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Clean Water Act discharge permit · NPDES PR0020818

PRASA SAN GERMAN WWTP, San German, PR: NPDES PR0020818 discharge permit, effluent exceedances, inspections, penalties

PRASA SAN GERMAN WWTP, held by PRASA SAN GERMAN, holds NPDES permit PR0020818, which discharges to Rio Guanajibo. 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 SAN GERMAN WWTP
Permittee as filedPRASA SAN GERMAN
NPDES IDPR0020818
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
AddressSan German, PR 00683
Receiving waterRIO GUANAJIBO
Receiving water impaired303(D) Listed
SubwatershedRio Guanajibo at mouth (HUC 210100030409)

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 residual1136123September 30, 20201,809% over the limit
Color [PT-CO units]2128114June 30, 2026
Arsenic, total [as As]08570September 30, 2015444,344% over the limit
Surfactants [MBAS]18063April 30, 2027 (as filed; later than the file's load date)41,243,172% over the limit
Ammonia & ammonium- total112862July 31, 202648,502% over the limit
Flow, in conduit or thru treatment plant39153April 30, 200663% over the limit
Coliform, fecal general06451December 31, 201399,999% over the limit
Phosphorus, total [as P]36449June 30, 202649,256% over the limit
Solids, total suspended612344June 30, 20241,478% over the limit
Nitrite + Nitrate total [as N]05242March 31, 200945,100% over the limit
Solids, suspended percent removal15641June 30, 2025840% over the limit
Solids, total dissolved- 180 deg. C04640February 28, 20073,154% over the limit
Coliform, total general05239December 31, 201399,999% over the limit
BOD, 5-day, 20 deg. C611836November 30, 202399,999% over the limit
Coliform, fecal - % samples exceeding limit04334July 31, 2016400% over the limit
BOD, 5-day, percent removal14126November 30, 2023173% over the limit
Phenolics, total recoverable03724May 31, 200636,400% over the limit
Nitrogen, ammonia, total [as NH3]02116January 31, 2018259,900% over the limit
Oxygen, dissolved [DO]12914September 30, 202550% over the limit
Copper, total [as Cu]12913July 31, 2020473% over the limit
Sulfide-hydrogen sulfide [undissociated]17410February 28, 20171,954,400% over the limit
Mercury, total [as Hg]02610March 31, 2013412% over the limit
Lead, total [as Pb]02310October 31, 2007949% over the limit
Heptachlor0227January 31, 2015138% over the limit
Cyanide, total [as CN]0186February 28, 200684,515% over the limit
Manganese, total [as Mn]0315January 31, 2004340% over the limit
Cadmium, total [as Cd]0275July 31, 200518% over the limit
Enterococci4175July 31, 20261,762% over the limit
Selenium, total [as Se]0274January 31, 2006540% over the limit
Zinc, total [as Zn]0234October 31, 2007872% over the limit
Turbidity1183September 30, 2008
Nitrogen, total [as N]2113July 31, 2026561% over the limit
Cyanide, free available0113November 30, 2011245,977% over the limit
Chloride [as Cl]093June 30, 200048% over the limit
Sulfide, total [as S]0162January 31, 20019,900% over the limit
Fluoride, total [as F]0102April 30, 200342,757% over the limit
pH2311December 31, 2002
Silver, total [as Ag]0241October 31, 2007216% over the limit
Nickel, total [as Ni]0590
Chromium, hexavalent [as Cr]0530
Oil & Grease1210
Temperature, water deg. centigrade1150
Solids, settleable1150
Chromium, total [as Cr]060
2-Methyl-4,6-dinitrophenol050
2-Chlorophenol050
2,4-Dichlorophenol050
2,4-Dimethylphenol050
2,4-Dinitrophenol050
2,4,6-Trichlorophenol050
Pentachlorophenol050
Whole Effluent Toxicity [WET] - P. promelas110
Whole Effluent Toxicity [WET] - D. magna110

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 3, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
August 18, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
August 18, 2026Dry-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
June 30, 2026Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
June 17, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
May 26, 2026Wet-weather SSO discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 18, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 9, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
March 1, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
February 22, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
February 19, 2026Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
January 5, 2026Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
December 14, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
December 10, 2025Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
October 23, 2025Wet-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangermentEP6
June 14, 2017Management Practice Violations - Improper Operation and MaintenanceEP6

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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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 PR0020818 there.

Nearby on the register

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