RIO GRANDE, PR · Rio Grande Municipio County

EL YUNQUE Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Puerto Rico’s official records. Always confirm current status with Puerto Rico before making decisions based on this information.

System facts

System ID (PWSID): PR0005296
System type: Community Water System
Population served: 68,024
Service connections: 25,477
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2025 – October 31, 2025
Archived
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2025 – May 31, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2024 – November 30, 2024
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2023 – January 31, 2023
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2023 – January 31, 2023
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2022 – October 31, 2022
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2022 – October 31, 2022
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
September 1, 2022 – September 30, 2022
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
September 1, 2022 – September 30, 2022
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2022 – August 31, 2022
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2022 – July 31, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – July 17, 2020
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2020 – February 29, 2020
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2020 – February 29, 2020
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2019 – December 31, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2019 – December 31, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2019 – September 30, 2019
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2019 – January 31, 2019
Archived
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2018 – December 31, 2018
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
November 1, 2018 – November 30, 2018
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2018 – August 13, 2019
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2018 – June 30, 2018
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2018 – May 31, 2018
Archived
Monitoring, Source Water (LT2)
—
Cryptosporidium
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
June 1, 2017 – June 30, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
June 1, 2017 – June 30, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
June 1, 2017 – June 30, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
May 1, 2017 – May 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
May 1, 2017 – May 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
May 1, 2017 – May 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
February 1, 2017 – February 28, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
February 1, 2017 – February 28, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
February 1, 2017 – February 28, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
January 1, 2017 – January 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
January 1, 2017 – January 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
January 1, 2017 – January 31, 2017
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2016 – September 30, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2015 – September 30, 2016
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – August 13, 2014
Resolved
Monitoring, Routine (IDSE)
—
TTHM
October 1, 2013 – December 31, 2013
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 2013 – July 31, 2013
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2013 – September 30, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2013 – September 30, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2012 – September 30, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2012 – September 30, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2011 – September 30, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
October 1, 2010 – September 30, 2016
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2010 – June 30, 2010
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2010 – May 31, 2010
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2009 – September 30, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
October 1, 2008 – September 30, 2016
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2006 – December 31, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2006 – October 31, 2006
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2006 – October 31, 2006
Resolved
Monitoring, Regular
—
Mercury
October 1, 2006 – December 31, 2006
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2006 – August 31, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2006 – July 31, 2006
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2006 – September 30, 2006
Resolved
Monitoring, Regular
—
Mercury
July 1, 2006 – September 30, 2006
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2006 – June 30, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2006 – May 31, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
April 1, 2006 – April 30, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
April 1, 2006 – April 30, 2006
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2006 – June 30, 2006
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2006 – March 31, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2006 – February 28, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2006 – January 31, 2006
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2005 – December 31, 2005
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
December 1, 2005 – December 31, 2005
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2005 – November 30, 2005
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
November 1, 2005 – November 30, 2005
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
November 1, 2005 – November 30, 2005
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2005 – October 31, 2005
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2005 – December 31, 2005
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2005 – October 31, 2005
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2005 – June 30, 2005
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2005 – May 31, 2005
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
March 1, 2005 – March 31, 2005
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2005 – February 28, 2005
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2005 – January 31, 2005
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
December 1, 2004 – December 31, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
November 1, 2004 – November 30, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2004 – October 31, 2004
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2004 – October 31, 2004
Archived
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
October 1, 2004 – October 31, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
August 1, 2004 – August 31, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2004 – July 31, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2004 – June 30, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2004 – May 31, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
April 1, 2004 – April 30, 2004
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2003 – August 31, 2003
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2003 – May 31, 2003
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2003 – February 28, 2003
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
January 1, 2003 – January 31, 2003
Archived
Monitoring, Regular
—
Barium
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Selenium
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Mercury
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Fluoride
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Chromium
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Cadmium
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Arsenic
September 30, 1983 – September 29, 1984
Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2025 – October 31, 2025	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
May 1, 2025 – May 31, 2025	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
November 1, 2024 – November 30, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2023 – January 31, 2023	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2023 – January 31, 2023	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
October 1, 2022 – October 31, 2022	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
October 1, 2022 – October 31, 2022	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
September 1, 2022 – September 30, 2022	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
September 1, 2022 – September 30, 2022	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
August 1, 2022 – August 31, 2022	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2022 – July 31, 2022	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2020 – July 17, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
February 1, 2020 – February 29, 2020	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
February 1, 2020 – February 29, 2020	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
December 1, 2019 – December 31, 2019	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
October 1, 2019 – December 31, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2019 – September 30, 2019	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2019 – January 31, 2019	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 2018 – December 31, 2018	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
November 1, 2018 – November 30, 2018	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
October 1, 2018 – August 13, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
June 1, 2018 – June 30, 2018	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
May 1, 2018 – May 31, 2018	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
July 1, 2017 – July 31, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
June 1, 2017 – June 30, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
June 1, 2017 – June 30, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
June 1, 2017 – June 30, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
May 1, 2017 – May 31, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
May 1, 2017 – May 31, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
May 1, 2017 – May 31, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
February 1, 2017 – February 28, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
February 1, 2017 – February 28, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
February 1, 2017 – February 28, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
January 1, 2016 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2015 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2014 – August 13, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring, Routine (IDSE)	TTHM	—	Resolved
July 1, 2013 – July 31, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2013 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2013 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2012 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2012 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
July 1, 2011 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 1, 2010 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
June 1, 2010 – June 30, 2010	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2010 – May 31, 2010	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
April 1, 2009 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
October 1, 2008 – September 30, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
December 1, 2006 – December 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 1, 2006 – October 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 1, 2006 – October 31, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Mercury	—	Resolved
August 1, 2006 – August 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
July 1, 2006 – July 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
July 1, 2006 – September 30, 2006	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2006 – September 30, 2006	Monitoring, Regular	Mercury	—	Resolved
June 1, 2006 – June 30, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
May 1, 2006 – May 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
April 1, 2006 – April 30, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
April 1, 2006 – April 30, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
April 1, 2006 – June 30, 2006	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
March 1, 2006 – March 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
February 1, 2006 – February 28, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
January 1, 2006 – January 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
December 1, 2005 – December 31, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
December 1, 2005 – December 31, 2005	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
November 1, 2005 – November 30, 2005	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
November 1, 2005 – November 30, 2005	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
November 1, 2005 – November 30, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 1, 2005 – October 31, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 1, 2005 – December 31, 2005	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
October 1, 2005 – October 31, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
June 1, 2005 – June 30, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
May 1, 2005 – May 31, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
March 1, 2005 – March 31, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
February 1, 2005 – February 28, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
January 1, 2005 – January 31, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
December 1, 2004 – December 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
November 1, 2004 – November 30, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 1, 2004 – October 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
October 1, 2004 – October 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 2004 – October 31, 2004	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Archived
August 1, 2004 – August 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
July 1, 2004 – July 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
June 1, 2004 – June 30, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
May 1, 2004 – May 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
April 1, 2004 – April 30, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
August 1, 2003 – August 31, 2003	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
May 1, 2003 – May 31, 2003	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
February 1, 2003 – February 28, 2003	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
January 1, 2003 – January 31, 2003	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Barium	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Selenium	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Mercury	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Fluoride	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Chromium	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Cadmium	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Arsenic	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

February 19, 2026State Formal Notice of Violation issued1 linked violation
July 17, 2025State Formal Notice of Violation issued1 linked violation
June 30, 2025State Compliance achieved1 linked violation
February 10, 2025State Formal Notice of Violation issued1 linked violation
December 31, 2024State Compliance achieved1 linked violation
April 14, 2023State Formal Notice of Violation issued1 linked violation
April 14, 2023State Formal Notice of Violation issued1 linked violation
February 28, 2023State Compliance achieved1 linked violation
February 28, 2023State Compliance achieved1 linked violation
January 10, 2023State Formal Notice of Violation issued1 linked violation
January 10, 2023State Formal Notice of Violation issued1 linked violation
December 1, 2022State Formal Notice of Violation issued1 linked violation
December 1, 2022State Formal Notice of Violation issued1 linked violation
November 30, 2022State Compliance achieved3 linked violations
November 30, 2022State Compliance achieved3 linked violations
September 28, 2022State Formal Notice of Violation issued1 linked violation
September 27, 2022State Formal Notice of Violation issued1 linked violation
July 17, 2020State Compliance achieved1 linked violation
March 30, 2020State Compliance achieved4 linked violations
February 26, 2020State Formal Notice of Violation issued1 linked violation
January 31, 2020State Compliance achieved1 linked violation
October 18, 2019State Civil Case filed in State court2 linked violations
August 13, 2019State Compliance achieved1 linked violation
July 10, 2019State Formal Notice of Violation issued1 linked violation
June 30, 2019State Compliance achieved2 linked violations
March 13, 2019State Formal Notice of Violation issued1 linked violation
March 13, 2019State Formal Notice of Violation issued1 linked violation
March 13, 2019State Formal Notice of Violation issued2 linked violations
January 1, 2019State Compliance achieved2 linked violations
September 13, 2018State Formal Notice of Violation issued1 linked violation
July 20, 2018State Formal Notice of Violation issued1 linked violation
October 31, 2017State Formal Notice of Violation issued3 linked violations
August 31, 2017State Compliance achieved15 linked violations
August 16, 2017State Formal Notice of Violation issued3 linked violations
July 6, 2017State Formal Notice of Violation issued3 linked violations
May 15, 2017State Formal Notice of Violation issued6 linked violations
January 31, 2017State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 30, 2016State Compliance achieved10 linked violations
August 26, 2016State Othergeneral compliance action — not tied to a specific violation on record
February 19, 2016State Formal Notice of Violation issued1 linked violation
March 31, 2015State Formal Notice of Violation issued1 linked violation
August 13, 2014State Compliance achieved1 linked violation
July 15, 2014State Formal Notice of Violation issued1 linked violation
March 31, 2014State Compliance achieved1 linked violation
March 19, 2014State Formal Notice of Violation issued1 linked violation
January 31, 2014State Compliance achieved1 linked violation
January 31, 2014State Compliance achieved1 linked violation
October 24, 2013State Formal Notice of Violation issued1 linked violation
June 21, 2013State Compliance achieved1 linked violation
January 1, 2013State Compliance achieved1 linked violation
October 29, 2012State Formal Notice of Violation issued1 linked violation
May 3, 2012State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 11, 2011State Formal Notice of Violation issued1 linked violation
December 31, 2010State Compliance achieved2 linked violations
December 2, 2010State Formal Notice of Violation issued1 linked violation
December 2, 2010State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
December 2, 2010State Formal Notice of Violation issued1 linked violation
August 25, 2009State Formal Notice of Violation issued2 linked violations
March 24, 2009State Compliance achieved2 linked violations
January 1, 2009State Compliance achieved1 linked violation
December 8, 2008State Formal Notice of Violation issued2 linked violations
September 4, 2008State Formal Notice of Violation issued2 linked violations
June 24, 2008State Civil Case filed in State court2 linked violations
February 26, 2008State Formal Notice of Violation issued2 linked violations
November 16, 2007State Formal Notice of Violation issued2 linked violations
November 15, 2007State Civil Case filed in State court14 linked violations
September 30, 2007State Compliance achieved3 linked violations
June 30, 2007State Compliance achieved15 linked violations
April 30, 2007State Compliance achieved1 linked violation
April 30, 2007State Compliance achieved1 linked violation
March 31, 2007State Compliance achieved2 linked violations
March 15, 2007State Consent Decree/Judgement28 linked violations
August 15, 2006State Public Notification requested4 linked violations
July 31, 2006State Compliance achieved2 linked violations
November 14, 2005State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
August 12, 2005State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
October 4, 2004State Public Notification requested2 linked violations
August 12, 2004State Public Notification requested3 linked violations
November 14, 2003State Public Notification requested1 linked violation
August 14, 2003State Public Notification requested1 linked violation
May 12, 2003State Public Notification requestedgeneral compliance action — not tied to a specific violation on record

Contact

EL YUNQUE

787-620-2277

RIO GRANDE, PR 00745