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Prasa WTP El Yunque Filtr PLT

Water Supply, major discharger, Rio Grande, Puerto Rico. NPDES permit PR0023931 expired Apr 30, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (14 values), form Q quarterly, form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 17 reports late

Limits in force (35)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 32.2 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Turbiditydaily maximum≤ 864 NTUall year
Color [PT-CO units]daily maximum≤ 15 col unit (pc)all year
Color [PT-CO units]daily maximumreport only (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 maximumreport only (ug/L)all year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Cadmium, total [as Cd]daily maximum≤ .08 ug/Lall year
Cadmium, total [as Cd]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily maximum≤ 2.3 ug/Lall year
Copper, total [as Cu]daily maximum≤ 198.7 ug/Lall year
Lead, total [as Pb]daily maximum≤ .38 ug/Lall year
Lead, total [as Pb]daily maximumreport only (ug/L)all year
Silver, total [as Ag]daily maximum≤ .2 ug/Lall year
Silver, total [as Ag]daily maximumreport only (ug/L)all year
Zinc, total [as Zn]daily maximum≤ 29.34 ug/Lall year
Zinc, total [as Zn]daily maximumreport only (ug/L)all year
Surfactants [MBAS]daily maximum≤ 100 ug/Lall year
Surfactants [MBAS]daily maximumreport only (ug/L)all year
Flow, in conduit or thru treatment plantdaily maximum≤ 2.2 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
Cyanide, free availabledaily maximumreport only (ug/L)all year
Enterococcigeometric mean≤ 35 #/100mLall year
Enterococcigeometric meanreport only (#/100mL)all year
Enterococci90th percentile≤ 130 #/100mLall year
Enterococci90th percentilereport only (#/100mL)all year
Mercury, total [as Hg]daily maximum≤ .05 ug/Lall year
Ammonia & ammonium- totaldaily maximumreport only (ug/L)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/PR0023931 · MCP: https://passage-data.com/mcp