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Clean Water Act discharge permit · NPDES PR0020923

PRASA VEGA ALTA WWTP, Vega Alta, PR: NPDES PR0020923 discharge permit, effluent exceedances, inspections, penalties

PRASA VEGA ALTA WWTP, held by PRASA VEGA ALTA, holds NPDES permit PR0020923, which discharges to Rio Cibuco. 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 VEGA ALTA WWTP
Permittee as filedPRASA VEGA ALTA
NPDES IDPR0020923
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
AddressVega Alta, PR 00762
Receiving waterRIO CIBUCO
Receiving water impaired303(D) Listed
SubwatershedRio Cibuco near mouth (HUC 210100020106)

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 residual1152141March 31, 2022266,567% over the limit
Solids, suspended percent removal1119102October 31, 2024513% over the limit
BOD, 5-day, percent removal111396October 31, 2024353% over the limit
Solids, total suspended619490February 29, 202416,225% over the limit
Arsenic, total [as As]010490September 30, 20152,777,678% over the limit
BOD, 5-day, 20 deg. C617376January 31, 202499,999% over the limit
Ammonia, unionized05853May 31, 200625,900% over the limit
Coliform, fecal general27350January 31, 202299,999% over the limit
Flow, in conduit or thru treatment plant37545February 29, 201698% over the limit
Copper, total [as Cu]26243May 31, 201599,999% over the limit
Coliform, total general04136August 31, 201599,999% over the limit
Mercury, total [as Hg]24132May 31, 201449,999,900% over the limit
Coliform, fecal - % samples exceeding limit14331January 31, 202299,999% over the limit
Phosphorus, total [as P]24028June 30, 20253,200% over the limit
Phenolics, total recoverable03227March 31, 20051,299,900% over the limit
Surfactants [MBAS]02317January 31, 201577,128% over the limit
Oxygen, dissolved [DO]13115November 30, 2021100% over the limit
Nitrite + Nitrate total [as N]02113November 30, 20114,940% over the limit
Cyanide, total [as CN]02010December 31, 200457,592% over the limit
Nitrogen, ammonia, total [as NH3]2169June 30, 2015104% over the limit
Cadmium, total [as Cd]0238December 31, 200495,594% over the limit
Sulfide-hydrogen sulfide [undissociated]2117July 31, 20155,900% over the limit
Color [PT-CO units]2166July 31, 2012
Temperature, water deg. centigrade1195May 31, 20232% over the limit
pH2264March 31, 2017
Oil & Grease1224May 31, 20089,900% over the limit
Manganese, total [as Mn]0154December 31, 200431,900% over the limit
Turbidity1104January 31, 2021
Sulfide, total [as S]062October 31, 200799,900% over the limit
Nitrogen, total [as N]2150
Solids, settleable1130
Fluoride, total [as F]0130
Whole Effluent Toxicity [WET] - P. promelas1100
Whole Effluent Toxicity [WET] - D. magna1100
Chloride [as Cl]080
Solids, total dissolved- 180 deg. C060
Cyanide, free available230
Lead, total [as Pb]020
Chromium III020
Pentachlorophenol010

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 8, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentEP6
August 11, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
July 31, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
July 21, 2026PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)]EP6
July 15, 2026Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangermentEP6
April 28, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
April 7, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
April 6, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 12, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
February 27, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
February 4, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
February 2, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
January 28, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
January 7, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
December 27, 2025Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangermentEP6
December 17, 2025Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environmentEP6
November 20, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
November 19, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
November 13, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 14, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 8, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
September 19, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
September 17, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
September 15, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
September 13, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
August 21, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
August 17, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
February 16, 2017Management Practice Violations - Improper Operation and MaintenanceEP6
February 16, 2017WW SSO - Discharge to WatersEP6

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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Nearby on the register

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