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Sewerage Systems, Rio Grande, Puerto Rico. NPDES permit PR0026425, in force until Nov 30, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | ≤ 30 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 | daily maximum | ≤ 5 mg/L | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | daily maximum | 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 | ≤ 1700 ug/L | all year |
| Phosphorus, total [as P] | daily maximum | ≤ 160 ug/L | all year |
| Sulfide, total [as S] | daily maximum | ≤ 2 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 3 ug/L | all year |
| Surfactants [MBAS] | daily maximum | ≤ 100 ug/L | all year |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 1 MGD | all year |
| Chlorine, total residual | daily maximum | ≤ 11 ug/L | all year |
| Enterococci | geometric mean | ≤ 35 #/100mL | all year |
| Enterococci | 90th percentile | ≤ 130 #/100mL | all year |
| Mercury, total [as Hg] | daily maximum | ≤ .05 ug/L | all year |
| Ammonia & ammonium- total | daily maximum | report only (ug/L) | all year |
Cited limits by parameter: we hold no rule of Puerto Rico's own; the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/PR0026425 · MCP: https://passage-data.com/mcp