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Chamberlain, City of

Sewage treatment plant, Chamberlain, South Dakota. NPDES permit SD0023698 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 2 times (last June 2026), 3 of 19 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (26 values), form EQ quarterly (4 values), form IQ quarterly (3 values), form EA yearly, form IA yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 22 reports late

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

Period endingParameterReportedLimitOver by
May 2026Solids, suspended percent removal, monthly average minimum80 %≥ 85 %33%
June 2026E. coli, colony forming units [CFU], daily maximum249 #/100mL≤ 235 #/100mL6%

Limits in force (53)

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
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≤ 10 mg/Lall year
Nitrogen, total [as N]daily maximumreport only (mg/L)all 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]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Cyanide, free [as free]daily maximumreport only (mg/L)all year
Cyanide, free [as free]daily maximumreport only (mg/L)all year
Cyanide, total [as CN]daily maximumreport only (mg/L)all year
Cyanide, total [as CN]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Arsenic, total recoverabledaily maximumreport only (mg/L)all year
Arsenic, total recoverabledaily maximumreport only (mg/L)all year
Selenite, Total Recoverabledaily maximumreport only (ug/L)all year
Selenite, Total Recoverabledaily maximumreport only (ug/L)all year
Nickel, total recoverabledaily maximumreport only (ug/L)all year
Nickel, total recoverabledaily maximumreport only (ug/L)all year
Zinc, total recoverabledaily maximumreport only (ug/L)all year
Zinc, total recoverabledaily maximumreport only (ug/L)all year
Aluminum, total recoverabledaily maximumreport only (ug/L)all year
Aluminum, total recoverabledaily maximumreport only (ug/L)all year
Cadmium, total recoverabledaily maximumreport only (ug/L)all year
Cadmium, total recoverabledaily maximumreport only (ug/L)all year
Lead, total recoverabledaily maximumreport only (ug/L)all year
Lead, total recoverabledaily maximumreport only (ug/L)all year
Copper, total recoverabledaily maximumreport only (ug/L)all year
Copper, total recoverabledaily maximumreport only (ug/L)all year
Molybdenum, total recoverabledaily maximumreport only (ug/L)all year
Molybdenum, total recoverabledaily maximumreport only (ug/L)all year
Floating solids, waste or visible foam-visualdaily maximumreport only (N=0;Y=1)all year
E. coli, colony forming units [CFU]30-day geometric mean≤ 126 #/100mLMay–Sep
E. coli, colony forming units [CFU]daily maximum≤ 235 #/100mLMay–Sep
Selenate, Total Recoverabledaily maximumreport only (ug/L)all year
Selenate, Total Recoverabledaily maximumreport only (ug/L)all year
Mercury, total [as Hg]daily maximumreport only (ug/L)all year
Mercury, total [as Hg]daily maximumreport only (ug/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

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/SD0023698 · MCP: https://passage-data.com/mcp