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PRASA Culebra WWTP

Sewage treatment plant, Culebra, Puerto Rico. NPDES permit PR0026549, in force until Jun 30, 2028. Last 12 months: over a limit 34 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (34 values), form Q quarterly (1 value), form Y yearly
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
38 values over a limit, 0 required values missing, 0 of 17 reports late

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

All 34 values over a limit
Period endingParameterReportedLimitOver by
October 2025Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
October 2025Enterococci, geometric mean1645 #/100mL≤ 35 #/100mL4600%
October 2025Temperature, water deg. centigrade, daily maximum31.6 deg C≤ 30 deg C5%
November 2025BOD, 5-day, percent removal, monthly average minimum83 %≥ 85 %13%
November 2025Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
November 2025Enterococci, geometric mean1700 #/100mL≤ 35 #/100mL4757%
November 2025Temperature, water deg. centigrade, daily maximum30.2 deg C≤ 30 deg C1%
December 2025Cyanide, total [as CN], daily maximum6 ug/L≤ 4 ug/L50%
December 2025Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
December 2025Enterococci, geometric mean2420 #/100mL≤ 35 #/100mL6814%
January 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
January 2026Enterococci, geometric mean1069 #/100mL≤ 35 #/100mL2954%
February 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
February 2026Enterococci, geometric mean502 #/100mL≤ 35 #/100mL1334%
February 2026Temperature, water deg. centigrade, daily maximum30.1 deg C≤ 30 deg C0%
March 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
March 2026Enterococci, geometric mean316 #/100mL≤ 35 #/100mL803%
March 2026Temperature, water deg. centigrade, daily maximum30.1 deg C≤ 30 deg C0%
April 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
April 2026Enterococci, geometric mean715 #/100mL≤ 35 #/100mL1943%
April 2026Temperature, water deg. centigrade, daily maximum30.4 deg C≤ 30 deg C1%
May 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
May 2026Enterococci, geometric mean526 #/100mL≤ 35 #/100mL1403%
May 2026Temperature, water deg. centigrade, daily maximum30.8 deg C≤ 30 deg C3%
June 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
June 2026Enterococci, geometric mean836 #/100mL≤ 35 #/100mL2289%
June 2026Temperature, water deg. centigrade, daily maximum32.7 deg C≤ 30 deg C9%
July 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
July 2026Enterococci, geometric mean365 #/100mL≤ 35 #/100mL943%
July 2026Surfactants [MBAS], daily maximum109 ug/L≤ 100 ug/L9%
July 2026Temperature, water deg. centigrade, daily maximum32.2 deg C≤ 30 deg C7%
August 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
August 2026Enterococci, geometric mean795 #/100mL≤ 35 #/100mL2171%
August 2026Temperature, water deg. centigrade, daily maximum32.8 deg C≤ 30 deg C9%

Limits in force (51)

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≤ 40 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≤ 30 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≤ 3 kg/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 8.656 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 34 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 34 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≤ 22 kg/dall year
Solids, total suspendedweekly average≤ 34 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
Nitrogen, total [as N]daily maximum≤ 1700 ug/Lall year
Nitrogen, total [as N]daily maximumreport only (ug/L)all year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Phosphorus, total [as P]daily maximumreport only (ug/L)all year
Cyanide, total [as CN]daily maximum≤ 4 ug/Lall year
Copper, total [as Cu]daily maximum≤ 9.32 ug/Lall year
Copper, total [as Cu]daily maximum≤ 37.55 ug/Lall year
Lead, total [as Pb]daily maximum≤ 3.2 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 119.82 ug/Lall year
Surfactants [MBAS]daily maximum≤ 100 ug/Lall year
Pentachlorophenolquarterly maximum≤ 1 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≤ .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
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Ammonia & ammonium- totaldaily maximum≤ .08 mg/Lall year
Ammonia & ammonium- totaldaily maximumreport only (mg/L)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/PR0026549 · MCP: https://passage-data.com/mcp