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Prasa Maunabo

Sewage treatment plant, major discharger, Maunabo, Puerto Rico. NPDES permit PR0020656, in force until Apr 30, 2031. Last 12 months: over a limit 45 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (33 values), form S twice a year, form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 17 reports late

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

All 45 values over a limit
Period endingParameterReportedLimitOver by
January 2026BOD, 5-day, 20 deg. C, monthly average25 mg/L≤ 20 mg/L25%
January 2026BOD, 5-day, 20 deg. C, weekly average56 mg/L≤ 45 mg/L24%
January 2026BOD, 5-day, percent removal, monthly average minimum55 %≥ 85 %200%
January 2026Solids, suspended percent removal, monthly average minimum74 %≥ 85 %73%
February 2026BOD, 5-day, 20 deg. C, monthly average29 mg/L≤ 20 mg/L45%
February 2026BOD, 5-day, 20 deg. C, weekly average52 mg/L≤ 45 mg/L16%
February 2026BOD, 5-day, percent removal, monthly average minimum52 %≥ 85 %220%
February 2026Solids, suspended percent removal, monthly average minimum74 %≥ 85 %73%
March 2026BOD, 5-day, 20 deg. C, monthly average28 mg/L≤ 20 mg/L40%
March 2026BOD, 5-day, percent removal, monthly average minimum69 %≥ 85 %107%
March 2026Copper, total [as Cu], daily maximum36.18 ug/L≤ 28.88 ug/L25%
March 2026Solids, suspended percent removal, monthly average minimum84 %≥ 85 %7%
April 2026BOD, 5-day, 20 deg. C, monthly average25 mg/L≤ 20 mg/L25%
April 2026BOD, 5-day, 20 deg. C, weekly average65 mg/L≤ 45 mg/L44%
April 2026BOD, 5-day, percent removal, monthly average minimum68 %≥ 85 %113%
April 2026Phosphorus, total [as P], daily maximum3.8 mg/L≤ 3.7 mg/L3%
April 2026Solids, suspended percent removal, monthly average minimum79 %≥ 85 %40%
May 2026Ammonia & ammonium- total, daily maximum14790 ug/L≤ .081 ug/L—
May 2026Enterococci, 90th percentile1441 #/100mL≤ 130 #/100mL1008%
May 2026Enterococci, geometric mean250 #/100mL≤ 35 #/100mL614%
May 2026Nitrogen, total [as N], daily maximum19000 ug/L≤ 1700 ug/L1018%
May 2026Phosphorus, total [as P], daily maximum1700 ug/L≤ 160 ug/L963%
June 2026Ammonia & ammonium- total, daily maximum15100 ug/L≤ .081 ug/L—
June 2026BOD, 5-day, percent removal, monthly average minimum84 %≥ 85 %7%
June 2026Color [PT-CO units], daily maximum20 col unit (pc)≤ 15 col unit (pc)—
June 2026Enterococci, 90th percentile2420 #/100mL≤ 130 #/100mL1762%
June 2026Enterococci, geometric mean434 #/100mL≤ 35 #/100mL1140%
June 2026Nitrogen, total [as N], daily maximum13810 ug/L≤ 1700 ug/L712%
June 2026Phosphorus, total [as P], daily maximum510 ug/L≤ 160 ug/L219%
June 2026Temperature, water deg. centigrade, daily maximum31.9 deg C≤ 30 deg C6%
July 2026Ammonia & ammonium- total, daily maximum15890 ug/L≤ .081 ug/L—
July 2026BOD, 5-day, 20 deg. C, weekly average48 mg/L≤ 45 mg/L7%
July 2026BOD, 5-day, percent removal, monthly average minimum75 %≥ 85 %67%
July 2026Enterococci, 90th percentile1441 #/100mL≤ 130 #/100mL1008%
July 2026Enterococci, geometric mean365 #/100mL≤ 35 #/100mL943%
July 2026Nitrogen, total [as N], daily maximum13480 ug/L≤ 1700 ug/L693%
July 2026Phosphorus, total [as P], daily maximum510 ug/L≤ 160 ug/L219%
July 2026Temperature, water deg. centigrade, daily maximum31.5 deg C≤ 30 deg C5%
August 2026Ammonia & ammonium- total, daily maximum6210 ug/L≤ .081 ug/L—
August 2026BOD, 5-day, percent removal, monthly average minimum77 %≥ 85 %53%
August 2026Enterococci, 90th percentile2077 #/100mL≤ 130 #/100mL1498%
August 2026Enterococci, geometric mean460 #/100mL≤ 35 #/100mL1214%
August 2026Nitrogen, total [as N], daily maximum18400 ug/L≤ 1700 ug/L982%
August 2026Phosphorus, total [as P], daily maximum2970 ug/L≤ 160 ug/L1756%
August 2026Temperature, water deg. centigrade, daily maximum31.7 deg C≤ 30 deg C6%

Limits in force (42)

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
Oxygen, dissolved [DO]daily 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≤ 113 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 170 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≤ 113.5 kg/dall year
Solids, total suspendedweekly average≤ 170 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
Copper, total [as Cu]daily maximum≤ 28.88 ug/Lall year
Copper, total [as Cu]daily maximum≤ 8.7 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 maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximum≤ 1 MGDall 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
Solids, total dissolveddaily maximum≤ 845 mg/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≤ .081 ug/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/PR0020656 · MCP: https://passage-data.com/mcp