MARICAO, PR · Isabela Municipio County

LLANADAS Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of March 10, 2008. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Isabela Municipio County, PR.

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): PR0002922
System type: Community Water System
Population served: 5,404
Service connections: 1,308
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

LLANADAS is one of 71 community water systems in Puerto Rico in the 3,301 to 10,000 people size category, formerly serving 5,404 people from surface water.

EPA's federal records list this system as inactive in 2008; the record below is historical.

As of August 1, 2026, its federal record holds 40 entries between 1980 and 2005, all of which EPA lists as closed. Nothing has been added since 2005.

Of the 40, 14 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 and the Radionuclides and Revised Rad Rule.

Violation history

Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2005 – February 28, 2005
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2005 – January 31, 2005
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2004 – December 31, 2004
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
November 1, 2004 – November 30, 2004
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2004 – October 31, 2004
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2003 – December 31, 2003
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2003 – October 31, 2003
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 2003 – April 30, 2003
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 2003 – March 31, 2003
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2003 – February 28, 2003
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
January 1, 2003 – January 31, 2003
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2002 – December 31, 2002
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2002 – October 31, 2002
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2001 – December 31, 2001
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
September 1, 2001 – September 30, 2001
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
August 1, 2001 – August 31, 2001
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 2001 – June 30, 2001
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2001 – May 31, 2001
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 2000 – March 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
Monitoring of Treatment (SWTR-Filter)
—
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
August 1, 1999 – August 31, 1999
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
June 1, 1999 – June 30, 1999
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 1999 – April 30, 1999
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 1999 – January 31, 1999
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 1998 – December 31, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 1998 – November 30, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 1998 – October 31, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 1998 – September 30, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 1998 – August 31, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 1998 – July 31, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 1998 – June 30, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 1998 – May 31, 1998
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 1998 – April 30, 1998
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
September 1, 1980 – September 30, 1980
Archived

Archived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
February 1, 2005 – February 28, 2005	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
January 1, 2005 – January 31, 2005	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 2004 – December 31, 2004	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
November 1, 2004 – November 30, 2004	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 2004 – October 31, 2004	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 2003 – December 31, 2003	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 2003 – October 31, 2003	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
April 1, 2003 – April 30, 2003	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
March 1, 2003 – March 31, 2003	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
February 1, 2003 – February 28, 2003	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
January 1, 2003 – January 31, 2003	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 2002 – December 31, 2002	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
October 1, 2002 – October 31, 2002	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
December 1, 2001 – December 31, 2001	Treatment Technique (SWTR and GWR)	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
September 1, 2001 – September 30, 2001	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
August 1, 2001 – August 31, 2001	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
June 1, 2001 – June 30, 2001	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
May 1, 2001 – May 31, 2001	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
March 1, 2000 – March 31, 2000	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	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	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
September 1, 1999 – September 30, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
August 1, 1999 – August 31, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
June 1, 1999 – June 30, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
April 1, 1999 – April 30, 1999	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
January 1, 1999 – January 31, 1999	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
December 1, 1998 – December 31, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
November 1, 1998 – November 30, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
October 1, 1998 – October 31, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
September 1, 1998 – September 30, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
August 1, 1998 – August 31, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
July 1, 1998 – July 31, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
June 1, 1998 – June 30, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
May 1, 1998 – May 31, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
April 1, 1998 – April 30, 1998	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Archived
September 1, 1980 – September 30, 1980	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

November 15, 2007State Civil Case filed in State court16 linked violations
May 25, 2007State Consent Decree/Judgement13 linked violations
February 6, 2007State Formal Notice of Violation issued5 linked violations
February 5, 2007State Formal Notice of Violation issued5 linked violations
June 5, 2006State Administrative/Compliance Order without penalty issued4 linked violations
August 12, 2005State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 9, 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 requested3 linked violations
August 12, 2002State Public Notification requested3 linked violations
February 11, 2002State Public Notification requested2 linked violations
November 13, 2001State Public Notification received1 linked violation
October 4, 2001State Public Notification received1 linked violation
September 14, 2001State Public Notification received1 linked violation
August 10, 2001State Public Notification requested1 linked violation
July 19, 2001State Public Notification received1 linked violation
May 7, 2001State Public Notification requested4 linked violations
February 13, 2001State Public Notification requested3 linked violations
May 9, 2000State Public Notification requested6 linked violations
February 8, 2000State Public Notification requested1 linked violation
December 7, 1999State Administrative/Compliance Order without penalty issued2 linked violations
November 12, 1999State Public Notification requested3 linked violations
August 10, 1999State Public Notification requested2 linked violations
May 13, 1999State Public Notification requested4 linked violations
February 9, 1999State Public Notification requested3 linked violations
November 10, 1998State Public Notification requested3 linked violations
July 7, 1998State Public Notification received1 linked violation
June 19, 1998State Public Notification received1 linked violation
September 22, 1993State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
August 19, 1993State Public Notification receivedgeneral compliance action — not tied to a specific violation on record

Last known contact on file (system is inactive)

LLANADAS

787- -

MARICAO, PR 00606