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Sherwood Improvement District (WWTP)

Sewage treatment plant, major discharger, Topeka, Kansas. NPDES permit KS0117731, in force until Jun 30, 2030. Last 12 months: over a limit once (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: outfall 001 form A monthly (22 values), outfall 002 form A monthly (4 values), outfall 001 form B yearly, outfall 001 form W yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
May 2026E. coli, monthly geometric mean863.34234 #/100mL≤ 262 #/100mL230%

Limits in force (112)

ParameterStatisticLimitMonthsOutfall
Conductivitymonthly averagereport only (umho/cm)all year001
Oxygen, dissolved [DO]minimum weekly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LMar001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LNov001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJul001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LFeb001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LAug001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJun001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LApr001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LDec001
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≤ 20 mg/LSep001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LMay001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LMar001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LNov001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LJul001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LFeb001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LAug001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 30 mg/LJun001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LApr001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LDec001
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≤ 30 mg/LSep001
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 average≤ 1.5 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LNov001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 4.7 mg/LJan001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 4.9 mg/LDec001
Nitrogen, ammonia total [as N]monthly average≤ 2.8 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 2.8 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 4.1 mg/LFeb001
Nitrogen, ammonia total [as N]monthly average≤ 4.1 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 9.2 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 31.6 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 8 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 9.1 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 12.8 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 28.1 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 29.9 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 17.4 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 20.1 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 21.3 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 21.3 mg/LMar001
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
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
Priority Pollutantsmonthly averagereport only (ug/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. colimonthly geometric mean≤ 2358 #/100mLMar001
E. colimonthly geometric mean≤ 262 #/100mLMay001
E. colimonthly geometric mean≤ 262 #/100mLJul001
E. colimonthly geometric mean≤ 262 #/100mLJun001
E. colimonthly geometric mean≤ 262 #/100mLAug001
E. colimonthly geometric mean≤ 262 #/100mLSep001
E. colimonthly geometric mean≤ 262 #/100mLApr001
E. colimonthly geometric mean≤ 2358 #/100mLFeb001
E. colimonthly geometric mean≤ 2358 #/100mLDec001
E. colimonthly geometric mean≤ 2358 #/100mLNov001
E. colimonthly geometric mean≤ 262 #/100mLOct001
E. colimonthly geometric mean≤ 2358 #/100mLJan001
E. coliweekly geometric meanreport only (#/100mL)Mar001
E. coliweekly geometric mean≤ 4348 #/100mLMay001
E. coliweekly geometric mean≤ 4348 #/100mLJul001
E. coliweekly geometric mean≤ 4348 #/100mLJun001
E. coliweekly geometric mean≤ 4348 #/100mLAug001
E. coliweekly geometric mean≤ 4348 #/100mLSep001
E. coliweekly geometric mean≤ 4348 #/100mLApr001
E. coliweekly geometric meanreport only (#/100mL)Feb001
E. coliweekly geometric meanreport only (#/100mL)Dec001
E. coliweekly geometric meanreport only (#/100mL)Nov001
E. coliweekly geometric mean≤ 4348 #/100mLOct001
E. coliweekly geometric meanreport only (#/100mL)Jan001
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
Mercury, total [as Hg]monthly averagereport only (ug/L)all year001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimum≥ 79 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesdaily minimum≥ 79 %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

New limits from Dec 1, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Phosphorus, Total As P, EPA's "DPD AVG"20.05 lb/dnew33.45 lb/d (11 values)1.67×

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/KS0117731 · MCP: https://passage-data.com/mcp