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Lyons, City of

Sewage treatment plant, Lyons, Kansas. NPDES permit KS0022730, in force until Sep 30, 2027. Last 12 months: over a limit 35 times (last August 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)
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
64 values over a limit, 0 required values missing, 0 of 24 reports late

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

All 35 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum35.8 mg/L≤ 6.9 mg/L419%
October 2025Nitrogen, ammonia total [as N], monthly average35.8 mg/L≤ 2.2 mg/L1527%
November 2025Nitrogen, ammonia total [as N], daily maximum28 mg/L≤ 9.4 mg/L198%
November 2025Nitrogen, ammonia total [as N], monthly average28 mg/L≤ 2.9 mg/L866%
December 2025Nitrogen, ammonia total [as N], daily maximum28 mg/L≤ 9.8 mg/L186%
December 2025Nitrogen, ammonia total [as N], monthly average28 mg/L≤ 3.7 mg/L657%
January 2026Nitrogen, ammonia total [as N], daily maximum29.1 mg/L≤ 9.8 mg/L197%
January 2026Nitrogen, ammonia total [as N], monthly average29.1 mg/L≤ 3.7 mg/L686%
February 2026BOD, 5-day, 20 deg. C, monthly average55 mg/L≤ 30 mg/L83%
February 2026BOD, 5-day, 20 deg. C, maximum weekly average55 mg/L≤ 45 mg/L22%
February 2026Nitrogen, ammonia total [as N], daily maximum30.1 mg/L≤ 9.8 mg/L207%
February 2026Nitrogen, ammonia total [as N], monthly average30.1 mg/L≤ 3.7 mg/L714%
February 2026Solids, total suspended, monthly average60 mg/L≤ 30 mg/L100%
February 2026Solids, total suspended, maximum weekly average60 mg/L≤ 45 mg/L33%
March 2026BOD, 5-day, 20 deg. C, monthly average48.4 mg/L≤ 30 mg/L61%
March 2026BOD, 5-day, 20 deg. C, maximum weekly average48.4 mg/L≤ 45 mg/L8%
March 2026Nitrogen, ammonia total [as N], daily maximum36.7 mg/L≤ 9.8 mg/L274%
March 2026Nitrogen, ammonia total [as N], monthly average36.7 mg/L≤ 3.6 mg/L919%
March 2026Solids, total suspended, monthly average76 mg/L≤ 30 mg/L153%
March 2026Solids, total suspended, maximum weekly average76 mg/L≤ 45 mg/L69%
April 2026BOD, 5-day, 20 deg. C, monthly average36.3 mg/L≤ 30 mg/L21%
April 2026Nitrogen, ammonia total [as N], daily maximum42.7 mg/L≤ 7.3 mg/L485%
April 2026Nitrogen, ammonia total [as N], monthly average42.7 mg/L≤ 2.3 mg/L1757%
April 2026Solids, total suspended, monthly average70 mg/L≤ 30 mg/L133%
April 2026Solids, total suspended, maximum weekly average70 mg/L≤ 45 mg/L56%
May 2026Nitrogen, ammonia total [as N], daily maximum31.2 mg/L≤ 5.6 mg/L457%
May 2026Nitrogen, ammonia total [as N], monthly average31.2 mg/L≤ 1.9 mg/L1542%
May 2026Oxygen, dissolved [DO], minimum weekly average5.925 mg/L≥ 6 mg/L1%
June 2026Nitrogen, ammonia total [as N], daily maximum28.9 mg/L≤ 3.8 mg/L661%
June 2026Nitrogen, ammonia total [as N], monthly average28.9 mg/L≤ 1.4 mg/L1964%
June 2026Oxygen, dissolved [DO], minimum weekly average5.835 mg/L≥ 6 mg/L3%
July 2026Nitrogen, ammonia total [as N], daily maximum28.8 mg/L≤ 3 mg/L860%
July 2026Nitrogen, ammonia total [as N], monthly average28.8 mg/L≤ 1.1 mg/L2518%
August 2026Nitrogen, ammonia total [as N], daily maximum22.2 mg/L≤ 3.3 mg/L573%
August 2026Nitrogen, ammonia total [as N], monthly average22.2 mg/L≤ 1.2 mg/L1750%

Limits in force (81)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]minimum weekly average≥ 6 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LJun001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LNov001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LMar001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LDec001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LApr001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LJul001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LFeb001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LAug001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LMay001
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LSep001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LOct001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LJun001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LNov001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LMar001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LJan001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LDec001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LApr001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LJul001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LFeb001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LAug001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LMay001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 40 mg/LSep001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/LOct001
pHdaily minimum≥ 6 SUall 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≤ 1.2 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LNov001
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 3.7 mg/LDec001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 2.3 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 3.6 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 3.7 mg/LJan001
Nitrogen, ammonia total [as N]monthly average≤ 3.7 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 3.3 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 9.4 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 9.8 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 7.3 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 9.8 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 5.6 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 9.8 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 9.8 mg/LFeb001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly average≤ 10 mg/Lall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Chloride [as Cl]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. colimonthly geometric mean≤ 3843 #/100mLNov001
E. colimonthly geometric mean≤ 427 #/100mLSep001
E. colimonthly geometric mean≤ 3843 #/100mLMar001
E. colimonthly geometric mean≤ 427 #/100mLAug001
E. colimonthly geometric mean≤ 427 #/100mLJul001
E. colimonthly geometric mean≤ 427 #/100mLOct001
E. colimonthly geometric mean≤ 3843 #/100mLJan001
E. colimonthly geometric mean≤ 427 #/100mLJun001
E. colimonthly geometric mean≤ 427 #/100mLApr001
E. colimonthly geometric mean≤ 3843 #/100mLFeb001
E. colimonthly geometric mean≤ 427 #/100mLMay001
E. colimonthly geometric mean≤ 3843 #/100mLDec001
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
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

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/KS0022730 · MCP: https://passage-data.com/mcp