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Prasa Vega Baja STP

Sewage treatment plant, major discharger, Vega Baja, Puerto Rico. NPDES permit PR0021679, in force until Apr 30, 2031. Last 12 months: over a limit 21 times (last August 2026), 4 required values missing. 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
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 0 of 17 reports late

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

All 21 values over a limit
Period endingParameterReportedLimitOver by
February 2026Solids, total dissolved, daily maximum550 mg/L≤ 500 mg/L10%
March 2026Solids, total dissolved, daily maximum510 mg/L≤ 500 mg/L2%
April 2026Solids, total dissolved, daily maximum570 mg/L≤ 500 mg/L14%
May 2026Ammonia & ammonium- total, daily maximum3.49 mg/L≤ .3548 mg/L884%
May 2026Enterococci, 90th percentile1700 #/100mL≤ 130 #/100mL1208%
May 2026Enterococci, geometric mean94 #/100mL≤ 35 #/100mL169%
May 2026Nitrogen, total [as N], daily maximum6420 ug/L≤ 1700 ug/L278%
June 2026Ammonia & ammonium- total, daily maximum.48 mg/L≤ .3548 mg/L35%
June 2026Enterococci, 90th percentile1700 #/100mL≤ 130 #/100mL1208%
June 2026Enterococci, geometric mean1540 #/100mL≤ 35 #/100mL4300%
June 2026Nitrogen, total [as N], daily maximum10490 ug/L≤ 1700 ug/L517%
July 2026Ammonia & ammonium- total, daily maximum.7 mg/L≤ .3548 mg/L97%
July 2026Enterococci, 90th percentile1428 #/100mL≤ 130 #/100mL998%
July 2026Enterococci, geometric mean229 #/100mL≤ 35 #/100mL554%
July 2026Nitrogen, total [as N], daily maximum9150 ug/L≤ 1700 ug/L438%
July 2026Phosphorus, total [as P], daily maximum230 ug/L≤ 160 ug/L44%
August 2026Ammonia & ammonium- total, daily maximum13.77 mg/L≤ .3548 mg/L3781%
August 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
August 2026Enterococci, geometric mean675 #/100mL≤ 35 #/100mL1829%
August 2026Nitrogen, total [as N], daily maximum16600 ug/L≤ 1700 ug/L876%
August 2026Phosphorus, total [as P], daily maximum610 ug/L≤ 160 ug/L281%

Limits in force (49)

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
BOD, 5-day, 20 deg. Cmonthly average≤ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 12 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 79 kg/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 477 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 716 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 716 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≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 477 kg/dall year
Solids, total suspendedweekly average≤ 716 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≤ 1700 ug/Lall year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Cyanide, total [as CN]daily maximumreport only (ug/L)all year
Chromium, hexavalent [as Cr]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily maximum≤ 13 ug/Lall year
Copper, total [as Cu]daily maximum≤ 29.94 ug/Lall year
Surfactants [MBAS]daily maximum≤ 100 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≤ 4.2 MGDall year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 11 ug/Lall year
Sulfide-hydrogen sulfide [undissociated]daily maximum≤ 2 ug/Lall year
Whole Effluent Toxicity [WET] - P. promelasminimumreport only (%)all year
Whole Effluent Toxicity [WET] - D. magnaminimumreport only (%)all year
Enterococcigeometric mean≤ 35 #/100mLall year
Enterococci90th percentile≤ 130 #/100mLall year
Mercury, total [as Hg]daily maximum≤ .05 ug/Lall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Ammonia & ammonium- totaldaily maximum≤ .3548 mg/Lall year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/PR0021679 · MCP: https://passage-data.com/mcp