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Clean Water Act discharge permit · NPDES PR0023761

PRASA SANTA ISABEL WWTP, Santa Isabel, PR: NPDES PR0023761 discharge permit, effluent exceedances, inspections, penalties

PRASA SANTA ISABEL WWTP, held by PRASA SANTA ISABEL, holds NPDES permit PR0023761, which discharges to Caribbean Sea. EPA’s file records it issued April 16, 2014 and expiring June 30, 2019. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedPRASA SANTA ISABEL WWTP
Permittee as filedPRASA SANTA ISABEL
NPDES IDPR0023761
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedApril 16, 2014
Expiration dateJune 30, 2019
AddressSanta Isabel, PR 00757
Receiving waterCARIBBEAN SEA

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended7225125October 31, 20251,344% over the limit
Chlorine, total residual19084November 30, 20246,433% over the limit
Copper, total [as Cu]27872May 31, 202410,061% over the limit
pH28571October 31, 2024
Cyanide, total [as CN]06968November 30, 20132,300% over the limit
Turbidity26963May 31, 2024
Oxygen, dissolved [DO]16961October 31, 202483% over the limit
Flow, in conduit or thru treatment plant47858April 30, 200668,500% over the limit
Solids, suspended percent removal110856March 31, 2026407% over the limit
Coliform, fecal general26755September 30, 201999,999% over the limit
Nitrogen, inorganic total05755April 30, 2006534% over the limit
Phenolics, total recoverable09552April 30, 20063,000% over the limit
Nitrogen, total [as N]26950April 30, 201620,977% over the limit
BOD, 5-day, 20 deg. C716746August 31, 20251,200% over the limit
Enterococci23428September 30, 2019784% over the limit
Surfactants [MBAS]23425January 31, 20141,712% over the limit
Coliform, fecal - % samples exceeding limit13222September 30, 2019400% over the limit
Coliform, total general27020January 31, 2014761,720% over the limit
BOD, 5-day, percent removal16918September 30, 2025533% over the limit
Zinc, total [as Zn]02016May 31, 2005110% over the limit
Lead, total [as Pb]01816December 31, 2004288% over the limit
Cyanide, free available22213July 31, 20201,760% over the limit
Sulfide, total [as S]01411June 30, 200223,400% over the limit
Enterococci: group D, MF trans, M-E, EIA01410May 31, 201499,999% over the limit
Silver, total [as Ag]2139November 30, 20141,078% over the limit
Temperature, water deg. centigrade1168August 31, 201888% over the limit
Sulfide-hydrogen sulfide [undissociated]2246November 30, 20237,900% over the limit
Selenium, total [as Se]086June 30, 2005420% over the limit
Enterococci - % of upper confidence limit1514September 30, 201933% over the limit
Nickel, total [as Ni]2103November 30, 201376% over the limit
Cadmium, total [as Cd]062July 31, 200475,900% over the limit
Manganese, total [as Mn]051July 31, 20014% over the limit
Mercury, total [as Hg]031December 31, 20071,371% over the limit
Arsenic, total [as As]011May 31, 2006257% over the limit
Whole Effluent Toxicity [WET] - M. beryllina1200
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)1200
Phenols0170
Oil & Grease1130
Whole effluent toxicity090
Color [PT-CO units]180
Solids, settleable180
Pentachlorophenol050
Chromium, total [as Cr]040
2-Chlorophenol040
2,4-Dichlorophenol040
2,4-Dimethylphenol040
2,4-Dinitrophenol040
2,4,6-Trichlorophenol040
Nickel, dissolved [as Ni]030
2-Methyl-4,6-dinitrophenol030
Sulfate, total [as SO4]210

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
April 6, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 20, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 18, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 12, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 4, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 3, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 12, 2025Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6

Velarion’s copy of EPA’s ICIS-NPDES files does not yet include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID PR0023761 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.