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Water Supply, Mayaguez, Puerto Rico. NPDES permit PR0022900 expired Apr 30, 2024; its limits still apply. Last 12 months: over a limit once (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit |
|---|---|---|---|
| April 2026 | Turbidity, daily maximum | 55 NTU | ≤ 50 NTU |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | ≤ 32.2 deg C | all year |
| Turbidity | daily maximum | ≤ 50 NTU | all year |
| Turbidity | daily maximum | ≤ 200 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 |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, settleable | daily maximum | report only (mL/L) | all year |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | ≤ 10.5 ug/L | all year |
| Copper, total [as Cu] | daily maximum | ≤ 180 ug/L | all year |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ .407 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | daily maximum | ≤ 11 ug/L | all year |
| Cyanide, free available | daily maximum | ≤ 5.2 ug/L | 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.
Same industry: the 108 Water Supply permits in Puerto Rico.
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Your permit document is the final word. As JSON: /api/v1/permits/PR0022900 · MCP: https://passage-data.com/mcp