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Prasa Lares WWTP

Sewage treatment plant, major discharger, Lares, Puerto Rico. NPDES permit PR0025879, in force until Sep 30, 2030. Last 12 months: over a limit 28 times (last August 2026), 23 required values missing, 2 of 17 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form A monthly (32 values), form Q quarterly (3 values), form Y yearly (1 value), form S twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 18 reports late

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

All 28 values over a limit
Period endingParameterReportedLimitOver by
October 2025Enterococci, 90th percentile2189 #/100mL≤ 130 #/100mL1584%
October 2025Enterococci, geometric mean515 #/100mL≤ 35 #/100mL1371%
October 2025Nitrogen, total [as N], daily maximum10420 ug/L≤ 1700 ug/L513%
November 2025Enterococci, 90th percentile1871 #/100mL≤ 130 #/100mL1339%
November 2025Enterococci, geometric mean450 #/100mL≤ 35 #/100mL1186%
November 2025Nitrogen, total [as N], daily maximum28280 ug/L≤ 1700 ug/L1564%
December 2025Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
December 2025Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
December 2025Enterococci, geometric mean435 #/100mL≤ 35 #/100mL1143%
December 2025Enterococci, geometric mean435 #/100mL≤ 35 #/100mL1143%
December 2025Nitrogen, total [as N], daily maximum24160 ug/L≤ 1700 ug/L1321%
December 2025Nitrogen, total [as N], daily maximum24160 ug/L≤ 1700 ug/L1321%
January 2026Enterococci, 90th percentile1733 #/100mL≤ 130 #/100mL1233%
January 2026Enterococci, geometric mean201 #/100mL≤ 35 #/100mL474%
January 2026Nitrogen, total [as N], daily maximum23440 ug/L≤ 1700 ug/L1279%
February 2026Enterococci, 90th percentile1293 #/100mL≤ 130 #/100mL895%
February 2026Enterococci, 90th percentile1293 #/100mL≤ 130 #/100mL895%
February 2026Enterococci, geometric mean97 #/100mL≤ 35 #/100mL177%
February 2026Enterococci, geometric mean97 #/100mL≤ 35 #/100mL177%
February 2026Nitrogen, total [as N], daily maximum31080 ug/L≤ 1700 ug/L1728%
February 2026Nitrogen, total [as N], daily maximum31080 ug/L≤ 1700 ug/L1728%
March 2026Enterococci, geometric mean47 #/100mL≤ 35 #/100mL34%
March 2026Nitrogen, total [as N], daily maximum29330 ug/L≤ 1700 ug/L1625%
April 2026Nitrogen, total [as N], daily maximum24320 ug/L≤ 1700 ug/L1331%
May 2026Nitrogen, total [as N], daily maximum29160 ug/L≤ 1700 ug/L1615%
June 2026Nitrogen, total [as N], daily maximum22940 ug/L≤ 1700 ug/L1249%
July 2026Nitrogen, total [as N], daily maximum25470 ug/L≤ 1700 ug/L1398%
August 2026Nitrogen, total [as N], daily maximum12330 ug/L≤ 1700 ug/L625%

Limits in force (49)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 30 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Color [PT-CO units]daily maximum≤ 15 col unit (pc)all year
Color [PT-CO units]daily maximum≤ 64 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. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 136.9 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 205.4 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 average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 136.9 kg/dall year
Solids, total suspendedweekly average≤ 205.4 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
Phosphorus, total [as P]daily maximum≤ 6.36 mg/Lall year
Cyanide, total [as CN]daily maximum≤ 4 ug/Lall year
Lead, total [as Pb]daily maximum≤ 2.01 ug/Lall year
Lead, total [as Pb]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 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≤ 1.206 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
Sulfide-hydrogen sulfide [undissociated]daily maximumreport only (ug/L)all 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≤ .58 mg/Lall year
Ammonia & ammonium- totaldaily maximum≤ 48.7 mg/Lall year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year
% Coefficient Of Variation 21 Day Chronic Daphnia Magnaminimumreport 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/PR0025879 · MCP: https://passage-data.com/mcp