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Miami Co. S.D - Walnut Creek Estates

Sewage treatment plant, Hillsdale, Kansas. NPDES permit KS0093441, in force until Dec 31, 2029. Last 12 months: over a limit 2 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: outfall 001 form A monthly (19 values), outfall 002 form A monthly (4 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 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
July 2026Nitrogen, ammonia total [as N], daily maximum6 mg/L≤ 4.8 mg/L25%
July 2026Nitrogen, ammonia total [as N], monthly average6 mg/L≤ 4.4 mg/L36%

Limits in force (56)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year001
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, ammonia total [as N]monthly average≤ 4.4 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 4.4 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 8.6 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 10.6 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 7.4 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 16.2 mg/LMar001
Nitrogen, ammonia total [as N]monthly average≤ 14.3 mg/LNov001
Nitrogen, ammonia total [as N]monthly average≤ 16.7 mg/LDec001
Nitrogen, ammonia total [as N]monthly average≤ 5.7 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 5.4 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 16.7 mg/LFeb001
Nitrogen, ammonia total [as N]monthly average≤ 16.7 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 12.5 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 6.3 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 6 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 16.7 mg/LJan001
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
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. colimonthly geometric mean≤ 160 #/100mLMay001
E. colimonthly geometric mean≤ 160 #/100mLJun001
E. colimonthly geometric mean≤ 2358 #/100mLFeb001
E. colimonthly geometric mean≤ 160 #/100mLOct001
E. colimonthly geometric mean≤ 2358 #/100mLJan001
E. colimonthly geometric mean≤ 160 #/100mLAug001
E. colimonthly geometric mean≤ 160 #/100mLJul001
E. colimonthly geometric mean≤ 2358 #/100mLMar001
E. colimonthly geometric mean≤ 160 #/100mLSep001
E. colimonthly geometric mean≤ 160 #/100mLApr001
E. colimonthly geometric mean≤ 2358 #/100mLNov001
E. colimonthly geometric mean≤ 2358 #/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/KS0093441 · MCP: https://passage-data.com/mcp