Clean Water Act discharge permit · NPDES PR0021563
PRASA PONCE WWTP, Ponce, PR: NPDES PR0021563 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 34Pollutants under a numeric limit
- 34Pollutants with an effluent exceedance
PRASA PONCE WWTP, held by PRASA PONCE STP, holds NPDES permit PR0021563, which discharges to Caribbean Sea. EPA’s file records it issued September 28, 2006 and expiring October 31, 2011. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PRASA PONCE WWTP |
|---|---|
| Permittee as filed | PRASA PONCE STP |
| NPDES ID | PR0021563 |
| 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 28, 2006 |
| Expiration date | October 31, 2011 |
| Address | Ponce, PR 00731 |
| Receiving water | CARIBBEAN SEA |
| Other EPA IDs (FRS) | RCRA handler PRD000691337 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 44Pollutants on file
- 34Under a numeric limit
- 44With a violation of any kind
- 34With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 4 | 607 | 523 | December 31, 2025 | 2,054% over the limit |
| Solids, total suspended | 4 | 596 | 502 | July 31, 2018 | 433% over the limit |
| Chlorine, total residual | 1 | 195 | 177 | March 31, 2024 | 5,900% over the limit |
| Turbidity | 1 | 162 | 148 | August 31, 2025 | |
| BOD, 5-day, percent removal | 1 | 158 | 146 | March 31, 2026 | 99,999% over the limit |
| pH | 2 | 163 | 143 | March 31, 2007 | |
| Solids, suspended percent removal | 1 | 153 | 141 | June 30, 2026 | 562% over the limit |
| Copper, total [as Cu] | 1 | 147 | 133 | August 31, 2007 | 99,900% over the limit |
| Phenolics, total recoverable | 0 | 129 | 118 | May 31, 2006 | 80,190% over the limit |
| Oil & Grease | 1 | 138 | 110 | March 31, 2007 | 49,900% over the limit |
| Nitrogen, inorganic total | 0 | 115 | 106 | March 31, 2007 | 17,900% over the limit |
| Zinc, total [as Zn] | 1 | 89 | 73 | December 31, 2021 | 90,622,432% over the limit |
| Fluoride, total [as F] | 0 | 86 | 72 | May 31, 2006 | 1,915% over the limit |
| Sulfate, total [as SO4] | 0 | 72 | 60 | March 31, 2005 | 4,900% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 192 | 56 | November 30, 2014 | 229% over the limit |
| Silver, total [as Ag] | 1 | 73 | 56 | February 28, 2007 | 2,400% over the limit |
| Coliform, fecal general | 1 | 77 | 46 | September 30, 2018 | 99,999% over the limit |
| Nitrogen, total [as N] | 1 | 62 | 46 | April 30, 2016 | 87,087% over the limit |
| Lead, total [as Pb] | 1 | 63 | 45 | April 30, 2006 | 1,441% over the limit |
| Arsenic, total [as As] | 2 | 44 | 43 | December 31, 2015 | 58,471% over the limit |
| Coliform, fecal - % samples exceeding limit | 1 | 37 | 31 | September 30, 2018 | 400% over the limit |
| Coliform, total general | 2 | 39 | 24 | June 30, 2013 | 99,999% over the limit |
| Mercury, total [as Hg] | 1 | 72 | 13 | June 30, 2019 | 145% over the limit |
| Manganese, total [as Mn] | 0 | 31 | 13 | March 31, 2006 | 252% over the limit |
| Oxygen, dissolved [DO] | 1 | 33 | 11 | April 30, 2018 | 100% over the limit |
| Cyanide, free available | 1 | 106 | 7 | June 30, 2019 | 317% over the limit |
| Nickel, total [as Ni] | 2 | 8 | 7 | April 30, 2026 | 81% over the limit |
| Selenium, total [as Se] | 0 | 18 | 4 | June 30, 2005 | 290% over the limit |
| Enterococci | 1 | 100 | 3 | September 30, 2018 | 99,999% over the limit |
| Temperature, water deg. centigrade | 1 | 22 | 1 | June 30, 2024 | 0% over the limit |
| Chromium, total [as Cr] | 0 | 18 | 1 | June 30, 2002 | 1,137% over the limit |
| Barium, total [as Ba] | 0 | 17 | 1 | April 30, 1997 | 99,999% over the limit |
| Boron, total [as B] | 0 | 17 | 1 | May 31, 1997 | 296% over the limit |
| Cadmium, total [as Cd] | 0 | 17 | 1 | October 31, 2003 | 900% over the limit |
| Enterococci - % of upper confidence limit | 1 | 134 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 95 | 0 | ||
| Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia) | 1 | 47 | 0 | ||
| NOAEL Static 48Hr Acute Cyprinodon variegatus | 1 | 47 | 0 | ||
| Color [PT-CO units] | 1 | 21 | 0 | ||
| Solids, settleable | 1 | 19 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Cyprinodeon variegatus | 1 | 19 | 0 | ||
| % Growth Reduction Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 1 | 19 | 0 | ||
| % Effect Static Chronic Arbacia punctulata | 1 | 18 | 0 | ||
| Surfactants [MBAS] | 1 | 5 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 16, 2026 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| August 27, 2025 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | 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 September 15, 2026.