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Grand Traverse Band of Ottawa

Sewage treatment plant, Suttons Bay, Michigan. NPDES permit MI0054640 expired Aug 21, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 21 days after each period: form A quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (72)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 4 mg/Lall year
Oxygen, dissolved [DO]minimum≥ 4 mg/Lall year
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
pHminimumreport only (SU)all year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 22.5 mg/Lall year
Solids, total suspendedweekly average≤ 22.5 mg/Lall year
Solids, total suspendedmonthly average≤ 15 lb/dall year
Solids, total suspendedmonthly average≤ 15 lb/dall year
Solids, total suspendedweekly average≤ 22.5 lb/dall year
Solids, total suspendedweekly average≤ 22.5 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ .5 mg/Lall year
Phosphorus, total [as P]monthly average≤ .5 mg/Lall year
Phosphorus, total [as P]maximum≤ 1 mg/Lall year
Phosphorus, total [as P]maximum≤ 1 mg/Lall year
Phosphorus, total [as P]monthly average≤ .5 lb/dall year
Phosphorus, total [as P]monthly average≤ .5 lb/dall year
Phosphorus, total [as P]maximum≤ 1 lb/dall year
Phosphorus, total [as P]maximum≤ 1 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmaximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmaximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. colimonthly geometric mean≤ 126 #/100mLMay–Sep
E. colimonthly geometric mean≤ 126 #/100mLMay–Sep
E. colimaximum≤ 235 #/100mLMay–Sep
E. colimaximum≤ 235 #/100mLMay–Sep
Mercury, total [as Hg]monthly average≤ 1.3 ng/LJan, Jul
Mercury, total [as Hg]monthly average≤ 1.3 ng/LJan, Jul
Mercury, total [as Hg]maximumreport only (ng/L)Jan, Jul
Mercury, total [as Hg]maximumreport only (ng/L)Jan, Jul
Mercury, total [as Hg]maximumreport only (ng/L)Jan, Jul
Mercury, total [as Hg]maximumreport only (ng/L)Jan, Jul
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 20 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 20 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12.1 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12.1 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 20 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 20 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all year
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year
Outfall observation,visual, y/n responsevaluereport only (N=0;Y=1)all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MI0054640 · MCP: https://passage-data.com/mcp