LARES, PR · Lares Municipio County

RIO PRIETO Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of October 14, 2009. 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 Lares 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): PR0003082
System type: Community Water System
Population served: 800
Service connections: 200
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

RIO PRIETO is one of 231 community water systems in Puerto Rico in the 501 to 3,300 people size category, formerly serving 800 people from surface water.

EPA's federal records list this system as inactive in 2009; the record below is historical.

As of August 1, 2026, its federal record holds 38 entries between 1983 and 2002, all of which EPA lists as closed. Nothing has been added since 2002.

Of the 38, 22 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 Total Coliform Rules, volatile organic chemicals, and inorganic chemicals.

Violation history

Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 2002 – May 31, 2002
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 2001 – December 31, 2001
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2001 – October 31, 2001
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2001 – March 31, 2001
Archived
Monitoring, Regular
—
Styrene
January 1, 2001 – March 31, 2001
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2000 – January 31, 2000
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
December 1, 1999 – December 31, 1999
Archived
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
December 1, 1999 – December 31, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 1999 – October 31, 1999
Archived
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
October 1, 1999 – October 31, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1999 – September 30, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1999 – August 31, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1999 – July 31, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1999 – June 30, 1999
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1999 – May 31, 1999
Archived
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
January 1, 1999 – January 31, 1999
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1998 – November 30, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
October 1, 1998 – October 31, 1998
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1998 – August 31, 1998
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1998 – June 30, 1998
Archived
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

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

Period	Violation	Contaminant / rule	Health-based	Status
May 1, 2002 – May 31, 2002	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
December 1, 2001 – December 31, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 2001 – October 31, 2001	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2001 – March 31, 2001	Monitoring, Regular	Styrene	—	Archived
January 1, 2000 – January 31, 2000	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
December 1, 1999 – December 31, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
December 1, 1999 – December 31, 1999	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1999 – October 31, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 1999 – October 31, 1999	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
September 1, 1999 – September 30, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
August 1, 1999 – August 31, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 1999 – July 31, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
June 1, 1999 – June 30, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
May 1, 1999 – May 31, 1999	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 1999 – January 31, 1999	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
November 1, 1998 – November 30, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1998 – October 31, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
August 1, 1998 – August 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
June 1, 1998 – June 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
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

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

Enforcement actions

August 22, 2006State Formal Notice of Violation issued1 linked violation
August 12, 2002State Public Notification requested1 linked violation
May 13, 2002State Public Notification requested1 linked violation
May 9, 2000State Public Notification requested1 linked violation
February 8, 2000State Public Notification requested4 linked violations
November 12, 1999State Public Notification requested3 linked violations
August 10, 1999State Public Notification requested2 linked violations
May 13, 1999State Public Notification requested3 linked violations
February 9, 1999State Public Notification requested2 linked violations
November 10, 1998State Public Notification requested1 linked violation
August 1, 1998State Public Notification received1 linked violation
October 30, 1992State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
September 10, 1913State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record

Last known contact on file (system is inactive)

RIO PRIETO

787-620-2277

LARES, PR 00669