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Federal facility (Space Research And Technology), Greenbelt, Maryland. NPDES permit MD0067482 expired Jun 30, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | ≤ 90 deg F | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 8.5 SU | all year | 001 |
| Hardness, total [as CaCO3] | quarterly average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, dissolved [as Cu] | quarterly average | report only (mg/L) | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | quarterly average | ≤ 26.3 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 42.4 mg/L | all year | 001 |
| Chlorine, total residual | quarterly average | ≤ .1 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year | 001 |
| Flow | quarterly average | report only (gal/d) | all year | 001 |
| Flow | daily maximum | report only (gal/d) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 90 deg F | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | daily maximum | ≤ 8.5 SU | all year | 004 |
| Hardness, total [as CaCO3] | quarterly average | report only (mg/L) | all year | 004 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 004 |
| Copper, dissolved [as Cu] | quarterly average | report only (mg/L) | all year | 004 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | 004 |
| Copper, total [as Cu] | quarterly average | ≤ 36.4 mg/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | ≤ 58.6 mg/L | all year | 004 |
| Chlorine, total residual | quarterly average | ≤ .1 mg/L | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ .1 mg/L | all year | 004 |
| Flow | quarterly average | report only (gal/d) | all year | 004 |
| Flow | daily maximum | report only (gal/d) | all year | 004 |
Cited limits by parameter: Maryland'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/MD0067482 · MCP: https://passage-data.com/mcp