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Fountain city of

Sewage treatment plant, Fountain, Minnesota. NPDES permit MN0050873 expired May 31, 2023; its limits still apply. Last 12 months: over a limit 10 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 47 days after each period: outfall D013 form A1 monthly (35 values), outfall S014 form A1 monthly (11 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
14 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, total [as N], monthly average12.8≤ 10 mg/L28%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average1.58≤ 1.17 kg/d35%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average8.42≤ 5 mg/L68%
February 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average23≤ 7.5 mg/L207%
February 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average3.48≤ 1.76 kg/d98%
February 2026Solids, suspended percent removal, monthly average minimum76≥ 85 %60%
March 2026Nitrogen, ammonia total [as N], monthly average10.1≤ 2 mg/L405%
March 2026Nitrogen, ammonia total [as N], monthly average2.09≤ .46 kg/d354%
April 2026Oxygen, dissolved [DO], monthly minimum1.9≥ 7 mg/L73%
May 2026Oxygen, dissolved [DO], monthly minimum1.6≥ 7 mg/L77%

Limits in force (48)

ParameterStatisticLimitMonthsOutfall
Specific conductancemonthly maximumreport only (umho/cm)all yearD013
Oxygen, dissolved [DO]monthly minimum≥ 7 mg/Lall yearD013
pHmonthly minimum≥ 6.5 SUall yearD013
pHmonthly maximum≤ 8.5 SUall yearD013
Bicarbonate ion- [as HCO3]monthly maximumreport only (mg/L)all yearD013
Solids, total suspendedmonthly average≤ 30 mg/Lall yearD013
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall yearD013
Solids, total suspendedmonthly average≤ 7.04 kg/dall yearD013
Solids, total suspendedmaximum weekly average≤ 10.56 kg/dall yearD013
Nitrogen, total [as N]monthly average≤ 10 mg/Lall yearD013
Nitrogen, total [as N]monthly average≤ 2.35 kg/dall yearD013
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LApr–NovD013
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJan, Feb, Mar, DecD013
Nitrogen, ammonia total [as N]monthly average≤ .23 kg/dApr–NovD013
Nitrogen, ammonia total [as N]monthly average≤ .46 kg/dJan, Feb, Mar, DecD013
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearD013
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearD013
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearD013
Phosphorus, total [as P]monthly averagereport only (kg/d)all yearD013
Calcium, total [as Ca]monthly maximumreport only (mg/L)all yearD013
Magnesium, total [as Mg]monthly maximumreport only (mg/L)all yearD013
Sodium, total [as Na]monthly maximumreport only (mg/L)all yearD013
Potassium, total [as K]monthly maximumreport only (mg/L)all yearD013
Chloride [as Cl]monthly maximumreport only (mg/L)all yearD013
Sulfate, dissolved [as SO4]monthly maximumreport only (mg/L)all yearD013
Hardness, Ca Mg Calculated [mg/L as CaCO3]monthly maximumreport only (mg/L)all yearD013
Coliform, fecal MPN + membrane ftl 44.5 Cmonthly geometric mean≤ 200 #/100mLall yearD013
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearD013
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all yearD013
Flow, in conduit or thru treatment plantmonthly totalreport only (Mgal/mo)all yearD013
Solids, total dissolvedmonthly maximumreport only (mg/L)all yearD013
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 mg/Lall yearD013
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 7.5 mg/Lall yearD013
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1.17 kg/dall yearD013
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 1.76 kg/dall yearD013
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all yearD013
Solids, suspended percent removalmonthly average minimum≥ 85 %all yearD013
Precipitation, total defined period/inmonthly totalreport only (in)all yearS014
pHmonthly minimumreport only (SU)all yearS014
pHmonthly maximumreport only (SU)all yearS014
Solids, total suspendedmonthly averagereport only (mg/L)all yearS014
Solids, total suspendedmonthly maximumreport only (mg/L)all yearS014
Nitrogen, total [as N]monthly averagereport only (mg/L)Mar, SepS014
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Mar, SepS014
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, SepS014
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearS014
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearS014
BOD, carbonaceous [5 day, 20 C]monthly maximumreport only (mg/L)all yearS014

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/MN0050873 · MCP: https://passage-data.com/mcp