Prairie Band POTAWATOMI Nation - Casino Complex — NPDES permit KS0093777: limits, due date and EPA's record

Sewage treatment plant, Mayetta, Kansas. NPDES permit KS0093777 expired Mar 5, 2024; its limits still apply. Last 12 months: over a limit 4 times (last June 2026), 43 required values missing, 27 of 27 reports late. Source: EPA ECHO, Oct 22, 2026.

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

Period ending	Parameter	Reported	Limit	Over by
November 2025	Nitrogen, ammonia total [as N], daily maximum	14.3 mg/L	≤ 8.35 mg/L	71%
November 2025	Nitrogen, ammonia total [as N], monthly average	14.3 mg/L	≤ 3.65 mg/L	292%
June 2026	Nitrogen, ammonia total [as N], daily maximum	6.36 mg/L	≤ 4.64 mg/L	37%
June 2026	Nitrogen, ammonia total [as N], monthly average	6.36 mg/L	≤ 2.02 mg/L	215%

Limits in force (42)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	monthly average	report only (deg F)	all year	001
Oxygen, dissolved [DO]	minimum	≥ 5 mg/L	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 45 mg/L	all year	001
BOD, 5-day, 20 deg. C	weekly average	≤ 65 mg/L	all year	001
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	monthly average	≤ 80 mg/L	all year	001
Solids, total suspended	weekly average	≤ 120 mg/L	all year	001
Nitrogen, ammonia total [as N]	monthly average	report only (mg/L)	all year	001
Phosphorus, total [as P]	monthly average	report only (mg/L)	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
E. coli, colony forming units [CFU]	geometric mean	≤ 3843 CFU/100mL	Jan, Feb, Mar, Nov, Dec	001
E. coli, colony forming units [CFU]	geometric mean	≤ 427 CFU/100mL	Apr–Oct	001
BOD, 5-day, percent removal	monthly average minimum	≥ 65 %	all year	001
Duration of discharge	event total	report only (d)	all year	001
Flow, total	average	report only (Mgal/mo)	all year	001
Temperature, water deg. fahrenheit	average	report only (deg F)	all year	002
Oxygen, dissolved [DO]	minimum	≥ 5 mg/L	all year	002
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year	002
BOD, 5-day, 20 deg. C	weekly average	≤ 45 mg/L	all year	002
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Solids, total suspended	monthly average	≤ 30 mg/L	all year	002
Solids, total suspended	weekly average	≤ 45 mg/L	all year	002
Nitrogen, total [as N]	monthly average	report only (mg/L)	all year	002
Nitrogen, ammonia total [as N]	monthly average	≤ 2.02 mg/L	Mar–Oct	002
Nitrogen, ammonia total [as N]	monthly average	≤ 3.65 mg/L	Jan, Feb, Nov, Dec	002
Nitrogen, ammonia total [as N]	daily maximum	≤ 4.64 mg/L	Mar–Oct	002
Nitrogen, ammonia total [as N]	daily maximum	≤ 8.35 mg/L	Jan, Feb, Nov, Dec	002
Nitrogen, Kjeldahl, total [as N]	average	report only (mg/L)	all year	002
Nitrite + Nitrate total [as N]	average	report only (mg/L)	all year	002
Phosphorus, total [as P]	average	report only (mg/L)	all year	002
Oil and grease	average	report only (mg/L)	all year	002
Flow, in conduit or thru treatment plant	average	report only (MGD)	all year	002
E. coli, colony forming units [CFU]	geometric mean	≤ 3843 CFU/100mL	Jan, Feb, Mar, Nov, Dec	002
E. coli, colony forming units [CFU]	geometric mean	≤ 427 CFU/100mL	Apr–Oct	002
Solids, total dissolved [TDS]	average	report only (mg/L)	all year	002
BOD, 5-day, percent removal	monthly average minimum	≥ 85 %	all year	002
Solids, suspended percent removal	minimum	≥ 85 %	all year	002
BOD, 5-day, 20 deg. C	average	report only (mg/L)	all year	003
Solids, total suspended	average	report only (mg/L)	all year	003
Flow, in conduit or thru treatment plant	average	report only (MGD)	all year	003

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/KS0093777 · MCP: https://passage-data.com/mcp