Clean Water Act discharge permit · NPDES PR0026638
PRASA ISABELA WTP, Isabela, PR: NPDES PR0026638 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
PRASA ISABELA WTP, held by PRASA Isabela WTP, holds NPDES permit PR0026638, which discharges to Guajataca Reservoir. EPA’s file records it issued June 28, 2018 and expiring July 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 ISABELA WTP |
|---|---|
| Permittee as filed | PRASA Isabela WTP |
| NPDES ID | PR0026638 |
| 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 | June 28, 2018 |
| Expiration date | July 31, 2023 |
| Address | Isabela, PR 00662 |
| Receiving water | Guajataca reservoir |
| Subwatershed | Non-contributing area-Name not assigned (HUC 210100020507) |
| 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
- 26Pollutants on file
- 19Under a numeric limit
- 26With a violation of any kind
- 11With 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 | 2 | 36 | 23 | February 28, 2026 | 2,279% over the limit |
| Chlorine, total residual | 1 | 29 | 16 | December 31, 2025 | 1,100% over the limit |
| Phosphorus, total [as P] | 3 | 25 | 12 | June 30, 2026 | 109% over the limit |
| Arsenic, total [as As] | 2 | 15 | 10 | July 31, 2010 | 7,844% over the limit |
| Copper, total [as Cu] | 2 | 21 | 8 | April 30, 2010 | 1,722% over the limit |
| Zinc, total [as Zn] | 2 | 18 | 4 | November 30, 2020 | 2,521% over the limit |
| Color [PT-CO units] | 3 | 16 | 3 | June 30, 2018 | |
| Turbidity | 2 | 16 | 3 | November 30, 2022 | |
| Nitrogen, total [as N] | 2 | 6 | 2 | July 31, 2026 | 308% over the limit |
| Lead, total [as Pb] | 2 | 6 | 2 | June 30, 2010 | 179% over the limit |
| Oxygen, dissolved [DO] | 2 | 14 | 1 | May 31, 2020 | 11% over the limit |
| pH | 4 | 26 | 0 | ||
| Sulfate, total [as SO4] | 3 | 15 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 15 | 0 | ||
| Temperature, water deg. centigrade | 2 | 13 | 0 | ||
| Solids, settleable | 1 | 13 | 0 | ||
| Silver, total [as Ag] | 0 | 12 | 0 | ||
| Oil & Grease | 0 | 11 | 0 | ||
| Selenium, total [as Se] | 0 | 11 | 0 | ||
| Nitrogen, ammonia, total [as NH3] | 0 | 9 | 0 | ||
| Solids, total dissolved | 0 | 9 | 0 | ||
| Sulfide-hydrogen sulfide [undissociated] | 0 | 8 | 0 | ||
| Whole Effluent Toxicity [WET] - D. magna | 1 | 4 | 0 | ||
| Whole Effluent Toxicity [WET] - P. promelas | 1 | 3 | 0 | ||
| Ammonia & ammonium- total | 1 | 3 | 0 | ||
| Fluoride, total [as F] | 0 | 2 | 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 PR0026638.
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, PR0026638.
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 PR0026638 there.
Nearby on the register
- Discharge permits in Isabela
- Every permit record in Isabela, 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.