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Prasa Patillas

Sewage treatment plant, major discharger, Patillas, Puerto Rico. NPDES permit PR0020753, in force until May 31, 2029. Last 12 months: over a limit 18 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (30 values), form Q quarterly, form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
35 values over a limit, 0 required values missing, 0 of 19 reports late

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

All 18 values over a limit
Period endingParameterReportedLimitOver by
October 2025Temperature, water deg. centigrade, daily maximum31.9 deg C≤ 30 deg C6%
November 2025Temperature, water deg. centigrade, daily maximum30.9 deg C≤ 30 deg C3%
January 2026Enterococci, geometric mean560 #/100mL≤ 389 #/100mL44%
February 2026Enterococci, geometric mean940 #/100mL≤ 389 #/100mL142%
March 2026BOD, 5-day, percent removal, monthly average minimum84 %≥ 85 %7%
March 2026Enterococci, geometric mean1585 #/100mL≤ 389 #/100mL307%
April 2026Enterococci, geometric mean428 #/100mL≤ 389 #/100mL10%
April 2026Solids, suspended percent removal, monthly average minimum50 %≥ 85 %233%
April 2026Solids, total suspended, monthly average47 mg/L≤ 30 mg/L57%
April 2026Solids, total suspended, weekly average130 mg/L≤ 45 mg/L189%
May 2026Enterococci, geometric mean425 #/100mL≤ 389 #/100mL9%
May 2026Solids, suspended percent removal, monthly average minimum68 %≥ 85 %113%
May 2026Temperature, water deg. centigrade, daily maximum31 deg C≤ 30 deg C3%
June 2026Temperature, water deg. centigrade, daily maximum32.3 deg C≤ 30 deg C8%
July 2026Enterococci, geometric mean419 #/100mL≤ 389 #/100mL8%
July 2026Temperature, water deg. centigrade, daily maximum32.5 deg C≤ 30 deg C8%
August 2026Enterococci, geometric mean539 #/100mL≤ 389 #/100mL39%
August 2026Temperature, water deg. centigrade, daily maximum33.1 deg C≤ 30 deg C10%

Limits in force (59)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximum≤ 30 deg Call year
Turbiditydaily maximum≤ 50 NTUall year
Turbiditydaily maximum≤ 149 NTUall year
Color [PT-CO units]daily maximum≤ 15 col unit (pc)all year
Color [PT-CO units]daily maximum≤ 63 col unit (pc)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]instantaneous minimum≥ 4.9 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 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≤ 79.62 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 125 kg/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 125 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 187 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 187 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≤ 125 kg/dall year
Solids, total suspendedweekly average≤ 187 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
Nitrogen, total [as N]daily maximum≤ 28026 ug/Lall year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Phosphorus, total [as P]daily maximum≤ 11.2 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .79 ug/Lall year
Copper, total [as Cu]daily maximum≤ 9.3 ug/Lall year
Copper, total [as Cu]daily maximum≤ 260.6 ug/Lall year
Silver, total [as Ag]daily maximum≤ 3.8 ug/Lall year
Silver, total [as Ag]daily maximumreport only (ug/L)all year
Surfactants [MBAS]daily maximum≤ 100 ug/Lall year
Surfactants [MBAS]daily maximum≤ 5228 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≤ 1.1 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 maximum≤ 8 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
Enterococcigeometric mean≤ 389 #/100mLall year
Enterococci90th percentile≤ 130 #/100mLall year
Enterococci90th percentile≤ 2660 #/100mLall year
Mercury, total [as Hg]daily maximum≤ .05 ug/Lall year
Mercury, total [as Hg]daily maximum≤ .2 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≤ .081 mg/Lall year
Ammonia & ammonium- totaldaily maximum≤ 29357 ug/Lall 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/PR0020753 · MCP: https://passage-data.com/mcp