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SD Soybean Processors - Miller Facility

Soybean Oil Mills, Saint Lawrence, South Dakota. NPDES permit SD0028644 expired Aug 31, 2026; its limits still apply. Last 12 months: no values over a limit, 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (25 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 12 reports late

Limits in force (25)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheit30-day averagereport only (deg F) (alert, not enforceable)all year
Temperature, water deg. fahrenheitdaily maximum≤ 80 deg F (alert, not enforceable)all year
Temperature, water deg. fahrenheit30-day averagereport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximum≤ 80 deg Fall year
Flow rate30-day averagereport only (gal/d)all year
Flow ratedaily maximumreport only (gal/d)all year
Conductivity30-day average≤ 2500 umho/cmall year
Conductivitydaily maximum≤ 4375 umho/cmall year
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Oil and grease, hexane extr methoddaily maximum≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]30-day averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, nitrate total [as N]30-day averagereport only (mg/L)all year
Nitrogen, nitrate total [as N]daily maximumreport only (mg/L)all year
Floating solids, waste or visible foam-visualvalue≤ 0 abst=0;prst=1all year
Flow, totalmonthly totalreport only (gal)all year
Solids, total dissolved30-day average≤ 2500 mg/Lall year
Solids, total dissolveddaily maximum≤ 4375 mg/Lall year
Oil and grease visualvalue≤ 0 abst=0;prst=1all year
Discharge event observation [Visual Monitoring]value≤ 0 abst=0;prst=1 (alert, not enforceable)all year

How strict are these limits?

Cited limits by parameter: South Dakota's rules and the federal ones.

Same industry: the 7 Food and Kindred Products permits in South Dakota.

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/SD0028644 · MCP: https://passage-data.com/mcp