Is SAN SEBASTIAN required to publish a Consumer Confidence Report?

Yes. SAN SEBASTIAN is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is SAN SEBASTIAN’s next Consumer Confidence Report due?

SAN SEBASTIAN’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

SAN SEBASTIAN, PR · San Sebastian Municipio County

SAN SEBASTIAN Water System

Consumer Confidence Report status

SAN SEBASTIAN must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for SAN SEBASTIAN.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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): PR0003303
System type: Community Water System
Population served: 25,752
Service connections: 9,645
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

SAN SEBASTIAN is one of 61 community water systems in Puerto Rico in the 10,001 to 100,000 people size category, serving 25,752 people from surface water.

As of August 1, 2026, its federal record holds 123 entries between 1983 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.

Of the 123, 56 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Surface Water Treatment Rules, the Stage 2 Disinfectants and Disinfection Byproducts Rule, and the Total Coliform Rules.

Violation history

Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – July 31, 2020
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2020 – June 30, 2020
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2018 – August 13, 2019
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2018 – December 31, 2018
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
April 1, 2018 – April 30, 2018
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
April 1, 2018 – April 30, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
April 1, 2018 – April 30, 2018
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
January 1, 2018 – January 31, 2018
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
January 1, 2018 – January 31, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2018 – March 31, 2018
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
January 1, 2018 – January 31, 2018
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
June 1, 2017 – June 30, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
June 1, 2017 – June 30, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
June 1, 2017 – June 30, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
May 1, 2017 – May 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
May 1, 2017 – May 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
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)
—
Cryptosporidium
January 1, 2017 – January 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
January 1, 2017 – January 31, 2017
Resolved
Monitoring, Source Water (LT2)
—
Turbidity
January 1, 2017 – January 31, 2017
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
February 1, 2016 – February 29, 2016
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2016 – March 31, 2016
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2016 – December 31, 2018
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2016 – March 31, 2016
Resolved
Monitoring, Regular
—
Carbofuran
October 1, 2015 – December 31, 2015
Resolved
Monitoring, Regular
—
OXAMYL
October 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2015 – December 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2015 – September 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2015 – September 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2015 – June 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2015 – June 30, 2015
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
April 1, 2015 – June 30, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2015 – March 31, 2015
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2015 – March 31, 2015
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2014 – December 31, 2014
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
October 1, 2014 – December 31, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2014 – December 31, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – August 8, 2014
Resolved
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2014 – September 30, 2014
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2013 – September 30, 2013
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2012 – December 31, 2018
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2011 – May 31, 2011
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2010 – September 30, 2010
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
June 1, 2010 – June 30, 2010
Archived
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
April 1, 2010 – June 30, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2010 – March 31, 2010
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
December 1, 2009 – December 31, 2009
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 2009 – November 30, 2009
Resolved
Monitoring, Source Water (LT2)
—
Cryptosporidium
November 1, 2009 – November 30, 2009
Resolved
Monitoring, Regular
—
Toxaphene
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Chlordane
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Endrin
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
BHC-GAMMA
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Heptachlor
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Heptachlor epoxide
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
October 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Methoxychlor
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
October 1, 2009 – December 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
July 1, 2009 – September 30, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Total Haloacetic Acids (HAA5)
January 1, 2009 – March 31, 2009
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
September 1, 2006 – September 30, 2006
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2006 – July 31, 2006
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2006 – May 31, 2006
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
September 1, 2005 – September 30, 2005
Archived
Monitoring and Reporting (DBP)
—
TTHM
July 1, 2005 – September 30, 2005
Archived
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2005 – March 31, 2005
Archived
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2005 – March 31, 2005
Archived
Monitoring, Regular
—
Nitrite
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 2004 – December 31, 2004
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2004 – November 30, 2004
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
July 1, 2004 – July 31, 2004
Archived
Treatment Technique Precursor Removal
Health-based
CARBON, TOTAL
July 1, 2004 – September 30, 2004
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
March 1, 2003 – March 31, 2003
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2002 – September 30, 2002
Archived
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
May 1, 2002 – May 31, 2002
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 2001 – November 30, 2001
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2001 – October 31, 2001
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2001 – September 30, 2001
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 2000 – September 30, 2000
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2000 – August 31, 2000
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 2000 – July 31, 2000
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2000 – February 29, 2000
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2000 – January 31, 2000
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 1999 – December 31, 1999
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 1999 – November 30, 1999
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 1999 – October 31, 1999
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 1999 – September 30, 1999
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
July 1, 1999 – July 31, 1999
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 1998 – December 31, 1998
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 1998 – October 31, 1998
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1998 – October 31, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1998 – September 30, 1998
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
September 1, 1998 – September 30, 1998
Archived
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
July 1, 1998 – July 31, 1998
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 1998 – March 31, 1998
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 1997 – October 31, 1997
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1997 – September 30, 1997
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 1994 – April 30, 1994
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 1994 – February 28, 1994
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 1993 – December 31, 1993
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 1993 – November 30, 1993
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 1993 – November 30, 1993
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 1993 – March 31, 1993
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1992 – October 31, 1992
Archived
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
July 1, 1992 – July 1, 1993
Resolved
Monitoring, Regular
—
Cadmium
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Selenium
September 30, 1983 – September 29, 1984
Archived
Monitoring, Regular
—
Nitrate
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
—
Barium
September 30, 1983 – September 29, 1984
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2020 – July 31, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2020 – June 30, 2020	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2018 – August 13, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
October 1, 2018 – December 31, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
April 1, 2018 – April 30, 2018	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
April 1, 2018 – April 30, 2018	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
April 1, 2018 – June 30, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
April 1, 2018 – April 30, 2018	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
January 1, 2018 – January 31, 2018	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
January 1, 2018 – January 31, 2018	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
January 1, 2018 – March 31, 2018	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2018 – January 31, 2018	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
June 1, 2017 – June 30, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
June 1, 2017 – June 30, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
June 1, 2017 – June 30, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
May 1, 2017 – May 31, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
May 1, 2017 – May 31, 2017	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
May 1, 2017 – May 31, 2017	Monitoring, Source Water (LT2)	E. COLI	—	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)	Cryptosporidium	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring, Source Water (LT2)	Turbidity	—	Resolved
February 1, 2016 – February 29, 2016	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2016 – December 31, 2018	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2016 – March 31, 2016	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2015 – December 31, 2015	Monitoring, Regular	Carbofuran	—	Resolved
October 1, 2015 – December 31, 2015	Monitoring, Regular	OXAMYL	—	Resolved
October 1, 2015 – December 31, 2015	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2015 – September 30, 2015	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
April 1, 2015 – June 30, 2015	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
April 1, 2015 – June 30, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
April 1, 2015 – June 30, 2015	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
January 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
January 1, 2015 – March 31, 2015	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
January 1, 2015 – March 31, 2015	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
October 1, 2014 – December 31, 2014	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2014 – August 8, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2014 – September 30, 2014	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
September 1, 2013 – September 30, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – December 31, 2018	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
May 1, 2011 – May 31, 2011	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2010 – September 30, 2010	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
June 1, 2010 – June 30, 2010	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
April 1, 2010 – June 30, 2010	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
December 1, 2009 – December 31, 2009	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
November 1, 2009 – November 30, 2009	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
November 1, 2009 – November 30, 2009	Monitoring, Source Water (LT2)	Cryptosporidium	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Toxaphene	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Chlordane	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Endrin	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	BHC-GAMMA	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Heptachlor	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Heptachlor epoxide	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
October 1, 2009 – December 31, 2009	Monitoring, Regular	Methoxychlor	—	Resolved
October 1, 2009 – December 31, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Total Haloacetic Acids (HAA5)	Health-based	Resolved
September 1, 2006 – September 30, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
July 1, 2006 – July 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
May 1, 2006 – May 31, 2006	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
September 1, 2005 – September 30, 2005	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
July 1, 2005 – September 30, 2005	Monitoring and Reporting (DBP)	TTHM	—	Archived
January 1, 2005 – March 31, 2005	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Archived
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Archived
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrite	—	Resolved
December 1, 2004 – December 31, 2004	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
November 1, 2004 – November 30, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 2004 – July 31, 2004	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
July 1, 2004 – September 30, 2004	Treatment Technique Precursor Removal	CARBON, TOTAL	Health-based	Archived
March 1, 2003 – March 31, 2003	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 2002 – September 30, 2002	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
May 1, 2002 – May 31, 2002	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Archived
November 1, 2001 – November 30, 2001	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 2001 – October 31, 2001	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
September 1, 2001 – September 30, 2001	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
September 1, 2000 – September 30, 2000	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
August 1, 2000 – August 31, 2000	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
July 1, 2000 – July 31, 2000	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
February 1, 2000 – February 29, 2000	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
January 1, 2000 – January 31, 2000	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 1999 – December 31, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
November 1, 1999 – November 30, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 1999 – October 31, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
September 1, 1999 – September 30, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
July 1, 1999 – July 31, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 1998 – December 31, 1998	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 1998 – October 31, 1998	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 1998 – October 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 1998 – September 30, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
September 1, 1998 – September 30, 1998	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
July 1, 1998 – July 31, 1998	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
March 1, 1998 – March 31, 1998	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 1997 – October 31, 1997	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
September 1, 1997 – September 30, 1997	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
April 1, 1994 – April 30, 1994	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
February 1, 1994 – February 28, 1994	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 1993 – December 31, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
November 1, 1993 – November 30, 1993	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
November 1, 1993 – November 30, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
March 1, 1993 – March 31, 1993	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1992 – October 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
July 1, 1992 – July 1, 1993	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
September 30, 1983 – September 29, 1984	Monitoring, Regular	Cadmium	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Selenium	—	Archived
September 30, 1983 – September 29, 1984	Monitoring, Regular	Nitrate	—	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	Barium	—	Archived

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

Enforcement actions

September 30, 2020State Compliance achieved1 linked violation
September 30, 2020State Compliance achieved1 linked violation
September 30, 2020State Compliance achieved1 linked violation
July 31, 2020State Compliance achieved1 linked violation
August 13, 2019State Compliance achieved1 linked violation
July 10, 2019State Formal Notice of Violation issued1 linked violation
March 31, 2019State Compliance achieved3 linked violations
December 31, 2018State Compliance achieved2 linked violations
December 31, 2018State Compliance achieved2 linked violations
November 30, 2018State Compliance achieved6 linked violations
August 13, 2018State Formal Notice of Violation issued6 linked violations
August 7, 2018State Civil Case filed in State court1 linked violation
May 8, 2018State Civil Case filed in State court2 linked violations
February 28, 2018State Compliance achieved3 linked violations
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
August 30, 2016State Compliance achieved1 linked violation
June 30, 2016State Compliance achieved10 linked violations
June 30, 2016State Compliance achieved13 linked violations
April 6, 2016State Other1 linked violation
March 31, 2016State Compliance achieved2 linked violations
March 9, 2016State Formal Notice of Violation issued2 linked violations
February 19, 2016State Formal Notice of Violation issued1 linked violation
September 30, 2015State Compliance achieved4 linked violations
October 31, 2014State Formal Notice of Violation issued3 linked violations
October 31, 2014State Formal Notice of Violation issued1 linked violation
October 27, 2014State Civil Case filed in State court9 linked violations
October 27, 2014State Civil Case filed in State court2 linked violations
October 27, 2014State Civil Case filed in State court2 linked violations
August 8, 2014State Compliance achieved1 linked violation
March 31, 2014State Compliance achieved1 linked violation
February 3, 2013State Formal Notice of Violation issued1 linked violation
December 1, 2011State Compliance achieved1 linked violation
October 1, 2011State Compliance achieved2 linked violations
September 30, 2011State Compliance achieved4 linked violations
June 27, 2011State Violation/Reminder Notice1 linked violation
May 31, 2010State Compliance achieved1 linked violation
March 31, 2010State Compliance achieved9 linked violations
February 4, 2010State Civil Case filed in State court3 linked violations
January 31, 2010State Compliance achieved2 linked violations
December 31, 2009State Civil Case filed in State court2 linked violations
December 31, 2009State Civil Case filed in State courtgeneral compliance action — not tied to a specific violation on record
December 31, 2008State Compliance achieved1 linked violation
June 24, 2008State Civil Case filed in State court1 linked violation
June 24, 2008State Compliance achieved1 linked violation
March 31, 2007State Compliance achieved4 linked violations
February 5, 2007State Formal Notice of Violation issued1 linked violation
August 22, 2006State Formal Notice of Violation issued3 linked violations
August 15, 2006State Public Notification requested1 linked violation
November 15, 2005State Formal Notice of Violation issued1 linked violation
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 requested1 linked violation
November 6, 2002State Public Notification requested1 linked violation
August 12, 2002State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
May 13, 2002State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 11, 2002State Public Notification requested1 linked violation
December 18, 2001State Public Notification received1 linked violation
November 13, 2001State Public Notification received1 linked violation
November 13, 2000State Public Notification requested3 linked violations
May 9, 2000State Public Notification requested3 linked violations
February 8, 2000State Public Notification requested3 linked violations
November 12, 1999State Public Notification requested3 linked violations
August 10, 1999State Public Notification requested1 linked violation
February 9, 1999State Public Notification requested4 linked violations
November 10, 1998State Public Notification requested3 linked violations
May 13, 1998State Public Notification requested1 linked violation
February 11, 1998State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
October 21, 1997State Public Notification received1 linked violation
May 8, 1996State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
August 19, 1994State Public Notification received1 linked violation
April 20, 1994State Public Notification requested1 linked violation
April 15, 1994State Administrative/Compliance Order without penalty issued9 linked violations
March 16, 1994State Violation/Reminder Notice1 linked violation
January 29, 1994State Public Notification received2 linked violations
January 28, 1994State Public Notification received2 linked violations
November 5, 1993State Public Notification received2 linked violations
November 20, 1992State Public Notification received1 linked violation
October 30, 1992State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
July 18, 1991State Public Notification requested1 linked violation
May 16, 1991State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 28, 1991State Violation/Reminder Notice1 linked violation

Common questions

Is SAN SEBASTIAN required to publish a Consumer Confidence Report?: Yes. SAN SEBASTIAN is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is SAN SEBASTIAN’s next Consumer Confidence Report due?: SAN SEBASTIAN’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SAN SEBASTIAN have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for SAN SEBASTIAN.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

SAN SEBASTIAN

787-620-2277

SAN SEBASTIAN, PR 00685