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Cement, Hydraulic, Troutville, Virginia. NPDES permit VA0072397, in force until Sep 30, 2031. Last 12 months: no values over a limit, 2 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | instantaneous maximum | ≤ 31 deg C | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Petrol hydrocarbons, total recoverable | monthly average | ≤ 10 mg/L | all year | 001 |
| Petrol hydrocarbons, total recoverable | daily maximum | ≤ 15 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 6.5 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 6.5 ug/L | all year | 001 |
| Temperature, water deg. centigrade | instantaneous maximum | ≤ 31 deg C | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 002 |
| Petrol hydrocarbons, total recoverable | monthly average | ≤ 10 mg/L | all year | 002 |
| Petrol hydrocarbons, total recoverable | daily maximum | ≤ 15 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | monthly average | ≤ 6.5 ug/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 6.5 ug/L | all year | 002 |
| Temperature, water deg. centigrade | instantaneous maximum | ≤ 31 deg C | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 003 |
| Petrol hydrocarbons, total recoverable | monthly average | ≤ 10 mg/L | all year | 003 |
| Petrol hydrocarbons, total recoverable | daily maximum | ≤ 15 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Chlorine, total residual | monthly average | ≤ 6.5 ug/L | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 6.5 ug/L | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 004 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 004 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 004 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 005 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 005 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .99 mg/L | all year | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .99 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 007 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 007 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .66 mg/L | all year | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .66 mg/L | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| pH | minimum | ≥ 6 SU | all year | 009 |
| pH | maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 009 |
| Precipitation volume | daily maximum | report only (Mgal) | all year | 009 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 011 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 011 |
| Precipitation volume | daily maximum | report only (Mgal) | all year | 011 |
Cited limits by parameter: Virginia's rules and the federal ones.
Same industry: the 4 Stone, Clay, Glass and Concrete Products permits in Virginia.
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