Puerto Rico

Water quality data from the EPA Safe Drinking Water Information System

Lead Risk: Elevated

Water Systems

1,000

Active public water systems

Population Served

3.33M

Residents with piped water

Lead Violations

Systems exceeding 15 ppb

Copper Violations

Lead & Copper Rule

Average Lead Level

7.76 ppb

EPA Action Level: 15 ppb

MCLG (health goal): 0 ppb

0 ppbAction Level: 15 ppb

Average across 386 systems with reported lead data.

Violations Detected

106 water systems in Puerto Rico have reported violations under the Lead and Copper Rule. These utilities are required to notify customers and take corrective action.

50 lead violations56 copper violations⚠ 1 school/daycare system affected

Schools & Daycares

3 school or daycare water systems identified in this state. 1 have active violations.

Children are especially vulnerable to lead exposure. Schools are required to test for lead and remediate violations.

Water Systems: Highest Lead Levels

System Name	City	Population	Lead Level	Status	Sample Date
ARROYOSchool/Daycare	ARROYO	21,524	16.00 ppb	Violation	1993-06-30
VEGA ALTA URBANO	VEGA ALTA	34,559	15.00 ppb	OK	1993-06-30
YABUCOA URBANO	YABUCOA	14,610	11.60 ppb	OK	2016-12-31
LOS CANOS	GUANICA	15,937	10.70 ppb	OK	2012-12-31
GURABO URBANO	GURABO	24,967	10.00 ppb	OK	2014-12-31
SAN GERMAN	SAN GERMAN	25,576	9.00 ppb	OK	2009-12-31
PATILLAS URBANO	PATILLAS	31,955	8.00 ppb	OK	2014-12-31
DORADO URBANO	DORADO	39,733	7.00 ppb	OK	2016-12-31
MANATI URBANO	MANATI	15,244	7.00 ppb	OK	2010-12-31
METROPOLITANO	SAN JUAN	1,077,332	6.00 ppb	OK	2016-12-31
MAYAGUEZ	MAYAGUEZ	151,555	6.00 ppb	OK	2015-12-31
AGUADILLA	AGUADILLA	123,885	6.00 ppb	OK	2015-12-31
PONCE URBANO	PONCE	111,926	6.00 ppb	OK	2014-12-31
RIO BLANCO,VIEQUES,CULEDRA	NAGUABO	80,759	6.00 ppb	OK	2016-12-31
EL YUNQUE	RIO GRANDE	68,024	6.00 ppb	OK	2016-12-31

Showing top 15 of 386 systems with lead data. Action level: 15 ppb.

Systems With Active Violations

These water systems have exceeded EPA limits and must take corrective action.

MAYAGUEZ

MAYAGUEZ · Pop. 151,555

Copper

Lead: 6.00 ppb (2015-12-31)

RIO BLANCO,VIEQUES,CULEDRA

NAGUABO · Pop. 80,759

Copper

Lead: 6.00 ppb (2016-12-31)

ARECIBO URBANO

ARECIBO · Pop. 61,119

Copper

Lead: 6.00 ppb (2016-12-31)

FAJARDO CEIBA

FAJARDO · Pop. 58,011

Copper

Lead: 6.00 ppb (2014-12-31)

DORADO URBANO

DORADO · Pop. 39,733

Copper

Lead: 7.00 ppb (2016-12-31)

JUNCOS - CEIBA SUR

JUNCOS · Pop. 36,277

Copper

Lead: 6.00 ppb (2016-12-31)

CAGUAS SUR

CAGUAS · Pop. 33,231

Copper

Lead: 6.00 ppb (2014-12-31)

SAN LORENZO URBANO

SAN LORENZO · Pop. 26,094

Copper

Lead: 6.00 ppb (2014-12-31)

LAGO GUAJATACA

ISABELA · Pop. 11,187

Copper

Lead: 6.00 ppb (2016-12-31)

ARROYO

ARROYO · Pop. 21,524

Lead

Lead: 16.00 ppb (1993-06-30)

Water Source Types

Groundwater536 (54%)

Surface Water458 (46%)

Purchased Surface Water3 (0%)

Unknown2 (0%)

Groundwater Under Influence of SW1 (0%)

Resources

EPA Water Data Reports

Official drinking water data and reports

Lead in Drinking Water

EPA guidance on lead risks and remediation

Learn About Lead Contamination

Health effects, filtering options, and more

Data source:EPA Safe Drinking Water Information System (SDWIS), Lead and Copper Rule monitoring data. Lead levels represent 90th percentile results from the most recent monitoring period. Violations indicate exceedances of EPA action levels requiring corrective action. This tool is for informational purposes only and does not replace your utility's official Consumer Confidence Report.