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USFS - Boxelder JCCCC

Federal facility (Sewerage Systems), Nemo, South Dakota. NPDES permit SD0020834, in force until May 31, 2031. Last 12 months: over a limit 20 times (last July 2026), 7 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (26 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 2 required values missing, 2 of 12 reports late

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

All 20 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, daily maximum27 mg/L≤ 17.5 mg/L54%
October 2025Nitrogen, ammonia total [as N], daily maximum6.25 mg/L≤ 4.6 mg/L36%
January 2026Nitrogen, ammonia total [as N], 30-day average5.14 mg/L≤ 4.9 mg/L5%
February 2026BOD, 5-day, 20 deg. C, 30-day average19.2 mg/L≤ 10 mg/L92%
February 2026BOD, 5-day, 20 deg. C, daily maximum35 mg/L≤ 17.5 mg/L100%
February 2026Nitrogen, ammonia total [as N], 30-day average7.3 mg/L≤ 4.7 mg/L55%
February 2026Nitrogen, ammonia total [as N], daily maximum11 mg/L≤ 9.4 mg/L17%
February 2026Solids, total suspended, daily maximum20 mg/L≤ 17.5 mg/L14%
March 2026Nitrogen, ammonia total [as N], 30-day average7.85 mg/L≤ 4.6 mg/L71%
March 2026Nitrogen, ammonia total [as N], daily maximum12.5 mg/L≤ 8.3 mg/L51%
April 2026Nitrogen, ammonia total [as N], 30-day average17.5 mg/L≤ 4.6 mg/L280%
April 2026Nitrogen, ammonia total [as N], daily maximum25.4 mg/L≤ 8.3 mg/L206%
May 2026E. coli, colony forming units [CFU], 30-day geometric mean790 #/100mL≤ 630 #/100mL25%
May 2026E. coli, colony forming units [CFU], daily maximum2420 #/100mL≤ 1178 #/100mL105%
May 2026Nitrogen, ammonia total [as N], 30-day average18 mg/L≤ 4.6 mg/L291%
May 2026Nitrogen, ammonia total [as N], daily maximum25.7 mg/L≤ 8.3 mg/L210%
June 2026Nitrogen, ammonia total [as N], 30-day average9 mg/L≤ 2.7 mg/L233%
June 2026Nitrogen, ammonia total [as N], daily maximum13 mg/L≤ 5.3 mg/L145%
July 2026Nitrogen, ammonia total [as N], 30-day average9.8 mg/L≤ 2.7 mg/L263%
July 2026Nitrogen, ammonia total [as N], daily maximum12.5 mg/L≤ 5.3 mg/L136%

Limits in force (40)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmaximum 7-day averagereport only (deg F) (alert, not enforceable)all year
Temperature, water deg. fahrenheitdaily maximum≤ 75.2 deg F (alert, not enforceable)all year
Temperature, water deg. fahrenheitmaximum 7-day averagereport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Temperature, water deg. fahrenheitmaximum 7-day averagereport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year
Flow rate30-day averagereport only (MGD)all year
Flow ratedaily maximumreport only (MGD)all year
Oxygen, dissolved [DO]daily minimum≥ 7 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 17.5 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≤ 10 mg/Lall year
Solids, total suspendeddaily maximum≤ 17.5 mg/Lall year
Solids, total suspended30-day averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]30-day average≤ 2.7 mg/LJun, Jul
Nitrogen, ammonia total [as N]30-day average≤ 4.6 mg/LMar–May
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LOct, Nov
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 5.3 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.9 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 2.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4.7 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 mg/LJun, Jul
Nitrogen, ammonia total [as N]daily maximum≤ 8.3 mg/LMar–May
Nitrogen, ammonia total [as N]daily maximum≤ 4.6 mg/LOct, Nov
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 9.7 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 9.7 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 9.4 mg/LFeb
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Temp. diff. between up/down stream deg. Fdaily maximum≤ 2 deg Fall year
E. coli, colony forming units [CFU]30-day geometric mean≤ 630 #/100mLall year
E. coli, colony forming units [CFU]daily maximum≤ 1178 #/100mLall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all 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/SD0020834 · MCP: https://passage-data.com/mcp