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Sewage treatment plant, major discharger, Ponce, Puerto Rico. NPDES permit PR0021563 expired Jul 31, 2024; its limits still apply. Last 12 months: over a limit 12 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, 5-day, percent removal, monthly average minimum | 16 % | ≥ 30 % | 20% |
| October 2025 | Solids, suspended percent removal, monthly average minimum | 32 % | ≥ 60 % | 70% |
| December 2025 | BOD, 5-day, 20 deg. C, monthly average | 16133 kg/d | ≤ 13692 kg/d | 18% |
| December 2025 | BOD, 5-day, percent removal, monthly average minimum | 27 % | ≥ 30 % | 4% |
| December 2025 | Solids, suspended percent removal, monthly average minimum | 58 % | ≥ 60 % | 5% |
| January 2026 | BOD, 5-day, percent removal, monthly average minimum | 19 % | ≥ 30 % | 16% |
| January 2026 | Nickel, total [as Ni], daily maximum | 15 ug/L | ≤ 8.28 ug/L | 81% |
| March 2026 | BOD, 5-day, percent removal, monthly average minimum | 24 % | ≥ 30 % | 9% |
| April 2026 | Nickel, total [as Ni], daily maximum | 10.2 ug/L | ≤ 8.28 ug/L | 23% |
| May 2026 | Solids, suspended percent removal, monthly average minimum | 42 % | ≥ 60 % | 45% |
| June 2026 | Solids, suspended percent removal, monthly average minimum | 50 % | ≥ 60 % | 25% |
| July 2026 | Solids, suspended percent removal, monthly average minimum | 58 % | ≥ 60 % | 5% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | ≤ 32.2 deg C | all year |
| Turbidity | daily maximum | ≤ 91 NTU | all year |
| Color [PT-CO units] | daily maximum | report only (col unit (pc)) | all year |
| Oxygen, dissolved [DO] | instantaneous minimum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 134 mg/L | all year |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 13692 kg/d | all year |
| BOD, 5-day, 20 deg. C | weekly average | report only (kg/d) | all year |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | weekly average | report only (mg/L) | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 88 mg/L | all year |
| Solids, total suspended | weekly average | report only (mg/L) | all year |
| Solids, total suspended | monthly average | ≤ 8992 kg/d | all year |
| Solids, total suspended | weekly average | report only (kg/d) | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | weekly average | report only (mg/L) | all year |
| Solids, settleable | daily maximum | report only (mL/L) | all year |
| Oil & Grease | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | ≤ 43832 ug/L | all year |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (ug/L) | all year |
| Copper, total [as Cu] | daily maximum | ≤ 84.93 ug/L | all year |
| Nickel, total [as Ni] | daily maximum | ≤ 8.28 ug/L | all year |
| Zinc, total [as Zn] | daily maximum | ≤ 123.82 ug/L | all year |
| Surfactants [MBAS] | daily maximum | ≤ 8235 ug/L | all year |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | weekly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 27 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | daily maximum | ≤ 500 ug/L | all year |
| Cyanide, free available | daily maximum | ≤ 5.3 ug/L | all year |
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | minimum | report only (%) | all year |
| Enterococci | geometric mean | report only (#/100mL) | all year |
| Enterococci | 90th percentile | report only (#/100mL) | all year |
| Mercury, total [as Hg] | daily maximum | ≤ .477 ug/L | all year |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 30 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 60 % | all year |
| % Effect Static Chronic Arbacia punctulata | minimum | report only (%) | all year |
| NOAEL Static 48Hr Acute Cyprinodon variegatus | minimum | report only (%) | all year |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Cyprinodeon variegatus | minimum | report only (%) | all year |
| % Growth Reduction Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | minimum | report only (%) | all year |
Cited limits by parameter: we hold no rule of Puerto Rico's own; 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/PR0021563 · MCP: https://passage-data.com/mcp