Velarion Records
The Pay Desk is the free weekly executive pay briefing — one company at a time, every number traceable to a public filing.
You’ll confirm on The Pay Desk’s sign-up page.

Clean Water Act discharge permit · NPDES PR0020486

PRASA GUANICA WWTP, Guanica, PR: NPDES PR0020486 discharge permit, effluent exceedances, inspections, penalties

PRASA GUANICA WWTP, held by PRASA GUANICA, holds NPDES permit PR0020486, which discharges to Bahia Guanica. EPA’s file records it issued November 17, 2017 and expiring January 31, 2023. 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 GUANICA WWTP
Permittee as filedPRASA GUANICA
NPDES IDPR0020486
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
IssuedNovember 17, 2017
Expiration dateJanuary 31, 2023
AddressGuanica, PR 00653
Receiving waterBAHIA GUANICA
SubwatershedCoastal Watersheds East of Rio Loco mouth (HUC 210100040109)

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
Enterococci4162135July 31, 202699,999% over the limit
pH29670October 31, 2024
BOD, 5-day, percent removal110358November 30, 2025287% over the limit
Solids, suspended percent removal110256December 31, 2025200% over the limit
Copper, total [as Cu]26147November 30, 20223,417% over the limit
Cyanide, total [as CN]03932November 30, 2008800% over the limit
Nitrogen, inorganic total03128November 30, 2008164,100% over the limit
BOD, 5-day, 20 deg. C68726June 30, 20254,764% over the limit
Flow, in conduit or thru treatment plant39024October 31, 2008117% over the limit
Chlorine, total residual18624August 31, 201821,767% over the limit
Cyanide, free available23624July 31, 202665,389% over the limit
Solids, total suspended68523June 30, 20254,486% over the limit
Nitrogen, total [as N]22921July 31, 2026100% over the limit
Arsenic, total [as As]02821November 30, 20083,257% over the limit
Turbidity13217October 31, 2023
Phenolics, total recoverable01514May 31, 2006850% over the limit
Oxygen, dissolved [DO]12612July 31, 2008100% over the limit
Coliform, fecal general03611May 31, 201699,900% over the limit
Zinc, total [as Zn]0227August 31, 2017226% over the limit
Oil & Grease1275January 31, 2008135% over the limit
Selenium, total [as Se]0184April 30, 2008120% over the limit
Sulfide-hydrogen sulfide [undissociated]1213April 30, 20235,090% over the limit
Temperature, water deg. centigrade1173September 30, 20253% over the limit
Lead, total [as Pb]0123May 31, 2006182% over the limit
Coliform, total general0522February 28, 2007124% over the limit
Coliform, fecal - % samples exceeding limit0152May 31, 2016400% over the limit
Surfactants [MBAS]0131January 31, 200291% over the limit
Sulfide, total [as S]0121October 31, 20078,050% over the limit
Fluoride, total [as F]081February 28, 199961% over the limit
Cadmium, total [as Cd]0170
Color [PT-CO units]1150
Solids, settleable1150
Barium, total [as Ba]0130
Boron, total [as B]0100
Chromium, hexavalent [as Cr]090
Solids, total dissolved- 180 deg. C090
Mercury, total [as Hg]090
Nitrogen, Total as NO3 + NH3080
Ammonia nitrogen, total, [as N] 30 day070
Silver, total [as Ag]070
2-Chlorophenol060
2-Methyl-4,6-dinitrophenol050
2,4-Dichlorophenol050
2,4-Dimethylphenol050
2,4-Dinitrophenol050
2,4,6-Trichlorophenol050
Phenol050
Pentachlorophenol050
Whole Effluent Toxicity [WET] - M. beryllina210
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)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
September 24, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
June 19, 2017Management Practice Violations - Improper Operation and MaintenanceEP6

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, PR0020486.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

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 PR0020486 there.

Nearby on the register

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