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Alkalies And Chlorine, New Castle, Delaware. NPDES permit DE0050911 expired Jul 31, 2025; its limits still apply. Last 12 months: over a limit 3 times (last November 2025), 89 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| November 2025 | BOD, 5-day, 20 deg. C, daily maximum | > 3.56 lb/d | ≤ 22.5 lb/d |
| November 2025 | Copper, dissolved [as Cu], daily maximum | > .00131 lb/d | ≤ 1.88 lb/d |
| November 2025 | Solids, total suspended, daily maximum | > 2.97 lb/d | ≤ 113 lb/d |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | daily average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 9 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | daily average | ≤ 15 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 22.5 lb/d | all year | 001 |
| pH | daily minimum | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Solids, total suspended | daily average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | daily average | ≤ 75 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 113 lb/d | all year | 001 |
| Chromium, total [as Cr] | daily average | ≤ .15 mg/L | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ .23 mg/L | all year | 001 |
| Chromium, total [as Cr] | daily average | ≤ .38 lb/d | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ .56 lb/d | all year | 001 |
| Copper, dissolved [as Cu] | daily average | ≤ .5 mg/L | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | ≤ .75 mg/L | all year | 001 |
| Copper, dissolved [as Cu] | daily average | ≤ 1.25 lb/d | all year | 001 |
| Copper, dissolved [as Cu] | daily maximum | ≤ 1.88 lb/d | all year | 001 |
| Iron, total [as Fe] | daily average | ≤ 2 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 3 mg/L | all year | 001 |
| Iron, total [as Fe] | daily average | ≤ 5 lb/d | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 7.5 lb/d | all year | 001 |
| Lead, dissolved [as Pb] | daily average | ≤ .15 mg/L | all year | 001 |
| Lead, dissolved [as Pb] | daily maximum | ≤ .23 mg/L | all year | 001 |
| Lead, dissolved [as Pb] | daily average | ≤ .38 lb/d | all year | 001 |
| Lead, dissolved [as Pb] | daily maximum | ≤ .56 lb/d | all year | 001 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | ≤ 104 CFU/100mL | all year | 001 |
| Flow, in conduit or thru treatment plant | daily 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 | daily maximum | ≤ 0 mg/L | all year | 001 |
| Mercury, dissolved [as Hg] | daily average | ≤ .005 mg/L | all year | 001 |
| Mercury, dissolved [as Hg] | daily maximum | ≤ .0075 mg/L | all year | 001 |
| Mercury, dissolved [as Hg] | daily average | ≤ .0125 lb/d | all year | 001 |
| Mercury, dissolved [as Hg] | daily maximum | ≤ .0188 lb/d | all year | 001 |
| pH range excursions, > 60 minutes | monthly maximum | ≤ 0 occur/mo | all year | 001 |
| pH range excursions, monthly total accum | maximum | ≤ 446 min | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | 002 |
| Copper, dissolved [as Cu] | daily maximum | report only (lb/d) | all year | 002 |
| Lead, dissolved [as Pb] | daily maximum | report only (mg/L) | all year | 002 |
| Lead, dissolved [as Pb] | daily maximum | report only (lb/d) | all year | 002 |
| Nickel, dissolved [as Ni] | daily maximum | report only (mg/L) | all year | 002 |
| Nickel, dissolved [as Ni] | daily maximum | report only (lb/d) | all year | 002 |
| Zinc, dissolved [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, dissolved [as Zn] | daily maximum | report only (lb/d) | all year | 002 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | report only (CFU/100mL) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Mercury, dissolved [as Hg] | daily maximum | report only (mg/L) | all year | 002 |
| Mercury, dissolved [as Hg] | daily maximum | report only (lb/d) | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 003 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | 003 |
| Copper, dissolved [as Cu] | daily maximum | report only (lb/d) | all year | 003 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | report only (CFU/100mL) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Mercury, dissolved [as Hg] | daily maximum | report only (mg/L) | all year | 003 |
| Mercury, dissolved [as Hg] | daily maximum | report only (lb/d) | all year | 003 |
| pH | daily minimum | ≥ 6 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Mercury, dissolved [as Hg] | daily maximum | report only (mg/L) | all year | 004 |
| Mercury, dissolved [as Hg] | daily maximum | report only (lb/d) | all year | 004 |
| pH | daily minimum | ≥ 6 SU | all year | 005 |
| pH | daily maximum | ≤ 9 SU | all year | 005 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 005 |
| Copper, dissolved [as Cu] | daily maximum | report only (mg/L) | all year | 005 |
| Copper, dissolved [as Cu] | daily maximum | report only (lb/d) | all year | 005 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 005 |
| Iron, total [as Fe] | daily maximum | report only (lb/d) | all year | 005 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | all year | 005 |
| Aluminum, total [as Al] | daily maximum | report only (lb/d) | all year | 005 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | report only (CFU/100mL) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Mercury, dissolved [as Hg] | daily maximum | report only (mg/L) | all year | 005 |
| Mercury, dissolved [as Hg] | daily maximum | report only (lb/d) | all year | 005 |
| pH | daily minimum | ≥ 6 SU | all year | 006 |
| pH | daily maximum | ≤ 9 SU | all year | 006 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Nitrogen, total [as N] | daily maximum | report only (lb/d) | all year | 006 |
| Enterococci: group D, MF trans, M-E, EIA | daily maximum | report only (CFU/100mL) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Mercury, dissolved [as Hg] | daily maximum | report only (mg/L) | all year | 006 |
| Mercury, dissolved [as Hg] | daily maximum | report only (lb/d) | all year | 006 |
Cited limits by parameter: Delaware's rules and the federal ones.
Same industry: the 5 Chemicals and Allied Products permits in Delaware.
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Your permit document is the final word. As JSON: /api/v1/permits/DE0050911 · MCP: https://passage-data.com/mcp