NPDES PR0020737 · Clean Water Act
PRASA NARANJITO WWTP, Naranjito, PR: NPDES PR0020737 discharge permit, effluent exceedances, inspections, penalties
PRASA NARANJITO WWTP, Naranjito, Puerto Rico: Individual permit PR0020737, held by PRASA NARANJITO; Publicly owned treatment works; Administratively continued; issued April 27, 2017, term to June 30, 2022; discharges to RIO GUARDIANA.
- Nitrite + Nitrate total [as N]: 0 limits, 159 violations of any kind, 154 effluent exceedances, latest April 30, 2016, largest 99,900% over the limit.
- Chlorine, total residual: 1 limit, 156 violations of any kind, 147 effluent exceedances, latest December 31, 2011, largest 1,060% over the limit.
- BOD, 5-day, 20 deg. C: 6 limits, 229 violations of any kind, 127 effluent exceedances, latest May 31, 2024, largest 1,951% over the limit.
- Phosphorus, total [as P]: 2 limits, 135 violations of any kind, 126 effluent exceedances, latest May 31, 2009, largest 2,347% over the limit.
- Solids, suspended percent removal: 1 limit, 121 violations of any kind, 108 effluent exceedances, latest February 28, 2026, largest 6,060% over the limit.
- BOD, 5-day, percent removal: 1 limit, 91 violations of any kind, 79 effluent exceedances, latest January 31, 2026, largest 213% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 111 violations of any kind, 61 effluent exceedances, latest March 31, 2016, largest 67,525% over the limit.
- Coliform, fecal general: 0 limits, 59 violations of any kind, 53 effluent exceedances, latest September 30, 2014, largest 99,999% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 62 violations of any kind, 50 effluent exceedances, latest September 30, 1995, largest 86% over the limit.
- Mercury, total [as Hg]: 2 limits, 58 violations of any kind, 50 effluent exceedances, latest September 30, 2018, largest 39,650% over the limit.
- Solids, total suspended: 6 limits, 189 violations of any kind, 48 effluent exceedances, latest February 28, 2026, largest 670% over the limit.
- Arsenic, total [as As]: 0 limits, 48 violations of any kind, 45 effluent exceedances, latest September 30, 2008, largest 699,900% over the limit.
- Coliform, total general: 0 limits, 48 violations of any kind, 42 effluent exceedances, latest October 31, 2009, largest 99,999% over the limit.
- Phenolics, total recoverable: 0 limits, 43 violations of any kind, 40 effluent exceedances, latest July 31, 2006, largest 16,800% over the limit.
- Surfactants [MBAS]: 1 limit, 49 violations of any kind, 37 effluent exceedances, latest January 31, 2006, largest 1,560% over the limit.
- Enterococci: 4 limits, 36 violations of any kind, 16 effluent exceedances, latest July 31, 2026, largest 1,762% over the limit.
- Oil & Grease: 1 limit, 32 violations of any kind, 16 effluent exceedances, latest June 30, 2005, largest 567% over the limit.
- pH: 2 limits, 39 violations of any kind, 15 effluent exceedances, latest December 31, 2012.
- Color [PT-CO units]: 2 limits, 26 violations of any kind, 14 effluent exceedances, latest June 30, 2005.
- Cyanide, total [as CN]: 0 limits, 16 violations of any kind, 12 effluent exceedances, latest April 30, 2007, largest 208% over the limit.
- Ammonia & ammonium- total: 1 limit, 24 violations of any kind, 11 effluent exceedances, latest July 31, 2026, largest 571% over the limit.
- Solids, total dissolved: 3 limits, 17 violations of any kind, 10 effluent exceedances, latest January 31, 2026, largest 36% over the limit.
- Coliform, fecal - % samples exceeding limit: 0 limits, 16 violations of any kind, 10 effluent exceedances, latest September 30, 2014, largest 14,900% over the limit.
- Nitrogen, ammonia, total [as NH3]: 0 limits, 10 violations of any kind, 10 effluent exceedances, latest September 30, 2015, largest 3,650% over the limit.
- Temperature, water deg. centigrade: 1 limit, 21 violations of any kind, 9 effluent exceedances, latest July 31, 2026, largest 6% over the limit.
- Nitrogen, ammonia total [as N]: 0 limits, 15 violations of any kind, 8 effluent exceedances, latest August 31, 2008, largest 538% over the limit.
- Sulfide-hydrogen sulfide [undissociated]: 2 limits, 22 violations of any kind, 6 effluent exceedances, latest May 31, 2026, largest 344,900% over the limit.
- Ammonia, unionized: 0 limits, 11 violations of any kind, 6 effluent exceedances, latest February 29, 2004, largest 170,900% over the limit.
- Turbidity: 1 limit, 14 violations of any kind, 5 effluent exceedances, latest September 30, 2004.
- Lead, total [as Pb]: 0 limits, 9 violations of any kind, 5 effluent exceedances, latest September 30, 2006, largest 382% over the limit.
- Manganese, total [as Mn]: 0 limits, 7 violations of any kind, 4 effluent exceedances, latest December 31, 2004, largest 610% over the limit.
- Cyanide, free available: 1 limit, 13 violations of any kind, 3 effluent exceedances, latest March 31, 2019, largest 37,478% over the limit.
- Solids, total dissolved- 180 deg. C: 0 limits, 9 violations of any kind, 2 effluent exceedances, latest January 31, 1994, largest 20% over the limit.
- Toxicity: 0 limits, 17 violations of any kind.
- Chromium, hexavalent [as Cr]: 0 limits, 14 violations of any kind.
- Nitrogen, total [as N]: 2 limits, 12 violations of any kind.
- Solids, settleable: 1 limit, 12 violations of any kind.
- Zinc, total [as Zn]: 0 limits, 8 violations of any kind.
- Copper, total [as Cu]: 2 limits, 7 violations of any kind.
- Whole Effluent Toxicity [WET] - P. promelas: 1 limit, 7 violations of any kind.
- Whole Effluent Toxicity [WET] - D. magna: 1 limit, 7 violations of any kind.
- Fluoride, total [as F]: 0 limits, 7 violations of any kind.
- Sulfide, total [as S]: 0 limits, 6 violations of any kind.
- Chromium, total [as Cr]: 0 limits, 6 violations of any kind.
- Chromium III: 0 limits, 3 violations of any kind.
- Cadmium, total [as Cd]: 0 limits, 2 violations of any kind.
- 2-Methyl-4,6-dinitrophenol: 0 limits, 2 violations of any kind.
- Whole effluent toxicity: 0 limits, 2 violations of any kind.
- 2-Chlorophenol: 0 limits, 2 violations of any kind.
- 2,4-Dichlorophenol: 0 limits, 2 violations of any kind.
- 2,4-Dimethylphenol: 0 limits, 2 violations of any kind.
- 2,4-Dinitrophenol: 0 limits, 2 violations of any kind.
- 2,4,6-Trichlorophenol: 0 limits, 2 violations of any kind.
- Phenol: 0 limits, 2 violations of any kind.
- Pentachlorophenol: 0 limits, 2 violations of any kind.
- July 21, 2026: PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)] (EP6).
- July 15, 2026: Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
- September 15, 2025: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- September 12, 2025: Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
- September 11, 2025: Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
- September 10, 2025: Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment (EP6).
- August 17, 2025: Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment (EP6).
- February 27, 2017: Management Practice Violations - Improper Operation and Maintenance (EP6).
Puerto Rico holds 34 Publicly owned treatment works coverages of this permit type in EPA’s file; 25 were issued before PR0020737. PRASA NARANJITO holds 2 permits in Puerto Rico.
Other permits held by PRASA NARANJITO
- PRASA NARANJITO, Naranjito: PRL020737, issued 2021-01-01
Coverages issued nearest PR0020737
- 2016-09-28: PRASA MAYAGUEZ WWTP, Mayaguez: PR0023795, held by PRASA MAYAGUEZ WWTP
- 2016-09-28: PRASA CAYEY WWTP, Bo.Rincon Of Cidra: PR0025356, held by PRASA CAYEY RWWTP
- 2016-09-28: PRASA VIEQUES WWTP, Vieques: PR0025453
- 2016-09-28: PRASA CAGUAS WWTP, Caguas: PR0025976, held by PRASA CAGUAS WWTP
- 2016-09-28: PRASA CULEBRA WWTP, Culebra: PR0026549, held by PRASA Culebra WWTP
- 2017-11-17: PRASA GUANICA WWTP, Guanica: PR0020486, held by PRASA GUANICA
- 2017-11-17: PRASA MAUNABO WWTP, Maunabo: PR0020656, held by PRASA MAUNABO
- 2017-11-17: PRASA PATILLAS WWTP, Patillas: PR0020753, held by PRASA PATILLAS
- 2017-11-17: PRASA SAN GERMAN WWTP, San German: PR0020818, held by PRASA SAN GERMAN
- 2017-11-17: PRASA VEGA BAJA WWTP, Vega Baja: PR0021679, held by PRASA VEGA BAJA STP
PRASA NARANJITO WWTP among its neighbors
3 discharge permits are in the Rio Guadiana subwatershed (HUC 210100050709); PR0020737 is one. Its county: 2, 0 major; PR0020737 is minor permit.
Other permits in the Rio Guadiana subwatershed (HUC 210100050709)
- DESIGN AND BUILD FOR THE COMPREHENSIVE REMODELING OF ESCUELA FRANCISCO MORALES, Naranjito: PRR1000KT, minor, term to 2027-02-16
- PRASA ANONES NARANJITO WTP, Naranjito: PR0025704, minor, term to 2007-09-30
Identity
| Facility | PRASA NARANJITO WWTP |
|---|---|
| Permittee | PRASA NARANJITO |
| NPDES ID | PR0020737 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Minor |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 27, 2017 |
| Expires | June 30, 2022 |
| Address | Naranjito, PR 00719 |
| Receiving water | RIO GUARDIANA |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rio Guadiana (HUC 210100050709) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler PRD000689778 |
NPDES PR0020737: effluent limits and exceedances
PRASA NARANJITO WWTP (NPDES PR0020737): 55 pollutants on file, 25 limited; 55 with a violation of any kind, 33 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Nitrite + Nitrate total [as N] | 0 | 159 | 154 | April 30, 2016 | 99,900% over the limit |
| Chlorine, total residual | 1 | 156 | 147 | December 31, 2011 | 1,060% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 229 | 127 | May 31, 2024 | 1,951% over the limit |
| Phosphorus, total [as P] | 2 | 135 | 126 | May 31, 2009 | 2,347% over the limit |
| Solids, suspended percent removal | 1 | 121 | 108 | February 28, 2026 | 6,060% over the limit |
| BOD, 5-day, percent removal | 1 | 91 | 79 | January 31, 2026 | 213% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 111 | 61 | March 31, 2016 | 67,525% over the limit |
| Coliform, fecal general | 0 | 59 | 53 | September 30, 2014 | 99,999% over the limit |
| Oxygen, dissolved [DO] | 1 | 62 | 50 | September 30, 1995 | 86% over the limit |
| Mercury, total [as Hg] | 2 | 58 | 50 | September 30, 2018 | 39,650% over the limit |
| Solids, total suspended | 6 | 189 | 48 | February 28, 2026 | 670% over the limit |
| Arsenic, total [as As] | 0 | 48 | 45 | September 30, 2008 | 699,900% over the limit |
| Coliform, total general | 0 | 48 | 42 | October 31, 2009 | 99,999% over the limit |
| Phenolics, total recoverable | 0 | 43 | 40 | July 31, 2006 | 16,800% over the limit |
| Surfactants [MBAS] | 1 | 49 | 37 | January 31, 2006 | 1,560% over the limit |
| Enterococci | 4 | 36 | 16 | July 31, 2026 | 1,762% over the limit |
| Oil & Grease | 1 | 32 | 16 | June 30, 2005 | 567% over the limit |
| pH | 2 | 39 | 15 | December 31, 2012 | |
| Color [PT-CO units] | 2 | 26 | 14 | June 30, 2005 | |
| Cyanide, total [as CN] | 0 | 16 | 12 | April 30, 2007 | 208% over the limit |
| Ammonia & ammonium- total | 1 | 24 | 11 | July 31, 2026 | 571% over the limit |
| Solids, total dissolved | 3 | 17 | 10 | January 31, 2026 | 36% over the limit |
| Coliform, fecal - % samples exceeding limit | 0 | 16 | 10 | September 30, 2014 | 14,900% over the limit |
| Nitrogen, ammonia, total [as NH3] | 0 | 10 | 10 | September 30, 2015 | 3,650% over the limit |
| Temperature, water deg. centigrade | 1 | 21 | 9 | July 31, 2026 | 6% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 15 | 8 | August 31, 2008 | 538% over the limit |
| Sulfide-hydrogen sulfide [undissociated] | 2 | 22 | 6 | May 31, 2026 | 344,900% over the limit |
| Ammonia, unionized | 0 | 11 | 6 | February 29, 2004 | 170,900% over the limit |
| Turbidity | 1 | 14 | 5 | September 30, 2004 | |
| Lead, total [as Pb] | 0 | 9 | 5 | September 30, 2006 | 382% over the limit |
| Manganese, total [as Mn] | 0 | 7 | 4 | December 31, 2004 | 610% over the limit |
| Cyanide, free available | 1 | 13 | 3 | March 31, 2019 | 37,478% over the limit |
| Solids, total dissolved- 180 deg. C | 0 | 9 | 2 | January 31, 1994 | 20% over the limit |
| Toxicity | 0 | 17 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 14 | 0 | ||
| Nitrogen, total [as N] | 2 | 12 | 0 | ||
| Solids, settleable | 1 | 12 | 0 | ||
| Zinc, total [as Zn] | 0 | 8 | 0 | ||
| Copper, total [as Cu] | 2 | 7 | 0 | ||
| Whole Effluent Toxicity [WET] - P. promelas | 1 | 7 | 0 | ||
| Whole Effluent Toxicity [WET] - D. magna | 1 | 7 | 0 | ||
| Fluoride, total [as F] | 0 | 7 | 0 | ||
| Sulfide, total [as S] | 0 | 6 | 0 | ||
| Chromium, total [as Cr] | 0 | 6 | 0 | ||
| Chromium III | 0 | 3 | 0 | ||
| Cadmium, total [as Cd] | 0 | 2 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 0 | 2 | 0 | ||
| Whole effluent toxicity | 0 | 2 | 0 | ||
| 2-Chlorophenol | 0 | 2 | 0 | ||
| 2,4-Dichlorophenol | 0 | 2 | 0 | ||
| 2,4-Dimethylphenol | 0 | 2 | 0 | ||
| 2,4-Dinitrophenol | 0 | 2 | 0 | ||
| 2,4,6-Trichlorophenol | 0 | 2 | 0 | ||
| Phenol | 0 | 2 | 0 | ||
| Pentachlorophenol | 0 | 2 | 0 |
NPDES PR0020737: inspections, violations and enforcement
NPDES PR0020737: 8 single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 21, 2026 | PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)] | EP6 |
| July 15, 2026 | Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | EP6 |
| September 15, 2025 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| September 12, 2025 | Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | EP6 |
| September 11, 2025 | Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | EP6 |
| September 10, 2025 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | EP6 |
| August 17, 2025 | Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | EP6 |
| February 27, 2017 | Management Practice Violations - Improper Operation and Maintenance | EP6 |
NPDES PR0020737 (PRASA NARANJITO WWTP): no inspection, formal enforcement action and informal enforcement action on file.
Watch NPDES PR0020737
NPDES PR0020737: one email when its EPA record changes — $99/month.
Permits near NPDES PR0020737
NPDES PR0020737: 55 pollutant rows, 8 dated events; ICIS-NPDES download, loaded October 14, 2026.