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Prasa Guaraguao WTP

Water Supply, Ponce, Puerto Rico. NPDES permit PR0024651 expired Jan 31, 2024; its limits still apply. Last 12 months: over a limit 4 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (12 values), form Q quarterly, form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 1 of 17 reports late

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

Period endingParameterReportedLimitOver by
November 2025Turbidity, daily maximum55 NTU≤ 50 NTU—
February 2026Phosphorus, total [as P], daily maximum5280 ug/L≤ 5000 ug/L6%
February 2026Turbidity, daily maximum190 NTU≤ 50 NTU—
March 2026Chlorine, total residual, daily maximum150 ug/L≤ 11 ug/L1264%

Limits in force (24)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 32.2 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Color [PT-CO units]daily maximum≤ 15 col unit (pc)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 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≤ 5000 ug/Lall year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Cadmium, total [as Cd]daily maximum≤ .31 ug/Lall year
Cadmium, total [as Cd]daily maximum≤ 1.4 ug/Lall year
Copper, total [as Cu]daily maximum≤ 10.8 ug/Lall year
Copper, total [as Cu]daily maximum≤ 76.91 ug/Lall year
Lead, total [as Pb]daily maximum≤ 3.97 ug/Lall year
Lead, total [as Pb]daily maximum≤ 10 ug/Lall year
Surfactants [MBAS]daily maximum≤ 100 ug/Lall year
Flow, in conduit or thru treatment plantdaily maximum≤ .006 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 11 ug/Lall year
Cyanide, free availabledaily maximum≤ 5.2 ug/Lall year
Solids, total dissolveddaily maximum≤ 500 mg/Lall year
Mercury, total [as Hg]daily maximum≤ .05 ug/Lall 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/PR0024651 · MCP: https://passage-data.com/mcp