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Sewerage Systems, Rio Grande, Puerto Rico. NPDES permit PR0026310 expired Jul 31, 2024; its limits still apply. Last 12 months: over a limit 57 times (last March 2026), 178 required values missing, 5 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, 5-day, 20 deg. C, monthly average | 11 mg/L | ≤ 5 mg/L | 120% |
| October 2025 | BOD, 5-day, percent removal, monthly average minimum | 75 % | ≥ 85 % | 67% |
| October 2025 | Chlorine, total residual, daily maximum | 1400 ug/L | ≤ 11 ug/L | 12627% |
| October 2025 | Nitrogen, total [as N], daily maximum | 8310 ug/L | ≤ 1700 ug/L | 389% |
| October 2025 | Oxygen, dissolved [DO], instantaneous minimum | 4.55 mg/L | ≥ 5 mg/L | 9% |
| October 2025 | Temperature, water deg. centigrade, daily maximum | 32.7 deg C | ≤ 32.2 deg C | 2% |
| November 2025 | Chlorine, total residual, daily maximum | 1750 ug/L | ≤ 11 ug/L | 15809% |
| November 2025 | Nitrogen, total [as N], daily maximum | 9420 ug/L | ≤ 1700 ug/L | 454% |
| November 2025 | Surfactants [MBAS], daily maximum | 15600 ug/L | ≤ 100 ug/L | 15500% |
| December 2025 | Chlorine, total residual, daily maximum | 1550 ug/L | ≤ 11 ug/L | 13991% |
| December 2025 | Chlorine, total residual, daily maximum | 1550 ug/L | ≤ 11 ug/L | 13991% |
| December 2025 | Enterococci, 90th percentile | 330 #/100mL | ≤ 130 #/100mL | 154% |
| December 2025 | Enterococci, 90th percentile | 330 #/100mL | ≤ 130 #/100mL | 154% |
| December 2025 | Enterococci, monthly average | 241 #/100mL | ≤ 35 #/100mL | 589% |
| December 2025 | Enterococci, monthly average | 241 #/100mL | ≤ 35 #/100mL | 589% |
| December 2025 | Nitrite + Nitrate total [as N], daily maximum | 13400 ug/L | ≤ 10000 ug/L | 34% |
| December 2025 | Nitrite + Nitrate total [as N], daily maximum | 13400 ug/L | ≤ 10000 ug/L | 34% |
| December 2025 | Nitrogen, total [as N], daily maximum | 13400 ug/L | ≤ 1700 ug/L | 688% |
| December 2025 | Nitrogen, total [as N], daily maximum | 13400 ug/L | ≤ 1700 ug/L | 688% |
| December 2025 | Oxygen, dissolved [DO], instantaneous minimum | 4.85 mg/L | ≥ 5 mg/L | 3% |
| December 2025 | Oxygen, dissolved [DO], instantaneous minimum | 4.85 mg/L | ≥ 5 mg/L | 3% |
| January 2026 | BOD, 5-day, 20 deg. C, monthly average | 16 mg/L | ≤ 5 mg/L | 220% |
| January 2026 | BOD, 5-day, 20 deg. C, monthly average | 16 mg/L | ≤ 5 mg/L | 220% |
| January 2026 | BOD, 5-day, percent removal, monthly average minimum | 78 % | ≥ 85 % | 47% |
| January 2026 | BOD, 5-day, percent removal, monthly average minimum | 78 % | ≥ 85 % | 47% |
| January 2026 | Chlorine, total residual, daily maximum | 1870 ug/L | ≤ 11 ug/L | 16900% |
| January 2026 | Chlorine, total residual, daily maximum | 1870 ug/L | ≤ 11 ug/L | 16900% |
| January 2026 | Color [PT-CO units], daily maximum | 30 col unit (pc) | ≤ 15 col unit (pc) | — |
| January 2026 | Enterococci, monthly average | 223 #/100mL | ≤ 35 #/100mL | 537% |
| January 2026 | Enterococci, monthly average | 223 #/100mL | ≤ 35 #/100mL | 537% |
| January 2026 | Nitrogen, total [as N], daily maximum | 36000 ug/L | ≤ 1700 ug/L | 2018% |
| January 2026 | Nitrogen, total [as N], daily maximum | 36000 ug/L | ≤ 1700 ug/L | 2018% |
| January 2026 | Oxygen, dissolved [DO], instantaneous minimum | 4 mg/L | ≥ 5 mg/L | 20% |
| January 2026 | Oxygen, dissolved [DO], instantaneous minimum | 4 mg/L | ≥ 5 mg/L | 20% |
| January 2026 | Solids, suspended percent removal, monthly average minimum | 64 % | ≥ 85 % | 140% |
| January 2026 | Solids, suspended percent removal, monthly average minimum | 64 % | ≥ 85 % | 140% |
| February 2026 | Chlorine, total residual, daily maximum | 1470 ug/L | ≤ 11 ug/L | 13264% |
| February 2026 | Chlorine, total residual, daily maximum | 1470 ug/L | ≤ 11 ug/L | 13264% |
| February 2026 | Enterococci, monthly average | 64 #/100mL | ≤ 35 #/100mL | 83% |
| February 2026 | Enterococci, monthly average | 64 #/100mL | ≤ 35 #/100mL | 83% |
| February 2026 | Nitrogen, total [as N], daily maximum | 5420 ug/L | ≤ 1700 ug/L | 219% |
| February 2026 | Nitrogen, total [as N], daily maximum | 5420 ug/L | ≤ 1700 ug/L | 219% |
| February 2026 | Oxygen, dissolved [DO], instantaneous minimum | 4.16 mg/L | ≥ 5 mg/L | 17% |
| February 2026 | Oxygen, dissolved [DO], instantaneous minimum | 4.16 mg/L | ≥ 5 mg/L | 17% |
| February 2026 | Solids, suspended percent removal, monthly average minimum | 80 % | ≥ 85 % | 33% |
| February 2026 | Solids, suspended percent removal, monthly average minimum | 80 % | ≥ 85 % | 33% |
| March 2026 | BOD, 5-day, 20 deg. C, monthly average | 8 mg/L | ≤ 5 mg/L | 60% |
| March 2026 | BOD, 5-day, 20 deg. C, monthly average | 8 mg/L | ≤ 5 mg/L | 60% |
| March 2026 | Chlorine, total residual, daily maximum | 2090 ug/L | ≤ 11 ug/L | 18900% |
| March 2026 | Chlorine, total residual, daily maximum | 2090 ug/L | ≤ 11 ug/L | 18900% |
| March 2026 | Color [PT-CO units], daily maximum | 20 col unit (pc) | ≤ 15 col unit (pc) | — |
| March 2026 | Nitrogen, total [as N], daily maximum | 4400 ug/L | ≤ 1700 ug/L | 159% |
| March 2026 | Nitrogen, total [as N], daily maximum | 4400 ug/L | ≤ 1700 ug/L | 159% |
| March 2026 | Oxygen, dissolved [DO], instantaneous minimum | 4.5 mg/L | ≥ 5 mg/L | 10% |
| March 2026 | Oxygen, dissolved [DO], instantaneous minimum | 4.5 mg/L | ≥ 5 mg/L | 10% |
| March 2026 | Solids, suspended percent removal, monthly average minimum | 81 % | ≥ 85 % | 27% |
| March 2026 | Solids, suspended percent removal, monthly average minimum | 81 % | ≥ 85 % | 27% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | ≤ 32.2 deg C | all year |
| Turbidity | daily maximum | ≤ 50 NTU | all year |
| Color [PT-CO units] | daily maximum | ≤ 15 col unit (pc) | all year |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 5 mg/L | all year |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year |
| Oil & Grease | daily maximum | report only (mg/L) | all year |
| Nitrogen, total [as N] | daily maximum | ≤ 1700 ug/L | all year |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 10000 ug/L | all year |
| Phosphorus, total [as P] | daily maximum | report only (ug/L) | all year |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year |
| Surfactants [MBAS] | daily maximum | ≤ 100 ug/L | all year |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .315 MGD | all year |
| Chlorine, total residual | daily maximum | ≤ 11 ug/L | all year |
| Enterococci | monthly average | ≤ 35 #/100mL | all year |
| Enterococci | 90th percentile | ≤ 130 #/100mL | all year |
| Solids, total dissolved | daily maximum | ≤ 500 mg/L | all year |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year |
| Ammonia & ammonium- total | daily maximum | report only (mg/L) | 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/PR0026310 · MCP: https://passage-data.com/mcp