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Federal facility (Sewerage Systems), major discharger, Ellsworth Air Force Base, South Dakota. NPDES permit SD0000281 expired Dec 31, 2014; its limits still apply. Last 12 months: no values over a limit, 12 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Flow rate | 30-day average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9.5 SU | all year | 001 |
| Benzene, ethylbenzene, toluene, xylene combination | 30-day average | report only (mg/L) | all year | 001 |
| Benzene, ethylbenzene, toluene, xylene combination | daily maximum | report only (mg/L) | all year | 001 |
| Naphthalene | 30-day average | report only (mg/L) | all year | 001 |
| Naphthalene | daily maximum | report only (mg/L) | all year | 001 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Hydrocarbons, petroleum | daily maximum | ≤ 10 mg/L | all year | 001 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Flow rate | 30-day average | report only (MGD) | all year | 002 |
| Flow rate | daily maximum | report only (MGD) | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 002 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9.5 SU | all year | 002 |
| Benzene, ethylbenzene, toluene, xylene combination | 30-day average | report only (mg/L) | all year | 002 |
| Benzene, ethylbenzene, toluene, xylene combination | daily maximum | report only (mg/L) | all year | 002 |
| Naphthalene | 30-day average | report only (mg/L) | all year | 002 |
| Naphthalene | daily maximum | report only (mg/L) | all year | 002 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| Hydrocarbons, petroleum | daily maximum | ≤ 10 mg/L | all year | 002 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| Flow rate | 30-day average | report only (MGD) | all year | 003 |
| Flow rate | daily maximum | report only (MGD) | all year | 003 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Oct, Nov, Dec | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9.5 SU | all year | 003 |
| Benzene, ethylbenzene, toluene, xylene combination | 30-day average | report only (mg/L) | all year | 003 |
| Benzene, ethylbenzene, toluene, xylene combination | daily maximum | report only (mg/L) | all year | 003 |
| Naphthalene | 30-day average | report only (mg/L) | all year | 003 |
| Naphthalene | daily maximum | report only (mg/L) | all year | 003 |
| Floating solids, waste or visible foam-visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 003 |
| Hydrocarbons, petroleum | daily maximum | ≤ 10 mg/L | all year | 003 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 003 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 005 |
| Flow rate | 30-day average | report only (MGD) | all year | 005 |
| Flow rate | daily maximum | report only (MGD) | all year | 005 |
| Conductivity | 30-day average | report only (umho/cm) | all year | 005 |
| Conductivity | daily maximum | report only (umho/cm) | all year | 005 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 005 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 005 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 005 |
| pH | daily minimum | ≥ 6 SU | all year | 005 |
| pH | daily maximum | ≤ 9 SU | all year | 005 |
| pH | daily minimum | report only (SU) | all year | 005 |
| pH | daily maximum | report only (SU) | all year | 005 |
| Alkalinity, total [as CaCO3] | 30-day average | report only (mg/L) | all year | 005 |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 005 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 005 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 005 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.3 mg/L | Aug | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 mg/L | Sep | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.5 mg/L | Oct | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5 mg/L | Nov | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.5 mg/L | Jan | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Feb | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Mar | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.5 mg/L | Apr | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.5 mg/L | May | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3 mg/L | Jun | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2 mg/L | Jul | 005 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Dec | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20 mg/L | Aug | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Sep | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Oct | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Nov | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8 mg/L | Jan | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10 mg/L | Feb | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Mar | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Apr | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | May | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Jun | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Jul | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11 mg/L | Dec | 005 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 005 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Cyanide, weak acid, dissociable | instantaneous maximum | report only (mg/L) | all year | 005 |
| Cyanide, weak acid, dissociable | instantaneous maximum | report only (mg/L) | all year | 005 |
| Cyanide, total [as CN] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Cyanide, total [as CN] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Arsenic, total [as As] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Arsenic, total [as As] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Beryllium, total [as Be] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Beryllium, total [as Be] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Cadmium, total [as Cd] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Cadmium, total [as Cd] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Chromium, total [as Cr] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Chromium, total [as Cr] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Copper, total [as Cu] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Copper, total [as Cu] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Lead, total [as Pb] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Lead, total [as Pb] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Thallium, total [as Tl] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Thallium, total [as Tl] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Molybdenum, total [as Mo] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Molybdenum, total [as Mo] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Nickel, total [as Ni] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Nickel, total [as Ni] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Silver, total [as Ag] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Silver, total [as Ag] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Zinc, total [as Zn] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Zinc, total [as Zn] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Antimony, total [as Sb] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Antimony, total [as Sb] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Selenium, total [as Se] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Selenium, total [as Se] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Phenols | instantaneous maximum | report only (mg/L) | all year | 005 |
| Phenols | instantaneous maximum | report only (mg/L) | all year | 005 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 005 |
| E. coli, colony forming units [CFU] | 30-day geometric mean | ≤ 630 CFU/100mL | May–Sep | 005 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 1178 CFU/100mL | May–Sep | 005 |
| Mercury, total [as Hg] | instantaneous maximum | report only (mg/L) | all year | 005 |
| Mercury, total [as Hg] | instantaneous maximum | report only (mg/L) | all year | 005 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | report only (mg/L) | all year | 005 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 005 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 005 |
| Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | all year | 005 |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | daily maximum | ≤ 0 pass=0;fail=1 | all year | 005 |
| pH | daily minimum | ≥ 6 SU | all year | 011 |
| pH | daily maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 90 mg/L | all year | 011 |
| Chlorine, total residual | daily maximum | < .05 mg/L | all year | 011 |
| Flow, total | monthly total | report only (gal) | all year | 011 |
| Duration of discharge | monthly total | report only (d) | all year | 011 |
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/SD0000281 · MCP: https://passage-data.com/mcp