Passage Data · Check a report · Use it from your AI

Lonsdale city of

Sewage treatment plant, Lonsdale, Minnesota. NPDES permit MN0031241, in force until Jul 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D011 form A1 monthly (33 values), outfall D011 form A3 monthly (2 values), outfall S015 form A1 monthly (14 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 37 reports late

Limits in force (52)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)Mar, SepD011
Oxygen, dissolved [DO]monthly minimumreport only (mg/L)all yearD011
pHmonthly minimum≥ 6 SUall yearD011
pHmonthly maximum≤ 9 SUall yearD011
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)Mar, SepD011
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD011
Solids, total suspendedmonthly maximumreport only (mg/L)JulD011
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD011
Solids, total suspendedmonthly average≤ 78 kg/dall yearD011
Solids, total suspendedmaximum weekly average≤ 117 kg/dall yearD011
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD011
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, SepD011
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD011
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecD011
Phosphorus, total [as P]12-month average≤ 1 mg/Lall yearD011
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD011
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD011
Phosphorus, total [as P]annual total≤ 285 kg/yrall yearD011
Calcium, total [as Ca]monthly maximumreport only (mg/L)Mar, SepD011
Magnesium, total [as Mg]monthly maximumreport only (mg/L)Mar, SepD011
Sodium, total [as Na]monthly maximumreport only (mg/L)Mar, SepD011
Potassium, total [as K]monthly maximumreport only (mg/L)Mar, SepD011
Chloride [as Cl]monthly average≤ 550 mg/Lall yearD011
Sulfate, total [as SO4]monthly maximumreport only (mg/L)Mar, SepD011
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)Mar, SepD011
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLMay–OctD011
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD011
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD011
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD011
Solids, total dissolvedmonthly maximumreport only (mg/L)Mar, SepD011
Mercury, dissolved [as Hg]monthly maximumreport only (ng/L)JulD011
Mercury, total [as Hg]monthly maximumreport only (ng/L)JulD011
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/Lall yearD011
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 25 mg/Lall yearD011
BOD, carbonaceous [5 day, 20 C]monthly average≤ 39 kg/dall yearD011
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 65 kg/dall yearD011
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD011
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD011
Precipitation, total defined period/inmonthly totalreport only (in)all yearS015
pHmonthly minimumreport only (SU)all yearS015
pHmonthly maximumreport only (SU)all yearS015
Solids, total suspendedmonthly averagereport only (mg/L)all yearS015
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS015
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS015
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS015
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, DecS015
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS015
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearS015
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearS015
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearS015
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS015
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS015

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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MN0031241 · MCP: https://passage-data.com/mcp