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Prasa Naranjito

Sewage treatment plant, Naranjito, Puerto Rico. NPDES permit PR0020737, in force until Aug 31, 2028. Last 12 months: over a limit 17 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (33 values), form Q quarterly, form Y yearly
Renewal application due
Mar 4, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
15 values over a limit, 2 required values missing, 0 of 17 reports late

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

All 17 values over a limit
Period endingParameterReportedLimitOver by
October 2025Ammonia & ammonium- total, daily maximum1.03 mg/L≤ .21 mg/L390%
November 2025Solids, total dissolved, daily maximum550 mg/L≤ 500 mg/L10%
January 2026BOD, 5-day, percent removal, monthly average minimum84 %≥ 85 %7%
January 2026Solids, total dissolved, daily maximum520 mg/L≤ 500 mg/L4%
February 2026Ammonia & ammonium- total, daily maximum.57 mg/L≤ .21 mg/L171%
February 2026Solids, suspended percent removal, monthly average minimum-30 %≥ 85 %767%
February 2026Solids, total suspended, monthly average130 mg/L≤ 30 mg/L333%
February 2026Solids, total suspended, weekly average130 mg/L≤ 45 mg/L189%
April 2026Ammonia & ammonium- total, daily maximum1.41 mg/L≤ .21 mg/L571%
May 2026Sulfide-hydrogen sulfide [undissociated], daily maximum3.1 ug/L≤ 2 ug/L55%
June 2026Temperature, water deg. centigrade, daily maximum30.8 deg C≤ 30 deg C3%
July 2026Ammonia & ammonium- total, daily maximum.38 mg/L≤ .21 mg/L81%
July 2026Enterococci, 90th percentile1211 #/100mL≤ 130 #/100mL832%
July 2026Temperature, water deg. centigrade, daily maximum31.9 deg C≤ 30 deg C6%
August 2026Enterococci, 90th percentile1215 #/100mL≤ 130 #/100mL835%
August 2026Solids, total dissolved, daily maximum550 mg/L≤ 500 mg/L10%
August 2026Temperature, water deg. centigrade, daily maximum30.5 deg C≤ 30 deg C2%

Limits in force (45)

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≤ 32 col unit (pc)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 3 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≤ 90.8 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 136.2 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≤ 90.8 kg/dall year
Solids, total suspendedweekly average≤ 136.2 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 maximumreport only (ug/L)all year
Phosphorus, total [as P]daily maximum≤ 160 ug/Lall year
Phosphorus, total [as P]daily maximum≤ 5.6 mg/Lall year
Cyanide, total [as CN]daily maximum≤ 4 ug/Lall year
Cyanide, total [as CN]daily maximumreport only (ug/L)all year
Copper, total [as Cu]daily maximum≤ 11.67 ug/Lall year
Copper, total [as Cu]daily maximum≤ 160 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 plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximum≤ .8 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
Solids, total dissolveddaily maximum≤ 500 mg/Lall 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≤ .21 mg/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/PR0020737 · MCP: https://passage-data.com/mcp