Clean Water Act discharge permit · NPDES PR0023990
PRASA MIRADERO WTP, Mayaguez, PR: NPDES PR0023990 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 18Pollutants with an effluent exceedance
PRASA MIRADERO WTP holds NPDES permit PR0023990, which discharges to Pitillo Creek. 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 (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PRASA MIRADERO WTP |
|---|---|
| Permittee as filed | PRASA MIRADERO WTP |
| NPDES ID | PR0023990 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 17, 2017 |
| Expiration date | January 31, 2023 |
| Address | Mayaguez, PR 00680 |
| Receiving water | PITILLO CREEK |
| Subwatershed | Coastal Watersheds of Rio Grande de Anasco mouth (HUC 210100030215) |
| 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
- 34Pollutants on file
- 17Under a numeric limit
- 34With a violation of any kind
- 18With 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 |
|---|---|---|---|---|---|
| Lead, total [as Pb] | 1 | 129 | 121 | May 31, 2026 | 92,208% over the limit |
| Copper, total [as Cu] | 2 | 130 | 115 | August 31, 2012 | 19,900% over the limit |
| Turbidity | 1 | 111 | 98 | May 31, 2016 | |
| Chlorine, total residual | 1 | 80 | 64 | August 31, 2018 | 59,900% over the limit |
| Oxygen, dissolved [DO] | 1 | 65 | 49 | October 31, 2013 | 82% over the limit |
| Zinc, total [as Zn] | 0 | 55 | 48 | November 30, 2009 | 2,860% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 64 | 39 | July 31, 2010 | 107,944% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 55 | 39 | December 31, 2025 | 99,999% over the limit |
| Phosphorus, total [as P] | 2 | 48 | 36 | November 30, 2014 | 8,200% over the limit |
| Oil & Grease | 0 | 24 | 18 | November 30, 1998 | 49,900% over the limit |
| Phenolics, total recoverable | 0 | 19 | 11 | November 30, 2009 | 15,199,900% over the limit |
| Ammonia nitrogen, total, [as N] 30 day | 0 | 13 | 7 | November 30, 2009 | 318% over the limit |
| pH | 2 | 41 | 5 | October 31, 2012 | |
| Color [PT-CO units] | 1 | 22 | 5 | April 30, 2019 | |
| Nitrogen, ammonia, total [as NH3] | 0 | 8 | 3 | November 30, 2014 | 1,950% over the limit |
| Coliform, fecal general | 0 | 18 | 2 | June 30, 2002 | 99,999% over the limit |
| Ammonia & ammonium- total | 1 | 11 | 2 | March 31, 2026 | 16% over the limit |
| Temperature, water deg. centigrade | 1 | 19 | 1 | August 31, 2016 | 3% over the limit |
| Solids, settleable | 1 | 19 | 0 | ||
| Fluoride, total [as F] | 0 | 11 | 0 | ||
| Coliform, fecal - % samples exceeding limit | 0 | 9 | 0 | ||
| Sulfide, total [as S] | 0 | 8 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 0 | 7 | 0 | ||
| 2-Chlorophenol | 0 | 7 | 0 | ||
| 2,4-Dichlorophenol | 0 | 7 | 0 | ||
| 2,4-Dimethylphenol | 0 | 7 | 0 | ||
| 2,4-Dinitrophenol | 0 | 7 | 0 | ||
| 2,4,6-Trichlorophenol | 0 | 7 | 0 | ||
| Pentachlorophenol | 0 | 7 | 0 | ||
| Solids, total dissolved- 180 deg. C | 0 | 6 | 0 | ||
| Sulfate, total [as SO4] | 1 | 3 | 0 | ||
| Mercury, total [as Hg] | 1 | 3 | 0 | ||
| Whole Effluent Toxicity [WET] - P. promelas | 2 | 1 | 0 | ||
| Whole Effluent Toxicity [WET] - D. magna | 2 | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES PR0023990.
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, PR0023990.
Start the watch
- 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 PR0023990 there.
Nearby on the register
- Discharge permits in Mayaguez
- Every permit record in Mayaguez, A to Z
- Discharge permits in Puerto Rico
- Every permit record in Puerto Rico, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.