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Water Supply, North Sioux City, South Dakota. NPDES permit SD0028011, in force until Mar 31, 2027. Last 12 months: no values over a limit, 4 of 26 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Flow rate | 30-day average | report only (MGD) | all year | 001 |
| Flow rate | daily maximum | report only (MGD) | all year | 001 |
| Conductivity | 30-day average | ≤ 5245 umho/cm | all year | 001 |
| Conductivity | daily maximum | ≤ 9178 umho/cm | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Alkalinity, total [as CaCO3] | 30-day average | ≤ 1833 mg/L | all year | 001 |
| Alkalinity, total [as CaCO3] | daily maximum | ≤ 3208 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | 30-day average | ≤ 2336 mg/L | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | ≤ 4088 mg/L | all year | 001 |
| Fluoride, total [as F] | daily maximum | ≤ 5.8 mg/L | all year | 001 |
| Radium 226, total | rolling average | ≤ 25 pCi/L | all year | 001 |
| Radium 226, total | daily maximum | ≤ 75 pCi/L | all year | 001 |
| Floating solids, waste or visible foam-visual | daily maximum | report only (abst=0;prst=1) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 001 |
| Solids, total dissolved | 30-day average | ≤ 3254 mg/L | all year | 001 |
| Solids, total dissolved | daily maximum | ≤ 5695 mg/L | all year | 001 |
| Temperature, water deg. centigrade | 30-day average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 002 |
| Flow rate | 30-day average | report only (MGD) | all year | 002 |
| Flow rate | daily maximum | report only (MGD) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Floating solids, waste or visible foam-visual | daily maximum | report only (abst=0;prst=1) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 002 |
| Flow, total | monthly total | report only (Mgal) | all year | 002 |
| Duration of discharge | monthly total | report only (d) | all year | 002 |
Cited limits by parameter: South Dakota's rules and the federal ones.
Same industry: the 4 Water Supply permits in South Dakota.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/SD0028011 · MCP: https://passage-data.com/mcp