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Prasa Vieques WWTP

Sewage treatment plant, Vieques, Puerto Rico. NPDES permit PR0025453, in force until Nov 30, 2027. Last 12 months: over a limit 2 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (31 values), form Q quarterly, form Y yearly
Renewal application due
Jun 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 17 reports late

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

Period endingParameterReportedLimitOver by
November 2025BOD, 5-day, 20 deg. C, weekly average46 mg/L≤ 45 mg/L2%
July 2026Solids, total suspended, monthly average32 mg/L≤ 30 mg/L7%

Limits in force (51)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 30 deg Call year
Turbiditydaily maximum≤ 10 NTUall year
Turbiditydaily maximum≤ 34 NTUall year
Color [PT-CO units]daily maximumreport only (col unit (pc))all year
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 56.77 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 85.15 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
pHminimum≥ 7.3 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 56.77 kg/dall year
Solids, total suspendedweekly average≤ 85.15 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, settleabledaily maximumreport only (mL/L)all year
Oil & Greasedaily maximumreport only (mg/L)all year
Nitrogen, total [as N]daily maximum≤ 5000 ug/Lall year
Nitrogen, total [as N]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily maximum≤ 3.73 ug/Lall year
Copper, total [as Cu]daily maximum≤ 81.4 ug/Lall year
Lead, total [as Pb]daily maximum≤ 8.52 ug/Lall year
Silver, total [as Ag]daily maximum≤ 2.24 ug/Lall year
Silver, total [as Ag]daily maximumreport only (ug/L)all year
Zinc, total [as Zn]daily maximum≤ 85.62 ug/Lall year
Zinc, total [as Zn]daily maximumreport only (ug/L)all year
Surfactants [MBAS]daily maximum≤ 500 ug/Lall year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximum≤ .5 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 7.5 ug/Lall year
Cyanide, free availabledaily maximum≤ 1 ug/Lall year
Cyanide, free availabledaily maximum≤ 7.2 ug/Lall year
Sulfide-hydrogen sulfide [undissociated]daily maximum≤ 2 ug/Lall year
Whole Effluent Toxicity [WET] - M. beryllinaminimumreport only (%)all year
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)minimumreport only (%)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≤ .051 ug/Lall year
Mercury, total [as Hg]daily maximum≤ .6 ug/Lall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: we hold no rule of Puerto Rico's own; the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PR0025453 · MCP: https://passage-data.com/mcp