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Adams city of

Sewage treatment plant, Adams, Minnesota. NPDES permit MN0021261 expired Sep 30, 2025; its limits still apply. Last 12 months: over a limit once (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D026 form A1 monthly (30 values), outfall D026 form A2 monthly (1 value), outfall S027 form A1 monthly (12 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 26 reports late

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

Period endingParameterReportedLimitOver by
March 2026BOD, carb-5 day, 20 deg C, percent removal, monthly average minimum83≥ 85 %13%

Limits in force (48)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]monthly minimum≥ 5 mg/Lall yearD026
pHmonthly minimum≥ 6 SUall yearD026
pHmonthly maximum≤ 9 SUall yearD026
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD026
Solids, total suspendedmonthly maximumreport only (mg/L)May, SepD026
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD026
Solids, total suspendedmonthly average≤ 31.6 kg/dall yearD026
Solids, total suspendedmaximum weekly average≤ 47.4 kg/dall yearD026
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD026
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJun–SepD026
Nitrogen, ammonia total [as N]monthly average≤ 13 mg/LOct, NovD026
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, DecD026
Nitrogen, ammonia total [as N]monthly average≤ 18 mg/LApr, MayD026
Nitrogen, ammonia total [as N]monthly average≤ 4.2 kg/dJun–SepD026
Nitrogen, ammonia total [as N]monthly average≤ 14 kg/dOct, NovD026
Nitrogen, ammonia total [as N]monthly average≤ 19 kg/dApr, MayD026
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD026
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD026
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD026
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD026
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD026
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD026
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD026
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD026
Chlorine, total residualdaily maximum≤ .038 mg/LApr–OctD026
Solids, total dissolvedmonthly averagereport only (mg/L)Mar, SepD026
Mercury, dissolved [as Hg]monthly averagereport only (ng/L)May, SepD026
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)May, SepD026
Mercury, total [as Hg]monthly average≤ 9.7 ng/LMay, SepD026
Mercury, total [as Hg]daily maximum≤ 16.8 ng/LMay, SepD026
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall yearD026
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall yearD026
BOD, carbonaceous [5 day, 20 C]monthly average≤ 26.3 kg/dall yearD026
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 42.1 kg/dall yearD026
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD026
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD026
Precipitation, total defined period/inmonthly totalreport only (in)all yearS027
pHmonthly minimumreport only (SU)all yearS027
pHmonthly maximumreport only (SU)all yearS027
Solids, total suspendedmonthly averagereport only (mg/L)all yearS027
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS027
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS027
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS027
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS027
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS027
Mercury, total [as Hg]monthly averagereport only (ng/L)May, SepS027
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS027
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS027

How strict are these limits?

Cited limits by parameter: Minnesota'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/MN0021261 · MCP: https://passage-data.com/mcp