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Industrial or other facility, Chestertown, Maryland. NPDES permit MD0070751, in force until Oct 31, 2027. Last 12 months: over a limit 4 times (last February 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Copper, total [as Cu], daily maximum | 53.8 ug/L | ≤ 13 ug/L | 314% |
| December 2025 | Copper, total [as Cu], maximum monthly average | 53.8 ug/L | ≤ 9 ug/L | 498% |
| February 2026 | Copper, total [as Cu], daily maximum | 44.5 ug/L | ≤ 13 ug/L | 242% |
| February 2026 | Copper, total [as Cu], maximum monthly average | 22.95 ug/L | ≤ 9 ug/L | 155% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, total [as N] | monthly average | report only (lb/qtr) | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, total [as N] | cumulative total | report only (lb/yr) | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 001 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | maximum monthly average | ≤ 9 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 13 ug/L | all year | 001 |
| Iron, total [as Fe] | maximum monthly average | ≤ 2 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 3 mg/L | all year | 001 |
| Dichloromethane | daily maximum | report only (ug/L) | all year | 001 |
| Carbon tetrachloride | daily maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichloroethane | daily maximum | report only (ug/L) | all year | 001 |
| Bromoform | daily maximum | report only (ug/L) | all year | 001 |
| Dibromochloromethane | daily maximum | report only (ug/L) | all year | 001 |
| Chloroform | daily maximum | report only (ug/L) | all year | 001 |
| Toluene | daily maximum | report only (ug/L) | all year | 001 |
| Benzene | daily maximum | report only (ug/L) | all year | 001 |
| Chlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| Ethylbenzene | daily maximum | report only (ug/L) | all year | 001 |
| 1,1,1-Trichloroethane | daily maximum | report only (ug/L) | all year | 001 |
| 1,1,2-Trichloroethane | daily maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichloropropane | daily maximum | report only (ug/L) | all year | 001 |
| trans-1,2-Dichloroethylene | daily maximum | report only (ug/L) | all year | 001 |
| 1,4-Dichlorobenzene | daily maximum | report only (ug/L) | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ 22 ug/L | Dec | 001 |
| Vinyl chloride | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 001 |
| Bromodichloromethane | daily maximum | report only (ug/L) | all year | 001 |
| 1,1-Dichloroethene | daily maximum | report only (ug/L) | all year | 001 |
| Hydrogen sulfide | daily maximum | report only (mg/L) | Dec | 001 |
| Organics, tot purgeables [Method 624] | daily maximum | ≤ 100 ug/L | all year | 001 |
| Tetrachloroethene | daily maximum | report only (ug/L) | all year | 001 |
| Trichloroethene | daily maximum | report only (ug/L) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 101 |
| pH | maximum | ≤ 8.5 SU | all year | 101 |
| pH | minimum | report only (SU) | all year | 101 |
| pH | maximum | report only (SU) | all year | 101 |
| pH | minimum | report only (SU) | all year | 101 |
| pH | maximum | report only (SU) | all year | 101 |
| Nitrogen, total [as N] | quarterly total | report only (mg/L) | Mar, Jun, Sep, Dec | 101 |
| Nitrogen, total [as N] | cumulative total | report only (lb/yr) | Mar, Jun, Sep, Dec | 101 |
| Nitrogen, total [as N] | monthly average | report only (lb/qtr) | Mar, Jun, Sep, Dec | 101 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 101 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 101 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 101 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 101 |
| Copper, total [as Cu] | maximum monthly average | ≤ 9 ug/L | all year | 101 |
| Copper, total [as Cu] | daily maximum | ≤ 13 ug/L | all year | 101 |
| Iron, total [as Fe] | maximum monthly average | ≤ 2 mg/L | all year | 101 |
| Iron, total [as Fe] | daily maximum | ≤ 3 mg/L | all year | 101 |
| Dichloromethane | daily maximum | report only (ug/L) | all year | 101 |
| Carbon tetrachloride | daily maximum | report only (ug/L) | all year | 101 |
| 1,2-Dichloroethane | daily maximum | report only (ug/L) | all year | 101 |
| Bromoform | daily maximum | report only (ug/L) | all year | 101 |
| Dibromochloromethane | daily maximum | report only (ug/L) | all year | 101 |
| Chloroform | daily maximum | report only (ug/L) | all year | 101 |
| Toluene | daily maximum | report only (ug/L) | all year | 101 |
| Benzene | daily maximum | report only (ug/L) | all year | 101 |
| Chlorobenzene | daily maximum | report only (ug/L) | all year | 101 |
| Ethylbenzene | daily maximum | report only (ug/L) | all year | 101 |
| 1,1-Dichloroethane | daily maximum | report only (ug/L) | all year | 101 |
| 1,1,1-Trichloroethane | daily maximum | report only (ug/L) | all year | 101 |
| 1,1,2-Trichloroethane | daily maximum | report only (ug/L) | all year | 101 |
| 1,2-Dichlorobenzene | daily maximum | report only (ug/L) | all year | 101 |
| 1,2-Dichloropropane | daily maximum | report only (ug/L) | all year | 101 |
| 1,4-Dichlorobenzene | daily maximum | report only (ug/L) | all year | 101 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ 22 ug/L | Dec | 101 |
| Vinyl chloride | daily maximum | report only (ug/L) | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 101 |
| Bromodichloromethane | daily maximum | report only (ug/L) | all year | 101 |
| 1,1-Dichloroethene | daily maximum | report only (ug/L) | all year | 101 |
| Hydrogen sulfide | daily maximum | report only (mg/L) | Dec | 101 |
| Organics, tot purgeables [Method 624] | daily maximum | ≤ 100 ug/L | all year | 101 |
| trans-1,2-Dichloroethene | daily maximum | ≤ 100 ug/L | all year | 101 |
| Tetrachloroethene | daily maximum | report only (ug/L) | all year | 101 |
| Trichloroethene | daily maximum | report only (ug/L) | all year | 101 |
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/MD0070751 · MCP: https://passage-data.com/mcp