Public water system record

Sector Los Diaz

On record as serving San Lorenzo, San Lorenzo Municipio, PR · Serves 197 people

Federal records show 1 health-based violation and 6 monitoring/reporting issues for Sector Los Diaz in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

PR0666036
SAN LORENZO
PR
197 served

System profile

Source water Groundwater

ZIP 00754

EPA system ID PR0666036

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 1
Resolved: 0
Unresolved: 1
Any acute record: No
Monitoring issues, last 10 years: 6

Key facts

Sector Los Diaz draws water from 1 well.
Most recent formal enforcement: compliance order (no penalty) by Puerto Rico, July 1998.
Record on file since 1991, with 80 health-based violations before October 19, 2016.

Check whether Sector Los Diaz serves your address

Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant	Rule family	Start date	Status	Acute
LEAD AND COPPER RULE REVISIONS Treatment technique failure	350	Oct 17, 2024	Active	No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue	Start date	Status
LEAD AND COPPER RULE REVISIONS RPT	Oct 17, 2024	Active
Lead and Copper Rule Monitoring and reporting	Jul 1, 2023	Active
Revised Total Coliform Rule Monitoring violation	Jul 1, 2022	Resolved
Revised Total Coliform Rule Monitoring violation	Jan 1, 2020	Resolved
Revised Total Coliform Rule Monitoring violation	Jul 1, 2019	Resolved
Revised Total Coliform Rule Monitoring violation	Apr 1, 2019	Resolved

Full record since 1991

EPA's records for Sector Los Diaz go back to 1991. Before October 19, 2016 they list 80 health-based violations (20 resolved, 60 archived by EPA without a recorded fix) and 60 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
1990s	42	40
2000s	28	10
2010 to October 18, 2016	10	10
October 19, 2016 to 2019	0	2
2020s	1	4

Most recent health-based violation before October 19, 2016: Total Coliform, began November 2015, Resolved.

Show all 80 health-based violations before October 19, 2016

Contaminant	Start date	Status
Total Coliform Contaminant limit exceeded	Nov 1, 2015	Resolved
Total Coliform Contaminant limit exceeded	Mar 1, 2014	Resolved
Total Coliform Contaminant limit exceeded	Feb 1, 2014	Resolved
Total Coliform Contaminant limit exceeded	Jan 1, 2014	Resolved
Total Coliform (acute) Contaminant limit exceeded	Nov 1, 2013	Resolved
Total Coliform Contaminant limit exceeded	Jul 1, 2013	Resolved
Total Coliform Contaminant limit exceeded	Nov 1, 2012	Resolved
Total Coliform Contaminant limit exceeded	Jun 1, 2011	Resolved
Total Coliform Contaminant limit exceeded	Nov 1, 2010	Archived
Total Coliform Contaminant limit exceeded	Jan 1, 2010	Archived
Total Coliform Contaminant limit exceeded	Sep 1, 2009	Archived
Total Coliform Contaminant limit exceeded	Aug 1, 2009	Archived
Total Coliform Contaminant limit exceeded	Dec 1, 2008	Resolved
Total Coliform Contaminant limit exceeded	Sep 1, 2008	Resolved
Total Coliform Contaminant limit exceeded	Aug 1, 2008	Resolved
Total Coliform (acute) Contaminant limit exceeded	Apr 1, 2008	Resolved
Total Coliform Contaminant limit exceeded	Dec 1, 2007	Resolved
Total Coliform (acute) Contaminant limit exceeded	Jun 1, 2006	Archived
Total Coliform (acute) Contaminant limit exceeded	Feb 1, 2005	Archived
Total Coliform (acute) Contaminant limit exceeded	Jan 1, 2005	Archived
Total Coliform Contaminant limit exceeded	Dec 1, 2004	Archived
Total Coliform Contaminant limit exceeded	Nov 1, 2004	Archived
Total Coliform Contaminant limit exceeded	Oct 1, 2004	Archived
Total Coliform Contaminant limit exceeded	May 1, 2004	Archived
Total Coliform Contaminant limit exceeded	Feb 1, 2004	Archived
Total Coliform Contaminant limit exceeded	Aug 1, 2003	Resolved
Total Coliform Contaminant limit exceeded	Mar 1, 2003	Resolved
Total Coliform Contaminant limit exceeded	Feb 1, 2003	Resolved
Total Coliform Contaminant limit exceeded	Jan 1, 2003	Resolved
Total Coliform Contaminant limit exceeded	Dec 1, 2002	Resolved
Total Coliform Contaminant limit exceeded	Oct 1, 2002	Resolved
Total Coliform Contaminant limit exceeded	Sep 1, 2002	Resolved
Total Coliform Contaminant limit exceeded	Aug 1, 2001	Archived
Total Coliform (acute) Contaminant limit exceeded	Sep 1, 2000	Archived
Total Coliform Contaminant limit exceeded	Aug 1, 2000	Archived
Total Coliform (acute) Contaminant limit exceeded	Jul 1, 2000	Archived
Total Coliform (acute) Contaminant limit exceeded	Feb 1, 2000	Archived
Total Coliform Contaminant limit exceeded	Jan 1, 2000	Archived
Total Coliform (acute) Contaminant limit exceeded	Dec 1, 1999	Archived
Total Coliform Contaminant limit exceeded	Nov 1, 1999	Archived
Total Coliform (acute) Contaminant limit exceeded	Oct 1, 1999	Archived
Total Coliform Contaminant limit exceeded	Aug 1, 1999	Archived
Total Coliform (acute) Contaminant limit exceeded	Jul 1, 1999	Archived
Total Coliform Contaminant limit exceeded	Mar 1, 1999	Archived
Total Coliform Contaminant limit exceeded	Feb 1, 1999	Archived
Total Coliform Contaminant limit exceeded	Jan 1, 1999	Archived
Total Coliform Contaminant limit exceeded	Dec 1, 1998	Archived
Total Coliform Contaminant limit exceeded	Nov 1, 1998	Archived
Total Coliform Contaminant limit exceeded	Sep 1, 1998	Archived
Total Coliform (acute) Contaminant limit exceeded	Aug 1, 1998	Archived

30 older violations are not listed here. EPA ECHO has the complete list.

Enforcement actions

Puerto Rico regulators took 2 formal enforcement actions against Sector Los Diaz and issued 13 boil water orders between 1990 and 1998. The most recent was a compliance order (no penalty) in July 1998.

Date	By	Action	Violations covered
Jul 28, 1998	Puerto Rico	Compliance order (no penalty)	86 violations (45 health-based): Total Coliform
Jul 27, 1998	Puerto Rico	Compliance order (no penalty)	35 violations (12 health-based): Total Coliform
Mar 19, 1993	Puerto Rico	Boil water order	1 violation (1 health-based): Total Coliform
Dec 29, 1992	Puerto Rico	Boil water order	1 violation (1 health-based): Total Coliform
Nov 20, 1992	Puerto Rico	Boil water order	1 violation (1 health-based): Total Coliform
Sep 25, 1992	Puerto Rico	Boil water order	1 violation (1 health-based): Total Coliform
Jul 21, 1992	Puerto Rico	Boil water order	1 violation (1 health-based): Total Coliform
May 19, 1992	Puerto Rico	Boil water order	1 violation (1 health-based): Total Coliform
Dec 15, 1990	Puerto Rico	Boil water order	1 violation
Oct 15, 1990	Puerto Rico	Boil water order	1 violation
Sep 14, 1990	Puerto Rico	Boil water order	1 violation
Aug 15, 1990	Puerto Rico	Boil water order	1 violation
Jul 16, 1990	Puerto Rico	Boil water order	1 violation
Jun 15, 1990	Puerto Rico	Boil water order	1 violation
May 3, 1990	Puerto Rico	Boil water order	1 violation

What the violations mean

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Sector Los Diaz draws water from 1 well.

Annual water quality report

Sector Los Diaz must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Sector Los Diaz for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Puerto Rico.

Certified drinking water labs by state EPA guidance for private wells