Clean Water Act discharge permit · NPDES PR0025411
PRASA RIO PRIETO WTP, Yauco, PR: NPDES PR0025411 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 19Pollutants with an effluent exceedance
PRASA RIO PRIETO WTP, held by PRASA RIO PRIETO YAUCO FLT PLT, holds NPDES permit PR0025411, which discharges to Prieto River. EPA’s file records it issued September 16, 2013 and expiring November 30, 2018. 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 RIO PRIETO WTP |
|---|---|
| Permittee as filed | PRASA RIO PRIETO YAUCO FLT PLT |
| NPDES ID | PR0025411 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 16, 2013 |
| Expiration date | November 30, 2018 |
| Address | Yauco, PR 00768 |
| Receiving water | PRIETO RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rio Yauco at mouth (HUC 210100040202) |
| SIC | 4941 – Water Supply |
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
- 27Pollutants on file
- 15Under a numeric limit
- 26With a violation of any kind
- 19With 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 | 127 | 110 | May 31, 2020 | 809% over the limit |
| Copper, total [as Cu] | 3 | 101 | 80 | July 31, 2026 | 8,320% over the limit |
| Lead, total [as Pb] | 2 | 56 | 48 | December 31, 2014 | 2,500% over the limit |
| Phosphorus, total [as P] | 3 | 62 | 43 | April 30, 2025 | 15,200% over the limit |
| Turbidity | 2 | 47 | 26 | January 31, 2016 | |
| Flow, in conduit or thru treatment plant | 3 | 38 | 17 | September 30, 2009 | 425% over the limit |
| pH | 2 | 54 | 16 | July 31, 2013 | |
| BOD, 5-day, 20 deg. C | 2 | 31 | 13 | August 31, 2019 | 39,900% over the limit |
| Sulfide-hydrogen sulfide [undissociated] | 0 | 12 | 12 | November 30, 2009 | 99,900% over the limit |
| Manganese, total [as Mn] | 0 | 12 | 9 | September 30, 2000 | 766% over the limit |
| Oxygen, dissolved [DO] | 1 | 28 | 8 | April 30, 2020 | 54% over the limit |
| Arsenic, total [as As] | 0 | 11 | 8 | September 30, 2000 | 1,622% over the limit |
| Mercury, total [as Hg] | 2 | 25 | 7 | April 30, 2025 | 15,150% over the limit |
| Phenolics, total recoverable | 0 | 10 | 7 | September 30, 2000 | 11,000% over the limit |
| Zinc, total [as Zn] | 0 | 26 | 6 | January 31, 2006 | 112% over the limit |
| Color [PT-CO units] | 1 | 24 | 5 | December 31, 2018 | |
| Sulfide, total [as S] | 0 | 8 | 5 | August 31, 2000 | 1,200% over the limit |
| Ammonia & ammonium- total | 0 | 10 | 2 | June 30, 2003 | 42,890% over the limit |
| Cyanide, total [as CN] | 0 | 4 | 1 | April 30, 2000 | 15% over the limit |
| Coliform, fecal general | 0 | 25 | 0 | ||
| Oil & Grease | 0 | 20 | 0 | ||
| Temperature, water deg. centigrade | 1 | 19 | 0 | ||
| Solids, settleable | 1 | 19 | 0 | ||
| Nitrogen, ammonia, total [as NH3] | 1 | 17 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 8 | 0 | ||
| Fluoride, total [as F] | 0 | 6 | 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 29, 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.
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 PR0025411 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.