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Prasa Guaynabo WTP

Water Supply, major discharger, Guaynabo, Puerto Rico. NPDES permit PR0022438 expired Aug 31, 2026; its limits still apply. Last 12 months: over a limit 4 times (last June 2026), 2 of 13 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (13 values), form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 3 of 14 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, daily maximum7.1 mg/L≤ 5 mg/L42%
February 2026BOD, 5-day, 20 deg. C, daily maximum32.5 mg/L≤ 5 mg/L550%
June 2026Copper, total [as Cu], daily maximum110.73 ug/L≤ 65.29 ug/L70%
June 2026Phosphorus, total [as P], daily maximum8.25 mg/L≤ 4.2 mg/L96%

Limits in force (20)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 30 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Turbiditydaily maximum≤ 500 NTUall year
Color [PT-CO units]daily maximum≤ 15 col unit (pc)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]instantaneous minimum≥ 4 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 5 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, settleabledaily maximumreport only (mL/L)all year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Phosphorus, total [as P]daily maximum≤ 4.2 mg/Lall year
Copper, total [as Cu]daily maximum≤ 10.84 ug/Lall year
Copper, total [as Cu]daily maximum≤ 65.29 ug/Lall year
Flow, in conduit or thru treatment plantdaily maximum≤ 2.37 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 11 ug/Lall year
Whole Effluent Toxicity [WET] - P. promelasminimumreport only (%)all year
Whole Effluent Toxicity [WET] - D. magnaminimumreport only (%)all year
Ammonia & ammonium- totaldaily maximumreport only (ug/L)all year

How strict are these limits?

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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PR0022438 · MCP: https://passage-data.com/mcp