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Vermillion, City of

Sewage treatment plant, major discharger, Vermillion, South Dakota. NPDES permit SD0020061 expired Sep 30, 2017; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (25 values), form MA yearly (36 values), form W quarterly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 2 required values missing, 1 of 17 reports late

Limits in force (85)

ParameterStatisticLimitMonths
Temperature, water deg. centigrade30-day averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Flow rate30-day averagereport only (MGD)all year
Flow ratedaily maximumreport only (MGD)all year
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum 7-day average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year
Solids, total suspended30-day averagereport only (mg/L)all year
Oil and grease, hexane extr methoddaily maximum≤ 1 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, ammonia total [as N]30-day average≤ 33.4 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 46.7 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 73.4 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 76.7 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 63.4 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 66.7 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 63.4 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 70.1 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 83.4 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 56.7 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 56.7 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 73.4 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 116.8 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 133.4 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 86.7 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 86.7 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 86.7 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 86.7 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 86.7 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 170.1 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 150.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 100.1 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 116.8 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 116.8 lb/dFeb
Cyanide, weak acid, dissociablevaluereport only (mg/L)all year
Cyanide, weak acid, dissociablevaluereport only (mg/L)all year
Cyanide, total [as CN]valuereport only (mg/L)all year
Cyanide, total [as CN]valuereport only (mg/L)all year
Hardness, total [as CaCO3]valuereport only (mg/L)all year
Hardness, total [as CaCO3]valuereport only (mg/L)all year
Arsenic, total recoverablevaluereport only (mg/L)all year
Arsenic, total recoverablevaluereport only (mg/L)all year
Selenium, total recoverablevaluereport only (mg/L)all year
Selenium, total recoverablevaluereport only (mg/L)all year
Thallium, total recoverablevaluereport only (mg/L)all year
Thallium, total recoverablevaluereport only (mg/L)all year
Beryllium, total recoverable [as Be]valuereport only (mg/L)all year
Beryllium, total recoverable [as Be]valuereport only (mg/L)all year
Nickel, total recoverablevaluereport only (mg/L)all year
Nickel, total recoverablevaluereport only (mg/L)all year
Silver total recoverablevaluereport only (mg/L)all year
Silver total recoverablevaluereport only (mg/L)all year
Zinc, total recoverablevaluereport only (mg/L)all year
Zinc, total recoverablevaluereport only (mg/L)all year
Cadmium, total recoverablevaluereport only (mg/L)all year
Cadmium, total recoverablevaluereport only (mg/L)all year
Lead, total recoverablevaluereport only (mg/L)all year
Lead, total recoverablevaluereport only (mg/L)all year
Chromium, total recoverablevaluereport only (mg/L)all year
Chromium, total recoverablevaluereport only (mg/L)all year
Copper, total recoverablevaluereport only (mg/L)all year
Copper, total recoverablevaluereport only (mg/L)all year
Molybdenum, total recoverablevaluereport only (mg/L)all year
Molybdenum, total recoverablevaluereport only (mg/L)all year
Antimony, total recoverablevaluereport only (mg/L)all year
Antimony, total recoverablevaluereport only (mg/L)all year
Phenolsvaluereport only (mg/L)all year
Phenolsvaluereport only (mg/L)all year
E. coli, colony forming units [CFU]30-day geometric mean≤ 630 #/100mLMay–Sep
E. coli, colony forming units [CFU]daily maximum≤ 1178 #/100mLMay–Sep
Mercury, total [as Hg]valuereport only (mg/L)all year
Mercury, total [as Hg]valuereport only (mg/L)all year
Coliform, total general30-day geometric mean≤ 5000 #/100mLall year
Coliform, total generaldaily maximum≤ 20000 #/100mLall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all year
Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubiadaily maximum≤ 0 pass=0;fail=1all year
Pass/Fail Static Renewal 96Hr Acute Pimephales Promelasdaily maximum≤ 0 pass=0;fail=1all year

How strict are these limits?

Cited limits by parameter: South Dakota'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/SD0020061 · MCP: https://passage-data.com/mcp