GUANICA, PR · Yauco Municipio County

RIO LOCO 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): PR0004094
System type: Community Water System
Population served: 1,501
Service connections: 714
Ownership: local government
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2014 – September 30, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – August 20, 2014
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
July 1, 2013 – July 13, 2016
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2009 – March 31, 2009
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2009 – March 31, 2009
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Carbon tetrachloride
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Trichloroethylene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Tetrachloroethylene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
CHLOROBENZENE
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Benzene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Toluene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Ethylbenzene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Styrene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Vinyl chloride
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
July 1, 2005 – September 30, 2005
Archived
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
July 1, 2005 – September 30, 2005
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1998 – November 30, 1998
Archived
Monitoring, Regular
—
Dalapon
January 1, 1998 – March 31, 1998
Archived
Monitoring, Regular
—
Picloram
January 1, 1998 – March 31, 1998
Archived
Monitoring, Regular
—
Dinoseb
January 1, 1998 – March 31, 1998
Archived
Monitoring, Regular
—
2,4,5-TP
January 1, 1998 – March 31, 1998
Archived
Monitoring, Regular
—
Pentachlorophenol
January 1, 1998 – March 31, 1998
Archived
Monitoring, Regular
—
2,4-D
January 1, 1998 – March 31, 1998
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 1997 – January 1, 1998
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1994 – October 31, 1994
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1994 – September 30, 1994
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
September 1, 2014 – September 30, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2014 – August 20, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2013 – July 13, 2016	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2009 – March 31, 2009	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2009 – March 31, 2009	Monitoring, Regular	Carbofuran	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Carbon tetrachloride	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Trichloroethylene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Tetrachloroethylene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	CHLOROBENZENE	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Benzene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Toluene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Ethylbenzene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Styrene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	Vinyl chloride	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 2005 – September 30, 2005	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Archived
July 1, 2005 – September 30, 2005	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Archived
November 1, 1998 – November 30, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
January 1, 1998 – March 31, 1998	Monitoring, Regular	Dalapon	—	Archived
January 1, 1998 – March 31, 1998	Monitoring, Regular	Picloram	—	Archived
January 1, 1998 – March 31, 1998	Monitoring, Regular	Dinoseb	—	Archived
January 1, 1998 – March 31, 1998	Monitoring, Regular	2,4,5-TP	—	Archived
January 1, 1998 – March 31, 1998	Monitoring, Regular	Pentachlorophenol	—	Archived
January 1, 1998 – March 31, 1998	Monitoring, Regular	2,4-D	—	Archived
July 1, 1997 – January 1, 1998	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
October 1, 1994 – October 31, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 1994 – September 30, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived

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

Enforcement actions

July 13, 2016State no longer subject to Rule1 linked violation
March 31, 2015State Compliance achieved1 linked violation
November 5, 2014State Civil Case filed in State court1 linked violation
August 20, 2014State Compliance achieved1 linked violation
March 17, 2014State Formal Notice of Violation issued1 linked violation
June 30, 2009State Compliance achieved2 linked violations
August 23, 2006State Formal Notice of Violation issued23 linked violations
March 31, 2006State Compliance achieved21 linked violations
February 9, 1999State Public Notification requested1 linked violation
June 9, 1998State Formal Notice of Violation issued6 linked violations
May 11, 1998State Violation/Reminder Notice1 linked violation
January 1, 1998State Compliance achieved1 linked violation
November 30, 1994State Administrative/Compliance Order without penalty issued1 linked violation
November 5, 1994State Public Notification received1 linked violation
October 28, 1994State Public Notification received1 linked violation
August 19, 1994State Public Notification received1 linked violation
February 28, 1991State Violation/Reminder Notice1 linked violation

Contact

RIO LOCO

787-620-2277

GUANICA, PR 00653