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Sewage treatment plant, Callaway, Virginia. NPDES permit VA0088561, in force until Aug 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 210 g/d | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 320 g/d | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| pH | instantaneous minimum | ≥ 6 SU | all year |
| pH | instantaneous maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 210 g/d | all year |
| Solids, total suspended | maximum weekly average | ≤ 320 g/d | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Oil & Grease | monthly average | report only (mg/L) | all year |
| Oil & Grease | maximum weekly average | ≤ 15 mg/L | all year |
| Flow, in conduit or thru treatment plant | monthly average | ≤ .0019 MGD (alert, not enforceable) | all year |
| Flow, in conduit or thru treatment plant | maximum weekly average | report only (MGD) (alert, not enforceable) | all year |
| Chlorine, total residual | monthly average | ≤ 2 mg/L | all year |
| Chlorine, total residual | maximum weekly average | ≤ 2.4 mg/L | all year |
| Chlorine, total residual | instantaneous minimum | ≥ .6 mg/L | all year |
| BOD, percent removal [total] | monthly average minimum | ≥ 85 % | all year |
| E. coli | geometric mean | ≤ 126 #/100mL | all year |
| Suspended solids, total annual | annual total | ≤ 78.9 kg/yr | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
Cited limits by parameter: Virginia'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/VA0088561 · MCP: https://passage-data.com/mcp