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Melrose city of

Sewage treatment plant, major discharger, Melrose, Minnesota. NPDES permit MN0020290 expired Apr 30, 2026; its limits still apply. Last 12 months: over a limit 2 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D065 form A1 monthly (37 values), outfall D065 form A2 monthly (1 value), outfall D065 form A3 monthly (1 value), outfall S068 form A1 monthly (11 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 38 reports late

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

Period endingParameterReportedLimitOver by
August 2026Nitrogen, ammonia total [as N], monthly average298.8≤ 13.6 kg/d2097%
August 2026Nitrogen, ammonia total [as N], monthly average33.1≤ 1.2 mg/L2658%

Limits in force (61)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)all yearD065
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, DecD065
Oxygen, dissolved [DO]daily minimum≥ 6 mg/LJun–SepD065
pHmonthly minimum≥ 6 SUall yearD065
pHmonthly maximum≤ 9 SUall yearD065
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)all yearD065
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD065
Solids, total suspendedmonthly maximumreport only (mg/L)May, SepD065
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD065
Solids, total suspendedmonthly average≤ 340 kg/dall yearD065
Solids, total suspendedmaximum weekly average≤ 510 kg/dall yearD065
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearD065
Nitrogen, ammonia total [as N]monthly average≤ 1.2 mg/LJun–SepD065
Nitrogen, ammonia total [as N]monthly average≤ 3.7 mg/LApr, MayD065
Nitrogen, ammonia total [as N]monthly average≤ 14 mg/LJan, Feb, Mar, DecD065
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LOct, NovD065
Nitrogen, ammonia total [as N]monthly average≤ 13.6 kg/dJun–SepD065
Nitrogen, ammonia total [as N]monthly average≤ 42 kg/dApr, MayD065
Nitrogen, ammonia total [as N]monthly average≤ 158.8 kg/dJan, Feb, Mar, DecD065
Nitrogen, ammonia total [as N]monthly average≤ 35.2 kg/dOct, NovD065
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD065
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD065
Phosphorus, total [as P]monthly average≤ 1 mg/Lall yearD065
Phosphorus, total [as P]annual total≤ 3316 kg/yrall yearD065
Calcium, total [as Ca]monthly maximumreport only (mg/L)all yearD065
Magnesium, total [as Mg]monthly maximumreport only (mg/L)all yearD065
Sodium, total [as Na]monthly maximumreport only (mg/L)all yearD065
Potassium, total [as K]monthly maximumreport only (mg/L)all yearD065
Chloride [as Cl]daily maximum≤ 894 mg/Lall yearD065
Chloride [as Cl]daily maximum≤ 10151 kg/dall yearD065
Sulfate, total [as SO4]monthly maximumreport only (mg/L)all yearD065
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)all yearD065
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLApr–OctD065
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD065
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD065
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD065
Chlorine, total residualdaily maximum≤ .038 mg/Lall yearD065
Solids, total dissolvedmonthly maximumreport only (mg/L)all yearD065
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)May, SepD065
Mercury, total [as Hg]monthly maximumreport only (ng/L)May, SepD065
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, DecD065
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJun–SepD065
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 25 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, DecD065
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/LJun–SepD065
BOD, carbonaceous [5 day, 20 C]monthly average≤ 170 kg/dJan, Feb, Mar, Apr, May, Oct, Nov, DecD065
BOD, carbonaceous [5 day, 20 C]monthly average≤ 113 kg/dJun–SepD065
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 284 kg/dJan, Feb, Mar, Apr, May, Oct, Nov, DecD065
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 170 kg/dJun–SepD065
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD065
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD065
Precipitation, total defined period/inmonthly totalreport only (in)all yearS068
pHmonthly minimumreport only (SU)all yearS068
pHmonthly maximumreport only (SU)all yearS068
Solids, total suspendedmonthly averagereport only (mg/L)all yearS068
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS068
Nitrogen, total [as N]monthly averagereport only (mg/L)all yearS068
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearS068
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearS068
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS068
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS068
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS068

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/MN0020290 · MCP: https://passage-data.com/mcp