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Wichita, City of

Sewage treatment plant, major discharger, Wichita, Kansas. NPDES permit KS0043036, in force until Sep 30, 2028. Last 12 months: over a limit 39 times (last August 2026), 5 of 46 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (28 values), outfall 002 form A monthly (4 values), outfall 004 form R monthly (1 value), outfall 005 form A monthly (10 values), outfall 001 form B yearly, outfall 001 form W yearly
Renewal application due
Apr 3, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
30 values over a limit, 0 required values missing, 0 of 50 reports late

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

All 39 values over a limit
Period endingParameterReportedLimitOver by
February 2026BOD, 5-day, 20 deg. C, maximum weekly average53.6 mg/L≤ 45 mg/L19%
February 2026Nitrogen, ammonia total [as N], daily maximum12.5 mg/L≤ 9.5 mg/L32%
February 2026Solids, total suspended, monthly average39.74167 mg/L≤ 30 mg/L32%
February 2026Solids, total suspended, maximum weekly average60.66667 mg/L≤ 45 mg/L35%
March 2026BOD, 5-day, 20 deg. C, monthly average85.54615 mg/L≤ 25 mg/L242%
March 2026BOD, 5-day, 20 deg. C, maximum weekly average155.4 mg/L≤ 40 mg/L289%
March 2026E. coli, monthly geometric mean9208.24132 #/100mL≤ 2358 #/100mL291%
March 2026Nitrogen, ammonia total [as N], daily maximum38.2 mg/L≤ 8.9 mg/L329%
March 2026Nitrogen, ammonia total [as N], monthly average26.99545 mg/L≤ 3.8 mg/L610%
March 2026Solids, total suspended, monthly average128 mg/L≤ 30 mg/L327%
March 2026Solids, total suspended, maximum weekly average247.5 mg/L≤ 45 mg/L450%
April 2026BOD, 5-day, 20 deg. C, monthly average107.30769 mg/L≤ 25 mg/L329%
April 2026BOD, 5-day, 20 deg. C, maximum weekly average144 mg/L≤ 40 mg/L260%
April 2026E. coli, monthly geometric mean2623.31738 #/100mL≤ 262 #/100mL901%
April 2026E. coli, weekly geometric mean79620.5128 #/100mL≤ 4348 #/100mL1731%
April 2026Nitrogen, ammonia total [as N], daily maximum40.5 mg/L≤ 8.9 mg/L355%
April 2026Nitrogen, ammonia total [as N], monthly average35.93846 mg/L≤ 3.4 mg/L957%
April 2026Solids, total suspended, monthly average157.96429 mg/L≤ 30 mg/L427%
April 2026Solids, total suspended, maximum weekly average197.5 mg/L≤ 45 mg/L339%
May 2026BOD, 5-day, 20 deg. C, monthly average28.86923 mg/L≤ 20 mg/L44%
May 2026BOD, 5-day, 20 deg. C, maximum weekly average32.55 mg/L≤ 30 mg/L9%
May 2026Nitrogen, ammonia total [as N], daily maximum36.5 mg/L≤ 8.9 mg/L310%
May 2026Nitrogen, ammonia total [as N], monthly average30.98462 mg/L≤ 2.6 mg/L1092%
May 2026Solids, total suspended, monthly average54.73846 mg/L≤ 30 mg/L82%
May 2026Solids, total suspended, maximum weekly average71 mg/L≤ 45 mg/L58%
June 2026BOD, 5-day, 20 deg. C, monthly average25.03077 mg/L≤ 20 mg/L25%
June 2026E. coli, monthly geometric mean494.99248 #/100mL≤ 262 #/100mL89%
June 2026Nitrogen, ammonia total [as N], daily maximum23.5 mg/L≤ 8.9 mg/L164%
June 2026Nitrogen, ammonia total [as N], monthly average12.85176 mg/L≤ 1.8 mg/L614%
June 2026Solids, total suspended, monthly average56.66154 mg/L≤ 30 mg/L89%
June 2026Solids, total suspended, maximum weekly average83.16667 mg/L≤ 45 mg/L85%
July 2026BOD, 5-day, 20 deg. C, monthly average21.45 mg/L≤ 20 mg/L7%
July 2026BOD, 5-day, 20 deg. C, maximum weekly average41.4 mg/L≤ 30 mg/L38%
July 2026E. coli, monthly geometric mean462.31217 #/100mL≤ 262 #/100mL76%
July 2026Nitrogen, ammonia total [as N], daily maximum12.2 mg/L≤ 8.9 mg/L37%
July 2026Nitrogen, ammonia total [as N], monthly average1.85781 mg/L≤ 1.8 mg/L3%
July 2026Solids, total suspended, monthly average43.16429 mg/L≤ 30 mg/L44%
July 2026Solids, total suspended, maximum weekly average85.75 mg/L≤ 45 mg/L91%
August 2026Nitrogen, ammonia total [as N], monthly average1.84338 mg/L≤ 1.8 mg/L2%

Limits in force (128)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LFeb001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LNov001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LOct001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LApr001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJul001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LSep001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LDec001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJun001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LAug001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LMar001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LFeb001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LNov001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LMay001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LOct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LApr001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LJul001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LSep001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LDec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LJun001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LAug001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LMar001
pHdaily minimum≥ 6 SUall year001
pHmonthly averagereport only (SU)all year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 3.8 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 6.3 mg/LNov001
Nitrogen, ammonia total [as N]monthly average≤ 6.3 mg/LDec001
Nitrogen, ammonia total [as N]monthly average≤ 6.3 mg/LFeb001
Nitrogen, ammonia total [as N]monthly average≤ 3.8 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 6.3 mg/LJan001
Nitrogen, ammonia total [as N]monthly average≤ 2.6 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 3.4 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 2.6 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 9.5 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 9.5 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 9.5 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 8.9 mg/LJun001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Chloride [as Cl]monthly averagereport only (lb/d)all year001
Arsenic, total recoverablemonthly averagereport only (ug/L)all year001
Selenium, total recoverablemonthly averagereport only (ug/L)all year001
Thallium, total recoverablemonthly averagereport only (ug/L)all year001
Beryllium, total recoverable [as Be]monthly averagereport only (ug/L)all year001
Nickel, total recoverablemonthly averagereport only (ug/L)all year001
Silver total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Cadmium, total recoverablemonthly averagereport only (ug/L)all year001
Lead, total recoverablemonthly averagereport only (ug/L)all year001
Chromium, total recoverablemonthly averagereport only (ug/L)all year001
Copper, total recoverablemonthly averagereport only (ug/L)all year001
Antimony, total recoverablemonthly averagereport only (ug/L)all year001
Chloridedaily averagereport only (mg/L)all year001
ChlorideEPA's "DPD AVG"report only (lb/d)all year001
Priority Pollutantsmonthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. colimonthly geometric mean≤ 2358 #/100mLDec001
E. colimonthly geometric mean≤ 262 #/100mLAug001
E. colimonthly geometric mean≤ 2358 #/100mLMar001
E. colimonthly geometric mean≤ 262 #/100mLOct001
E. colimonthly geometric mean≤ 262 #/100mLMay001
E. colimonthly geometric mean≤ 262 #/100mLApr001
E. colimonthly geometric mean≤ 2358 #/100mLJan001
E. colimonthly geometric mean≤ 262 #/100mLJul001
E. colimonthly geometric mean≤ 2358 #/100mLNov001
E. colimonthly geometric mean≤ 262 #/100mLJun001
E. colimonthly geometric mean≤ 262 #/100mLSep001
E. colimonthly geometric mean≤ 2358 #/100mLFeb001
E. coliweekly geometric meanreport only (#/100mL)Dec001
E. coliweekly geometric mean≤ 4348 #/100mLAug001
E. coliweekly geometric meanreport only (#/100mL)Mar001
E. coliweekly geometric mean≤ 4348 #/100mLOct001
E. coliweekly geometric mean≤ 4348 #/100mLMay001
E. coliweekly geometric mean≤ 4348 #/100mLApr001
E. coliweekly geometric meanreport only (#/100mL)Jan001
E. coliweekly geometric mean≤ 4348 #/100mLJul001
E. coliweekly geometric meanreport only (#/100mL)Nov001
E. coliweekly geometric mean≤ 4348 #/100mLJun001
E. coliweekly geometric mean≤ 4348 #/100mLSep001
E. coliweekly geometric meanreport only (#/100mL)Feb001
Nitrogen, Total As Ndaily averagereport only (mg/L)all year001
Nitrogen, Total As NEPA's "DPD AVG"report only (lb/d)all year001
Phosphorus, Total As Pdaily averagereport only (mg/L)all year001
Phosphorus, Total As PEPA's "DPD AVG"report only (lb/d)all year001
Nitrite + Nitrate total [as N]daily averagereport only (mg/L)all year001
Mercury, total [as Hg]monthly averagereport only (ug/L)all year001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimum≥ 71 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesdaily minimum≥ 71 %all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year002
Solids, total suspendedmonthly averagereport only (mg/L)all year002
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year002
Phosphorus, total [as P]monthly averagereport only (mg/L)all year002
Flow, reclamationmonthly averagereport only (MGD)all year004
Temperature, water deg. centigrademonthly averagereport only (deg C)all year005
Oxygen, dissolved [DO]monthly averagereport only (mg/L)all year005
pHmonthly averagereport only (SU)all year005
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year005
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year005
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year005
Phosphorus, total [as P]monthly averagereport only (mg/L)all year005
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year005
Chloride [as Cl]monthly averagereport only (mg/L)all year005
E. colimonthly geometric meanreport only (#/100mL)all year005

New limits from Sep 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrite + Nitrate total [as N], daily average10 mg/Lnew19.79 mg/L (11 values)1.98×
Phosphorus, Total As P, EPA's "DPD AVG"317.45 lb/dnew1111 lb/d (11 values)3.5×
Nitrogen, ammonia total [as N], daily maximum3.3 mg/L (Sep)tighter——
Nitrogen, ammonia total [as N], daily maximum3.6 mg/L (May)tighter——
Nitrogen, ammonia total [as N], daily maximum2.1 mg/L (Aug)tighter——
Nitrogen, ammonia total [as N], daily maximum8.2 mg/L (Mar)tighter——
Nitrogen, ammonia total [as N], daily maximum2.7 mg/L (Jun)tighter——
Nitrogen, ammonia total [as N], daily maximum4.6 mg/L (Apr)tighter——
Nitrogen, ammonia total [as N], daily maximum5.6 mg/L (Oct)tighter——
Nitrogen, ammonia total [as N], daily maximum8.6 mg/L (Nov)tighter——
Nitrogen, ammonia total [as N], daily maximum2.1 mg/L (Jul)tighter——
Nitrogen, ammonia total [as N], monthly average1.1 mg/L (Sep)tighter——
Nitrogen, ammonia total [as N], monthly average3 mg/L (Feb)tighter——
Nitrogen, ammonia total [as N], monthly average0.9 mg/L (Jun)tighter——
Nitrogen, ammonia total [as N], monthly average1.2 mg/L (May)tighter——
Nitrogen, ammonia total [as N], monthly average0.7 mg/L (Aug)tighter——
Nitrogen, ammonia total [as N], monthly average2.3 mg/L (Mar)tighter——
Nitrogen, ammonia total [as N], monthly average1.4 mg/L (Apr)tighter——
Nitrogen, ammonia total [as N], monthly average1.7 mg/L (Oct)tighter——
Nitrogen, ammonia total [as N], monthly average2.4 mg/L (Nov)tighter——
Nitrogen, ammonia total [as N], monthly average3.2 mg/L (Jan)tighter——
Nitrogen, ammonia total [as N], monthly average3.2 mg/L (Dec)tighter——
Nitrogen, ammonia total [as N], monthly average0.7 mg/L (Jul)tighter——

How strict are these limits?

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

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