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Hinckley city of

Sewage treatment plant, Hinckley, Minnesota. NPDES permit MN0023701, in force until Jan 31, 2029. Last 12 months: no values over a limit, 2 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D027 form A1 monthly (24 values), outfall D027 form A2 monthly (2 values), outfall S030 form A1 monthly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 36 reports late

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimum≥ 5 mg/Lall yearD027
pHmonthly minimum≥ 6 SUall yearD027
pHmonthly maximum≤ 9 SUall yearD027
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD027
Solids, total suspendedmonthly maximumreport only (mg/L)JulD027
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD027
Solids, total suspendedmonthly average≤ 77 kg/dall yearD027
Solids, total suspendedmaximum weekly average≤ 115.5 kg/dall yearD027
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD027
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)MarD027
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LJun–SepD027
Nitrogen, ammonia total [as N]monthly averagereport only (kg/d)MarD027
Nitrogen, ammonia total [as N]monthly average≤ 7.7 kg/dJun–SepD027
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD027
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD027
Phosphorus, total [as P]monthly average≤ 1 mg/LJun–SepD027
Phosphorus, total [as P]monthly average≤ 1 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, DecD027
Phosphorus, total [as P]monthly average≤ 5.4 kg/dJun–SepD027
Phosphorus, total [as P]monthly averagereport only (kg/d)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD027
Phosphorus, total [as P]annual total≤ 942 kg/yrall yearD027
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD027
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD027
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD027
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD027
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD027
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD027
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD027
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall yearD027
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 22.5 mg/Lall yearD027
BOD, carbonaceous [5 day, 20 C]monthly average≤ 38 kg/dall yearD027
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 57 kg/dall yearD027
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD027
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD027
Precipitation, total defined period/inmonthly totalreport only (in)all yearS030
pHmonthly minimumreport only (SU)all yearS030
pHmonthly maximumreport only (SU)all yearS030
Solids, total suspendedmonthly averagereport only (mg/L)all yearS030
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS030
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS030
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS030
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS030
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS030
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS030
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS030

How strict are these limits?

Cited limits by parameter: Minnesota'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/MN0023701 · MCP: https://passage-data.com/mcp