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Residential Construction, Silver Spring, Maryland. NPDES permit MD0071790, in force until May 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year |
| Dichlorobromomethane | daily maximum | report only (ug/L) | all year |
| Dichlorobromomethane | daily maximum | report only (ug/L) | all year |
| Carbon tetrachloride | daily maximum | report only (ug/L) | all year |
| Carbon tetrachloride | daily maximum | report only (ug/L) | all year |
| Bromoform | daily maximum | report only (ug/L) | all year |
| Bromoform | daily maximum | report only (ug/L) | all year |
| Dibromochloromethane | daily maximum | report only (ug/kg) | all year |
| Dibromochloromethane | daily maximum | report only (ug/kg) | all year |
| Chloroform | daily maximum | report only (ug/L) | all year |
| Chloroform | daily maximum | report only (ug/L) | all year |
| Toluene | daily maximum | report only (ug/L) | all year |
| Toluene | daily maximum | report only (ug/L) | all year |
| Benzene | daily maximum | report only (ug/L) | all year |
| Benzene | daily maximum | report only (ug/L) | all year |
| Chlorobenzene | daily maximum | report only (ug/L) | all year |
| Chlorobenzene | daily maximum | report only (ug/L) | all year |
| Chloroethane, total weight | daily maximum | report only (ug/L) | all year |
| Chloroethane, total weight | daily maximum | report only (ug/L) | all year |
| Ethylbenzene | daily maximum | report only (ug/L) | all year |
| Ethylbenzene | daily maximum | report only (ug/L) | all year |
| Methyl bromide [Bromomethane] | daily maximum | report only (ug/L) | all year |
| Methyl bromide [Bromomethane] | daily maximum | report only (ug/L) | all year |
| Methyl chloride [Chloromethane] | daily maximum | report only (ug/L) | all year |
| Methyl chloride [Chloromethane] | daily maximum | report only (ug/L) | all year |
| Methylene chloride | daily maximum | report only (ug/L) | all year |
| Methylene chloride | daily maximum | report only (ug/L) | all year |
| Tetrachloroethylene | daily maximum | report only (ug/L) | all year |
| Tetrachloroethylene | daily maximum | report only (ug/L) | all year |
| Trichlorofluoromethane | daily maximum | report only (ug/L) | all year |
| Trichlorofluoromethane | daily maximum | report only (ug/L) | all year |
| 1,1-Dichloroethane | daily maximum | report only (ug/L) | all year |
| 1,1-Dichloroethane | daily maximum | report only (ug/L) | all year |
| 1,1-Dichloroethylene | daily maximum | report only (ug/L) | all year |
| 1,1-Dichloroethylene | daily maximum | report only (ug/L) | all year |
| 1,1,1-Trichloroethane | daily maximum | report only (ug/L) | all year |
| 1,1,1-Trichloroethane | daily maximum | report only (ug/L) | all year |
| 1,1,2-Trichloroethane | daily maximum | report only (ug/L) | all year |
| 1,1,2-Trichloroethane | daily maximum | report only (ug/L) | all year |
| 1,1,2,2-Tetrachloroethane | daily maximum | report only (ug/L) | all year |
| 1,1,2,2-Tetrachloroethane | daily maximum | report only (ug/L) | all year |
| 1,2-Dichloroethane, total weight | daily maximum | report only (ug/L) | all year |
| 1,2-Dichloroethane, total weight | daily maximum | report only (ug/L) | all year |
| 1,2-Dichlorobenzene | daily maximum | report only (ug/L) | all year |
| 1,2-Dichlorobenzene | daily maximum | report only (ug/L) | all year |
| 1,2-Dichloropropane | daily maximum | report only (ug/L) | all year |
| 1,2-Dichloropropane | daily maximum | report only (ug/L) | all year |
| trans-1,2-Dichloroethylene | daily maximum | report only (ug/L) | all year |
| trans-1,2-Dichloroethylene | daily maximum | report only (ug/L) | all year |
| 1,3-Dichlorobenzene | daily maximum | report only (ug/L) | all year |
| 1,3-Dichlorobenzene | daily maximum | report only (ug/L) | all year |
| 1,4-Dichlorobenzene | daily maximum | report only (ug/L) | all year |
| 1,4-Dichlorobenzene | daily maximum | report only (ug/L) | all year |
| 2-Chloroethyl vinyl ether, [mixed] | daily maximum | report only (ug/L) | all year |
| 2-Chloroethyl vinyl ether, [mixed] | daily maximum | report only (ug/L) | all year |
| trans-1,3-Dichloropropene | daily maximum | report only (ug/L) | all year |
| trans-1,3-Dichloropropene | daily maximum | report only (ug/L) | all year |
| cis-1,3-Dichloropropene | daily maximum | report only (ug/L) | all year |
| cis-1,3-Dichloropropene | daily maximum | report only (ug/L) | all year |
| Vinyl chloride | daily maximum | report only (ug/L) | all year |
| Vinyl chloride | daily maximum | report only (ug/L) | all year |
| Trichloroethylene | daily maximum | report only (ug/L) | all year |
| Trichloroethylene | daily maximum | report only (ug/L) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year |
| Volatile Organic Compound [VOC] | daily maximum | ≤ 100 ug/L | all year |
| Volatile Organic Compound [VOC] | daily maximum | ≤ 100 ug/L | all year |
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/MD0071790 · MCP: https://passage-data.com/mcp