Clean Water Act discharge permit · NPDES PR0025551
PRASA SAN SEBASTIAN (NEW) WWTP, San Sebastian, PR: NPDES PR0025551 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 30Pollutants with an effluent exceedance
PRASA SAN SEBASTIAN (NEW) WWTP, held by PRASA SAN SEBASTIAN NEW WWTP, holds NPDES permit PR0025551, which discharges to Culebrinas River. EPA’s file records it issued September 27, 2018 and expiring January 31, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PRASA SAN SEBASTIAN (NEW) WWTP |
|---|---|
| Permittee as filed | PRASA SAN SEBASTIAN NEW WWTP |
| NPDES ID | PR0025551 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 27, 2018 |
| Expiration date | January 31, 2024 |
| Address | San Sebastian, PR 00685 |
| Receiving water | CULEBRINAS RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rio Culebrinas at mouth (HUC 210100030111) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 51Pollutants on file
- 28Under a numeric limit
- 48With a violation of any kind
- 30With an effluent exceedance
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 measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Chlorine, total residual | 1 | 125 | 108 | December 31, 2022 | 27,700% over the limit |
| Phenolics, total recoverable | 0 | 60 | 49 | May 31, 2006 | 59,100% over the limit |
| Solids, suspended percent removal | 1 | 60 | 43 | June 30, 2026 | 180% over the limit |
| Flow, in conduit or thru treatment plant | 8 | 77 | 38 | May 31, 2006 | 1,100% over the limit |
| Lead, total [as Pb] | 1 | 51 | 38 | February 28, 2015 | 16,650% over the limit |
| Color [PT-CO units] | 3 | 52 | 35 | February 29, 2016 | |
| Copper, total [as Cu] | 2 | 57 | 32 | September 30, 2013 | 3,200% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 113 | 29 | January 31, 2026 | 220% over the limit |
| Mercury, total [as Hg] | 1 | 53 | 27 | October 31, 2023 | 310% over the limit |
| Arsenic, total [as As] | 0 | 39 | 25 | February 28, 2011 | 9,344% over the limit |
| Sulfide, total [as S] | 0 | 37 | 25 | October 31, 2010 | 49,900% over the limit |
| Cyanide, total [as CN] | 0 | 36 | 24 | February 28, 2006 | 360% over the limit |
| Solids, total suspended | 6 | 106 | 21 | June 30, 2026 | 3,495% over the limit |
| Surfactants [MBAS] | 2 | 43 | 21 | March 31, 2022 | 128% over the limit |
| Coliform, fecal general | 0 | 42 | 21 | May 31, 2018 | 56,546% over the limit |
| Coliform, total general | 0 | 39 | 20 | January 31, 2017 | 99,999% over the limit |
| Coliform, fecal - % samples exceeding limit | 0 | 35 | 19 | May 31, 2018 | 400% over the limit |
| Manganese, total [as Mn] | 0 | 24 | 10 | January 31, 2006 | 124% over the limit |
| pH | 2 | 41 | 7 | July 31, 2009 | |
| BOD, 5-day, percent removal | 1 | 24 | 7 | October 31, 2025 | 507% over the limit |
| Phosphorus, total [as P] | 2 | 22 | 4 | August 31, 2016 | 35,540% over the limit |
| Nitrite + Nitrate total [as N] | 0 | 22 | 4 | November 30, 2007 | 278% over the limit |
| Sulfide-hydrogen sulfide [undissociated] | 2 | 15 | 4 | August 31, 2017 | 1,295% over the limit |
| Ammonia & ammonium- total | 1 | 11 | 4 | July 31, 2026 | 1,419% over the limit |
| Oil & Grease | 1 | 50 | 3 | September 30, 2010 | 99,999% over the limit |
| Temperature, water deg. centigrade | 1 | 20 | 3 | April 30, 2010 | 717% over the limit |
| Turbidity | 1 | 19 | 2 | September 30, 2001 | |
| Nitrogen, ammonia, total [as NH3] | 0 | 16 | 2 | January 31, 2018 | 53% over the limit |
| Solids, total dissolved- 180 deg. C | 0 | 7 | 1 | October 31, 1998 | 6% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 5 | 1 | August 31, 2004 | 565% over the limit |
| Solids, settleable | 1 | 18 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 17 | 0 | ||
| Cyanide, free available | 1 | 16 | 0 | ||
| Solids, total dissolved | 0 | 13 | 0 | ||
| Selenium, total [as Se] | 0 | 7 | 0 | ||
| Whole Effluent Toxicity [WET] - P. promelas | 2 | 6 | 0 | ||
| Whole Effluent Toxicity [WET] - D. magna | 2 | 6 | 0 | ||
| Cadmium, total [as Cd] | 0 | 6 | 0 | ||
| Silver, total [as Ag] | 0 | 6 | 0 | ||
| Fluoride, total [as F] | 0 | 5 | 0 | ||
| Chromium, total [as Cr] | 0 | 5 | 0 | ||
| Pentachlorophenol | 2 | 1 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 1 | 1 | 0 | ||
| 2-Chlorophenol | 0 | 1 | 0 | ||
| 2,4-Dichlorophenol | 0 | 1 | 0 | ||
| 2,4-Dimethylphenol | 0 | 1 | 0 | ||
| 2,4-Dinitrophenol | 0 | 1 | 0 | ||
| 2,4,6-Trichlorophenol | 0 | 1 | 0 | ||
| Enterococci | 4 | 0 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Sulfate, total [as SO4] | 2 | 0 | 0 |
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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 30, 2017 | Management Practice Violations - Improper Operation and Maintenance | EP6 |
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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.