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Clean Water Act discharge permit · NPDES PR0020451

PRASA COROZAL WWTP, Corozal, PR: NPDES PR0020451 discharge permit, effluent exceedances, inspections, penalties

PRASA COROZAL WWTP, held by PRASA COROZAL, holds NPDES permit PR0020451, which discharges to Rio Los Negros. EPA’s file records it issued September 29, 2015 and expiring January 31, 2021. 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 COROZAL WWTP
Permittee as filedPRASA COROZAL
NPDES IDPR0020451
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
IssuedSeptember 29, 2015
Expiration dateJanuary 31, 2021
AddressCorozal, PR 00643
Receiving waterRIO LOS NEGROS
SubwatershedRio Corozal (HUC 210100020101)

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
Chlorine, total residual1158145July 31, 20182,300% over the limit
Solids, total suspended6213106July 31, 20261,889% over the limit
Nitrite + Nitrate total [as N]311396April 30, 201657,562,892% over the limit
Flow, in conduit or thru treatment plant313092October 31, 2015378% over the limit
Solids, suspended percent removal19680July 31, 2026507% over the limit
BOD, 5-day, percent removal18769December 31, 201094% over the limit
Phosphorus, total [as P]26359August 31, 2025349,000% over the limit
Enterococci05757July 31, 20261,262% over the limit
Mercury, total [as Hg]36056June 30, 20148,233% over the limit
Phenolics, total recoverable06056August 31, 200631,500% over the limit
Arsenic, total [as As]34642July 31, 200719,900% over the limit
Copper, total [as Cu]35841April 30, 20105,466% over the limit
BOD, 5-day, 20 deg. C615540July 31, 202699,999% over the limit
Coliform, fecal general25637March 31, 202199,999% over the limit
Surfactants [MBAS]33732July 31, 201243,900% over the limit
Coliform, total general23027March 31, 201599,999% over the limit
Lead, total [as Pb]32825April 30, 2010493% over the limit
Ammonia, unionized02825February 28, 2007936% over the limit
Color [PT-CO units]22523August 31, 2012
Coliform, fecal - % samples exceeding limit13821March 31, 202199,999% over the limit
pH25219January 31, 2022
Cyanide, total [as CN]03215January 31, 20084,049% over the limit
Sulfide, total [as S]01812August 31, 2002400% over the limit
Oxygen, dissolved [DO]1267February 28, 2007100% over the limit
Nitrogen, ammonia, total [as NH3]3326March 31, 201588% over the limit
Oil & Grease1276January 31, 2007115% over the limit
Turbidity2236August 31, 2012
Solids, total dissolved195July 31, 20087% over the limit
Sulfide-hydrogen sulfide [undissociated]2124June 30, 2014129,900% over the limit
Temperature, water deg. centigrade1193November 30, 20255% over the limit
Manganese, total [as Mn]073October 31, 2004254% over the limit
Solids, settleable1200
Fluoride, total [as F]070
Solids, total dissolved- 180 deg. C070
Whole Effluent Toxicity [WET] - P. promelas150
Whole Effluent Toxicity [WET] - D. magna150
Chloride [as Cl]030
2-Methyl-4,6-dinitrophenol020
2-Chlorophenol020
2,4-Dichlorophenol020
2,4-Dimethylphenol020
2,4-Dinitrophenol020
2,4,6-Trichlorophenol020
Phenol020
Pentachlorophenol020
Silver, total [as Ag]010

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
September 10, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentEP6
August 4, 2026Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangermentEP6
July 13, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
June 24, 2026Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangermentEP6
June 2, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
May 27, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
May 20, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentEP6
April 27, 2026Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangermentEP6
April 22, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
April 20, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 24, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 17, 2026Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangermentEP6
October 7, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
September 29, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
September 3, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
August 18, 2025Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangermentEP6

Velarion’s copy of EPA’s ICIS-NPDES files does not 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.

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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 PR0020451 there.

Nearby on the register

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