001Oxygen, dissolved [DO], minimum4.62 mg/L≥ 6 mg/L23%
April 2026001Solids, total suspended, monthly average34.98 mg/L≤ 15 mg/L133%
April 2026001Solids, total suspended, weekly average68 mg/L≤ 22.5 mg/L202%
April 2026001pH, minimum6.38 SU≥ 6.5 SU—
May 2026001BOD, carbonaceous [5 day, 20 C], weekly average15.03 mg/L≤ 15 mg/L0%
May 2026001E. coli, daily maximum> 406 CFU/100mL≤ 406 CFU/100mL—
May 2026001E. coli, geometric mean2422 CFU/100mL≤ 126 CFU/100mL1822%
May 2026001Nitrogen, ammonia total [as N], monthly average13.38 mg/L≤ 4 mg/L235%
May 2026001Nitrogen, ammonia total [as N], weekly average16.2 mg/L≤ 6 mg/L170%
May 2026001Solids, total suspended, monthly average29.25 mg/L≤ 15 mg/L95%
May 2026001Solids, total suspended, weekly average46.2 mg/L≤ 22.5 mg/L105%
May 2026TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum56 %≥ 100 %44%
June 2026001E. coli, daily maximum> 406 CFU/100mL≤ 406 CFU/100mL—
June 2026001E. coli, geometric mean10000 CFU/100mL≤ 126 CFU/100mL7837%
June 2026001Nitrogen, ammonia total [as N], monthly average10.04 mg/L≤ 2 mg/L402%
June 2026001Nitrogen, ammonia total [as N], monthly average72.29 lb/d≤ 59.2 lb/d22%
June 2026001Nitrogen, ammonia total [as N], weekly average11.8 mg/L≤ 3 mg/L293%
June 2026001Solids, total suspended, monthly average19 mg/L≤ 15 mg/L27%
June 2026001Solids, total suspended, weekly average32.5 mg/L≤ 22.5 mg/L44%
June 2026TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum75≥ 100 %25%
June 2026TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum75 %≥ 100 %25%
June 2026TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum75 %≥ 100 %25%
July 2026001E. coli, daily maximum> 406 CFU/100mL≤ 406 CFU/100mL—
July 2026001E. coli, geometric mean> 406 CFU/100mL≤ 126 CFU/100mL—
July 2026001Nitrogen, ammonia total [as N], monthly average104.42 lb/d≤ 59.2 lb/d76%
July 2026001Nitrogen, ammonia total [as N], monthly average16.65 mg/L≤ 2 mg/L733%
July 2026001Nitrogen, ammonia total [as N], weekly average24.5 mg/L≤ 3 mg/L717%
August 2026001E. coli, daily maximum> 406 CFU/100mL≤ 406 CFU/100mL—
August 2026001E. coli, geometric mean10000 CFU/100mL≤ 126 CFU/100mL7837%
August 2026001Nitrogen, ammonia total [as N], monthly average194.61 lb/d≤ 59.2 lb/d229%
August 2026001Nitrogen, ammonia total [as N], monthly average21.08 mg/L≤ 2 mg/L954%
August 2026001Nitrogen, ammonia total [as N], weekly average23.7 mg/L≤ 3 mg/L690%
August 2026001Solids, total suspended, monthly average17.43 mg/L≤ 15 mg/L16%
August 2026001Solids, total suspended, weekly average42.4 mg/L≤ 22.5 mg/L88%
August 2026TX1Whole Effluent Toxicity [WET] - C. dubia, 7-day minimum0 %≥ 100 %100%
September 2026001E. coli, daily maximum> 406 CFU/100mL≤ 406 CFU/100mL—
September 2026001E. coli, geometric mean> 406 CFU/100mL≤ 126 CFU/100mL—
September 2026001Nitrogen, ammonia total [as N], monthly average102.23 lb/d≤ 59.2 lb/d73%
September 2026001Nitrogen, ammonia total [as N], monthly average16.63 mg/L≤ 2 mg/L732%
September 2026001Nitrogen, ammonia total [as N], weekly average26.3 mg/L≤ 3 mg/L777%
September 2026001Solids, total suspended, monthly average36.28 mg/L≤ 15 mg/L142%
September 2026001Solids, total suspended, weekly average108 mg/L≤ 22.5 mg/L380%

Limits in force (108)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum≥ 5 mg/LJun–Oct001
Oxygen, dissolved [DO]minimum≥ 6 mg/LJan, Feb, Mar, Nov, Dec001
Oxygen, dissolved [DO]minimum≥ 6 mg/LApr, May001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 15 mg/LApr–Oct001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec001
Solids, total suspendedweekly average≤ 22.5 mg/LApr–Oct001
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Nov, Dec001
Solids, total suspendedmonthly average≤ 444.1 lb/dApr–Oct001
Solids, total suspendedmonthly average≤ 888.2 lb/dJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LApr, May001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 4.1 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 6 mg/LApr, May001
Nitrogen, ammonia total [as N]weekly average≤ 3 mg/LJun–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 9.9 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 118.4 lb/dApr, May001
Nitrogen, ammonia total [as N]monthly average≤ 59.2 lb/dJun–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 121.4 lb/dJan, Feb, Mar, Nov, Dec001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]weekly averagereport only (mg/L)all year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ 25.2 ug/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]daily maximum≤ 36.4 ug/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .75 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
E. coligeometric mean≤ 126 CFU/100mLMay–Sep001
E. colidaily maximum≤ 406 CFU/100mLMay–Sep001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LJan, Feb, Mar, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LApr–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 22.5 mg/LJan, Feb, Mar, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LApr–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 444.1 lb/dJan, Feb, Mar, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 296.1 lb/dApr–Oct001
Toxicity characteristic leaching proceduremonthly average minimumreport only (pass=0;fail=1)all yearSLD
Ann. amt sludge disposed by other methodannual totalreport only (DMT/y)all yearSLD
Annual amt of sludge incineratedannual totalreport only (DMT/y)all yearSLD
Annual sludge production, totalannual totalreport only (DMT/y)all yearSLD
Annual amount of sludge land appliedannual totalreport only (DMT/y)all yearSLD
Annual amt. sludge disposed surface unitannual totalreport only (DMT/y)all yearSLD
Annual amt sludge disposed in landfillannual totalreport only (DMT/y)all yearSLD
Annual amt sludge transported interstateannual totalreport only (DMT/y)all yearSLD
Compliance w/part 258 sludge requirementvaluereport only (N=0;Y=1)all yearSLD
Arsenic, dry weightsingle samplereport only (mg/kg)all yearSLL
Arsenic, dry weightmaximum≤ 75 mg/kgall yearSLL
Arsenic, dry weightmaximum value≤ 41 kg/haall yearSLL
Selenium, dry weightsingle samplereport only (mg/kg)all yearSLL
Selenium, dry weightmaximum≤ 100 mg/kgall yearSLL
Selenium, dry weightmaximum value≤ 100 kg/haall yearSLL
Polychlorinated biphenyls [PCBs]annual maximum≤ 49.99 mg/kgall yearSLL
Copper, dry weightsingle samplereport only (mg/kg)all yearSLL
Copper, dry weightmaximum≤ 4300 mg/kgall yearSLL
Copper, dry weightmaximum value≤ 1500 kg/haall yearSLL
Cadmium, dry weightsingle samplereport only (mg/kg)all yearSLL
Cadmium, dry weightmaximum≤ 85 mg/kgall yearSLL
Cadmium, dry weightmaximum valuereport only (kg/ha)all yearSLL
Annual whole sludge application ratemaximum valuereport only (met t/ha/yr)all yearSLL
Molybdenum, sludge, total, dry weight [as Mo]single samplereport only (mg/kg)all yearSLL
Molybdenum, sludge, total, dry weight [as Mo]maximum≤ 75 mg/kgall yearSLL
Molybdenum, sludge, total, dry weight [as Mo]maximum valuereport only (kg/ha)all yearSLL
Zinc, sludge, total, dry weight [as Zn]single samplereport only (mg/kg)all yearSLL
Zinc, sludge, total, dry weight [as Zn]maximum≤ 7500 mg/kgall yearSLL
Zinc, sludge, total, dry weight [as Zn]maximum value≤ 2800 kg/haall yearSLL
Lead, sludge, total, dry weight [as Pb]single samplereport only (mg/kg)all yearSLL
Lead, sludge, total, dry weight [as Pb]maximum≤ 840 mg/kgall yearSLL
Lead, sludge, total, dry weight [as Pb]maximum value≤ 300 kg/haall yearSLL
Nickel, sludge, total, dry weight [as Ni]single samplereport only (mg/kg)all yearSLL
Nickel, sludge, total, dry weight [as Ni]maximum≤ 420 mg/kgall yearSLL
Nickel, sludge, total, dry weight [as Ni]maximum value≤ 420 kg/haall yearSLL
Mercury, sludge, total, dry weight [as Hg]single samplereport only (mg/kg)all yearSLL
Mercury, sludge, total, dry weight [as Hg]maximum≤ 57 mg/kgall yearSLL
Mercury, sludge, total, dry weight [as Hg]maximum value≤ 17 kg/haall yearSLL
Pollutant table from 503.13valuereport only (table #)all yearSLL
Level of pathogen requirements achievedmaximum valuereport only (state class)all yearSLL
Description of pathogen option usedvaluereport only (alt #)all yearSLL
Vector attraction reduction alternative usedvaluereport only (alt #)all yearSLL
Arsenic, dry weightallowable concentrationreport only (mg/kg)all yearSLS
Arsenic, dry weightsingle samplereport only (mg/kg)all yearSLS
Unit w/liner/leachate collection systemvaluereport only (N=0;Y=1)all yearSLS
Unit boundary to property line distancevaluereport only (m)all yearSLS
Nickel, sludge, total, dry weight [as Ni]allowable concentrationreport only (mg/kg)all yearSLS
Nickel, sludge, total, dry weight [as Ni]single samplereport only (mg/kg)all yearSLS
Chromium, sludge, total, dry weight [as Cr]allowable concentrationreport only (mg/kg)all yearSLS
Chromium, sludge, total, dry weight [as Cr]single samplereport only (mg/kg)all yearSLS
Level of pathogen requirements achievedsingle samplereport only (state class)all yearSLS
Description of pathogen option usedvaluereport only (alt #)all yearSLS
Vector attraction reduction alternative usedvaluereport only (alt #)all yearSLS
pHdaily minimumreport only (SU)all yearTX1
pHdaily maximumreport only (SU)all yearTX1
Nitrogen, ammonia total [as N]daily minimumreport only (mg/L)all yearTX1
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearTX1
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearTX1
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
Whole Effluent Toxicity [WET] - C. dubia7-day minimum≥ 100 %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
%Mortality 7Day Chronic Ceriodaphnia dubia7-day minimumreport only (%)all yearTX1
%Mortality Static Renewal 7Day Chronic Pimephales Promelas7-day minimumreport only (%)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: Oklahoma's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0039063 · MCP: https://passage-data.com/mcp