Clean Water Act discharge permit · NPDES PR0022870
PRASA SAN LORENZO WTP, San Lorenzo, PR: NPDES PR0022870 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 20Pollutants under a numeric limit
- 23Pollutants with an effluent exceedance
PRASA SAN LORENZO WTP, held by PRASA San Lorenzo WTP, holds NPDES permit PR0022870, which discharges to R Grnd De Loiza. EPA’s file records it issued September 29, 2015 and expiring January 31, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PRASA SAN LORENZO WTP |
|---|---|
| Permittee as filed | PRASA San Lorenzo WTP |
| NPDES ID | PR0022870 |
| 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 29, 2015 |
| Expiration date | January 31, 2021 |
| Address | San Lorenzo, PR 00754 |
| Receiving water | R GRND DE LOIZA |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rio Grande de Loiza at Carraizo Dam (HUC 210100050409) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 38Pollutants on file
- 20Under a numeric limit
- 38With a violation of any kind
- 23With 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 |
|---|---|---|---|---|---|
| Copper, total [as Cu] | 2 | 119 | 100 | April 30, 2016 | 2,757% over the limit |
| Chlorine, total residual | 1 | 111 | 94 | May 31, 2019 | 5,300% over the limit |
| Lead, total [as Pb] | 2 | 103 | 88 | February 29, 2024 | 7,275% over the limit |
| Turbidity | 2 | 80 | 63 | February 28, 2026 | |
| Phenolics, total recoverable | 0 | 68 | 55 | November 30, 2008 | 47,400% over the limit |
| Arsenic, total [as As] | 0 | 59 | 45 | November 30, 2011 | 21,567% over the limit |
| Phosphorus, total [as P] | 2 | 58 | 40 | April 30, 2026 | 4,900% over the limit |
| Manganese, total [as Mn] | 0 | 48 | 35 | November 30, 2008 | 5,860% over the limit |
| Sulfate, total [as SO4] | 2 | 29 | 25 | January 31, 2003 | 29,100% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 40 | 23 | August 31, 2014 | 340% over the limit |
| Cadmium, total [as Cd] | 2 | 38 | 23 | May 31, 2006 | 2,400% over the limit |
| Zinc, total [as Zn] | 0 | 29 | 21 | January 31, 2009 | 276% over the limit |
| Mercury, total [as Hg] | 2 | 39 | 16 | June 30, 2017 | 33,233% over the limit |
| Cyanide, total [as CN] | 0 | 21 | 9 | August 31, 2006 | 362% over the limit |
| Flow, in conduit or thru treatment plant | 3 | 45 | 8 | November 30, 2011 | 63,459% over the limit |
| Color [PT-CO units] | 1 | 23 | 7 | May 31, 2018 | |
| Sulfide, total [as S] | 0 | 19 | 6 | May 31, 2007 | 99,900% over the limit |
| Cyanide, free available | 2 | 8 | 3 | October 31, 2011 | 43,575% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 8 | 3 | February 28, 2007 | 83% over the limit |
| pH | 2 | 39 | 2 | August 31, 2010 | |
| Coliform, fecal general | 0 | 19 | 1 | September 30, 2009 | 69% over the limit |
| Fluoride, total [as F] | 0 | 10 | 1 | December 31, 1998 | 3,757% over the limit |
| Coliform, fecal - % samples exceeding limit | 0 | 8 | 1 | September 30, 2009 | 100% over the limit |
| Temperature, water deg. centigrade | 1 | 19 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 19 | 0 | ||
| Solids, settleable | 1 | 19 | 0 | ||
| Nitrogen, ammonia, total [as NH3] | 1 | 17 | 0 | ||
| Oil & Grease | 2 | 7 | 0 | ||
| Whole Effluent Toxicity [WET] - P. promelas | 1 | 3 | 0 | ||
| Whole Effluent Toxicity [WET] - D. magna | 1 | 3 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 2 | 0 | ||
| 2,4-Dinitrophenol | 0 | 2 | 0 | ||
| 2,4,6-Trichlorophenol | 0 | 2 | 0 | ||
| Pentachlorophenol | 0 | 2 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 0 | 1 | 0 | ||
| 2-Chlorophenol | 0 | 1 | 0 | ||
| 2,4-Dichlorophenol | 0 | 1 | 0 | ||
| 2,4-Dimethylphenol | 0 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 12, 2017 | Permit Violations - Discharge Without a Valid Permit | 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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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 PR0022870 there.
Nearby on the register
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- Every permit record in Puerto Rico, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.