Is COQUI required to publish a Consumer Confidence Report?

Yes. COQUI 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 COQUI’s next Consumer Confidence Report due?

COQUI’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.

SALINAS, PR · Salinas Municipio County

COQUI Water System

Consumer Confidence Report status

COQUI 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 COQUI.

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): PR0004915
System type: Community Water System
Population served: 6,237
Service connections: 2,336
Ownership: local government
Water source: groundwater (wells)

COQUI is one of 71 community water systems in Puerto Rico in the 3,301 to 10,000 people size category, serving 6,237 people from groundwater.

As of August 1, 2026, its federal record holds 143 entries between 1992 and 2025, all of which EPA lists as closed.

Of the 143, 129 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 synthetic organic chemicals, inorganic chemicals, and volatile organic chemicals.

Violation history

Monitoring, Source Water (GWR)
—
E. COLI
October 1, 2025 – September 30, 2025
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 1, 2025 – September 30, 2025
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 1, 2025 – September 30, 2025
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Nitrate
July 1, 2024 – September 30, 2024
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2024 – June 30, 2024
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2024 – March 31, 2024
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2020 – August 6, 2020
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
July 1, 2019 – September 30, 2019
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
July 1, 2019 – September 30, 2019
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2018 – August 13, 2019
Resolved
Monitoring, Regular
—
Methoxychlor
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Endrin
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Picloram
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Simazine
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
OXAMYL
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Endothall
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Diquat
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Dalapon
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Chlordane
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
2,4,5-TP
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
2,4-D
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Heptachlor epoxide
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Heptachlor
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
LASSO
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Atrazine
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Carbofuran
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Dinoseb
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
Toxaphene
April 1, 2018 – June 30, 2018
Resolved
Monitoring, Regular
—
BHC-GAMMA
April 1, 2018 – June 30, 2018
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – September 25, 2014
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2014 – June 30, 2014
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 2014 – June 30, 2014
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2014 – June 30, 2014
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2013 – December 31, 2013
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2013 – December 31, 2013
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2013 – October 18, 2019
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Mercury
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2013 – December 31, 2013
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2013 – December 31, 2013
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2012 – October 18, 2019
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2011 – December 31, 2011
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2011 – October 18, 2019
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
January 1, 2009 – October 18, 2019
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2008 – January 31, 2008
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2007 – March 31, 2007
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2006 – January 1, 2007
Resolved
Monitoring, Regular
—
Nitrate
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Endrin
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
BHC-GAMMA
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Methoxychlor
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Toxaphene
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Dalapon
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Diquat
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Endothall
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Glyphosate
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
OXAMYL
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Simazine
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Picloram
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Dinoseb
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Carbofuran
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Atrazine
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
LASSO
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Heptachlor
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Heptachlor epoxide
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
2,4-D
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
2,4,5-TP
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Pentachlorophenol
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Total Polychlorinated Biphenyls (PCB)
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Chlordane
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
July 1, 2006 – September 30, 2006
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
July 1, 2006 – September 30, 2006
Resolved
Monitoring, Regular
—
Nitrate
April 1, 2006 – June 30, 2006
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Styrene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Toluene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Benzene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2005 – December 31, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2005 – January 31, 2005
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2005 – December 31, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2004 – August 31, 2004
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 2003 – October 31, 2003
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2003 – June 30, 2003
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2003 – January 31, 2003
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2000 – October 31, 2000
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 1998 – December 31, 1998
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 1998 – November 30, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1998 – September 30, 1998
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1998 – July 31, 1998
Archived
Monitoring, Regular
—
Nitrite
July 1, 1997 – September 30, 1997
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
January 1, 1997 – January 31, 1997
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1994 – October 31, 1994
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

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
October 1, 2025 – September 30, 2025	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2025 – September 30, 2025	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
October 1, 2025 – September 30, 2025	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2024 – September 30, 2024	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2024 – June 30, 2024	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2020 – August 6, 2020	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2019 – September 30, 2019	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
July 1, 2019 – September 30, 2019	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
October 1, 2018 – August 13, 2019	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Methoxychlor	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Endrin	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Picloram	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Simazine	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	OXAMYL	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Endothall	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Diquat	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Dalapon	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Chlordane	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	2,4,5-TP	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	2,4-D	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Heptachlor epoxide	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Heptachlor	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	LASSO	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Atrazine	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Carbofuran	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Dinoseb	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	Toxaphene	—	Resolved
April 1, 2018 – June 30, 2018	Monitoring, Regular	BHC-GAMMA	—	Resolved
July 1, 2014 – September 25, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2013 – December 31, 2013	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
July 1, 2013 – October 18, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Mercury	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2013 – December 31, 2013	Monitoring, Regular	Arsenic	—	Resolved
July 1, 2012 – October 18, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
December 1, 2011 – December 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2011 – October 18, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2009 – October 18, 2019	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2008 – January 31, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2007 – March 31, 2007	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2006 – January 1, 2007	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Endrin	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	BHC-GAMMA	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Methoxychlor	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Toxaphene	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Dalapon	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Diquat	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Endothall	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Glyphosate	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	OXAMYL	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Simazine	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Picloram	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Dinoseb	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Carbofuran	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Atrazine	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	LASSO	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Heptachlor	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Heptachlor epoxide	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	2,4-D	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	2,4,5-TP	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Pentachlorophenol	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Total Polychlorinated Biphenyls (PCB)	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring, Regular	Chlordane	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
April 1, 2006 – June 30, 2006	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Styrene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Toluene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Benzene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2005 – January 31, 2005	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 2005 – December 31, 2005	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Trichloroethylene	—	Resolved
August 1, 2004 – August 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 2003 – October 31, 2003	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
June 1, 2003 – June 30, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 2003 – January 31, 2003	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 2000 – October 31, 2000	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
December 1, 1998 – December 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
November 1, 1998 – November 30, 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
July 1, 1998 – July 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 1997 – September 30, 1997	Monitoring, Regular	Nitrite	—	Archived
January 1, 1997 – January 31, 1997	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1994 – October 31, 1994	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

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

Enforcement actions

November 12, 2025State Formal Notice of Violation issued3 linked violations
September 30, 2025State Compliance achieved3 linked violations
December 31, 2024State Compliance achieved2 linked violations
December 10, 2024State Formal Notice of Violation issued4 linked violations
December 10, 2024State Formal Notice of Violation issued2 linked violations
December 10, 2024State Formal Notice of Violation issued1 linked violation
September 30, 2024State Compliance achieved1 linked violation
September 30, 2024State Compliance achieved1 linked violation
June 30, 2024State Compliance achieved3 linked violations
August 6, 2020State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 6, 2020State Compliance achieved1 linked violation
October 18, 2019State Compliance achieved4 linked violations
September 30, 2019State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 30, 2019State Compliance achieved2 linked violations
August 13, 2019State Compliance achieved1 linked violation
July 10, 2019State Formal Notice of Violation issued1 linked violation
September 30, 2018State Compliance achieved29 linked violations
May 13, 2015State Compliance achieved17 linked violations
September 30, 2014State Compliance achieved2 linked violations
September 30, 2014State Compliance achieved3 linked violations
September 25, 2014State Compliance achieved1 linked violation
September 9, 2014State Compliance achieved4 linked violations
September 9, 2014State Compliance achieved17 linked violations
August 21, 2014State Formal Notice of Violation issued32 linked violations
July 15, 2014State Formal Notice of Violation issued2 linked violations
April 9, 2014State Formal Notice of Violation issued17 linked violations
March 17, 2014State Formal Notice of Violation issued1 linked violation
February 6, 2013State Formal Notice of Violation issued1 linked violation
June 30, 2012State Compliance achieved1 linked violation
December 11, 2011State Formal Notice of Violation issued1 linked violation
August 25, 2009State Formal Notice of Violation issued1 linked violation
March 24, 2009State Compliance achieved31 linked violations
December 8, 2008State Formal Notice of Violation issued31 linked violations
September 4, 2008State Formal Notice of Violation issued31 linked violations
July 31, 2008State Compliance achieved1 linked violation
June 24, 2008State Civil Case filed in State court1 linked violation
February 26, 2008State Formal Notice of Violation issued31 linked violations
November 16, 2007State Formal Notice of Violation issued31 linked violations
August 16, 2007State Formal Notice of Violation issued2 linked violations
June 30, 2007State Compliance achievedgeneral compliance action — not tied to a specific violation on record
June 30, 2007State Compliance achieved2 linked violations
March 31, 2007State Compliance achieved29 linked violations
January 1, 2007State Compliance achieved1 linked violation
December 31, 2006State Compliance achieved23 linked violations
September 30, 2006State Compliance achieved3 linked violations
August 23, 2006State Formal Notice of Violation issued22 linked violations
October 4, 2004State Public Notification requested1 linked violation
February 9, 2004State Public Notification requested1 linked violation
August 14, 2003State Public Notification requested3 linked violations
May 12, 2003State Public Notification requested1 linked violation
February 13, 2001State Public Notification requested1 linked violation
February 7, 2001State Violation/Reminder Notice1 linked violation
February 9, 1999State Public Notification requested2 linked violations
November 10, 1998State Public Notification requested2 linked violations
November 4, 1997State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
March 3, 1997State Public Notification received1 linked violation
November 30, 1994State Formal Notice of Violation issued1 linked violation
November 20, 1992State Public Notification received1 linked violation

Common questions

Is COQUI required to publish a Consumer Confidence Report?: Yes. COQUI 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 COQUI’s next Consumer Confidence Report due?: COQUI’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does COQUI have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for COQUI.
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

COQUI

787-620-2277

SALINAS, PR 00751