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Federal facility (Space Research And Technology), Huntsville, Alabama. NPDES permit AL0000221 expired Aug 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | report only (SU) | all year | 008 |
| pH | daily maximum | report only (SU) | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| pH | daily minimum | ≥ 6 SU | all year | 012 |
| pH | daily minimum | report only (SU) | all year | 012 |
| pH | daily maximum | ≤ 8.5 SU | all year | 012 |
| pH | daily maximum | report only (SU) | all year | 012 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 012 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 012 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 012 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 012 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 012 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 012 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 012 |
| pH | daily minimum | report only (SU) | all year | 018 |
| pH | daily maximum | report only (SU) | all year | 018 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 018 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 018 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 018 |
| pH | daily minimum | ≥ 6 SU | all year | 019 |
| pH | daily minimum | report only (SU) | all year | 019 |
| pH | daily maximum | ≤ 8.5 SU | all year | 019 |
| pH | daily maximum | report only (SU) | all year | 019 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 019 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 019 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 019 |
| Trichloroethylene | monthly average | ≤ 17.5 ug/L | all year | 019 |
| Trichloroethylene | daily maximum | report only (ug/L) | all year | 019 |
| Trichloroethylene | daily maximum | report only (ug/L) | all year | 019 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 019 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 019 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 019 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 019 |
| pH | daily minimum | report only (SU) | all year | 022 |
| pH | daily maximum | report only (SU) | all year | 022 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 022 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 022 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 022 |
| pH | daily minimum | report only (SU) | all year | 033 |
| pH | daily maximum | report only (SU) | all year | 033 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 033 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 033 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 033 |
Cited limits by parameter: Alabama'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/AL0000221 · MCP: https://passage-data.com/mcp