JACAGUAS

Q: Is JACAGUAS water safe to drink?

JACAGUAS (PWS ID: PR0004534) has 732 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 3 PFAS compounds found. This system serves 4,269 people using Groundwater sources.

Q: How many people does JACAGUAS serve?

JACAGUAS serves 4,269 people in JUANA DIAZ, Puerto Rico. It is a Local-owned system using Groundwater water sources with 1,599 service connections.

Q: What type of violations does JACAGUAS have?

JACAGUAS has 732 total violations: 7 health-based violations (MCL exceedances or treatment failures), 720 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in JACAGUAS water?

Yes. UCMR5 testing detected 3 PFAS compounds in JACAGUAS's water supply: PFOS, PFHxS, PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.

Q: What water source does JACAGUAS use?

JACAGUAS uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Q: Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Reviewed byPlainWater Editorial, Drinking Water Quality Editorial Team · June 4, 2026

PWS ID: PR0004534 · JUANA DIAZ, Puerto Rico 00795

JACAGUAS serves 4,269 people in JUANA DIAZ, Puerto Rico using Groundwater water sources. It has 732 recorded EPA violations, including 7 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (3 compounds found).

Water Quality Snapshot: JACAGUAS

JACAGUAS is a local-owned community water system that delivers drinking water to 4,269 residents in JUANA DIAZ, Puerto Rico (Juana Diaz Municipio County) through 1,599 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 732 total violations for this system , of which 7 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 720 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 62 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 3 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 0.0124 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Puerto Rico, EPA tracks 458 public water systems serving 3,328,141 people, with 164,144 cumulative violations and 34,657 health-based violations on record. About 100% of systems in the state carry at least one violation, and state-wide the average per system is 358.4 violations. JACAGUAS's 732 violations sit above the Puerto Rico average. Statewide, 40 of 99 UCMR5-tested systems have reported PFAS detections (40.4%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

3 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served

4,269

Total Violations

732

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Local
Connections: 1,599
County: Juana Diaz Municipio
School/Daycare: No
MCL Violations: 7
Monitoring Violations: 720
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Lead and Copper Rule	MR	62	2016
Xylenes, Total	MR	16	2017
p-Dichlorobenzene	MR	16	2017
1,1-Dichloroethylene	MR	16	2017
1,1,1-Trichloroethane	MR	16	2017
Carbon tetrachloride	MR	16	2017
1,2-Dichloropropane	MR	16	2017
Benzene	MR	16	2017
Toluene	MR	16	2017
Ethylbenzene	MR	16	2017
Styrene	MR	16	2017
1,2,4-Trichlorobenzene	MR	16	2017
cis-1,2-Dichloroethylene	MR	16	2017
trans-1,2-Dichloroethylene	MR	16	2017
Tetrachloroethylene	MR	16	2017
CHLOROBENZENE	MR	16	2017
o-Dichlorobenzene	MR	16	2017
1,2-Dichloroethane	MR	16	2017
Trichloroethylene	MR	16	2017
DICHLOROMETHANE	MR	16	2017
1,1,2-Trichloroethane	MR	16	2017
Vinyl chloride	MR	16	2017
Methoxychlor	MR	12	2014
Toxaphene	MR	12	2014
HEXACHLOROBENZENE	MR	12	2014
Total Polychlorinated Biphenyls (PCB)	MR	12	2014
Chlordane	MR	12	2014
Endrin	MR	12	2014
Heptachlor	MR	12	2014
Heptachlor epoxide	MR	12	2014

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 180 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFPeS	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NMeFOSAA	8/21/2023	<0.006 µg/L	0.006 µg/L	Not Detected
PFDA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFBS	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFHxS	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFNA	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
lithium	8/21/2023	<9 µg/L	9 µg/L	Not Detected
PFOA	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
NEtFOSAA	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFDoA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	8/21/2023	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
9Cl-PF3ONS	8/21/2023	<0.002 µg/L	0.002 µg/L	Not Detected
ADONA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFEESA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	8/21/2023	<0.02 µg/L	0.02 µg/L	Not Detected
PFHpS	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFTA	8/21/2023	<0.008 µg/L	0.008 µg/L	Not Detected
PFTrDA	8/21/2023	<0.007 µg/L	0.007 µg/L	Not Detected
PFOS	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFPeA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFBA	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
8:2 FTS	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
PFHxS	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFNA	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	8/21/2023	0.0048 µg/L	0.004 µg/L	Detected
PFOA	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFDA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	8/21/2023	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
9Cl-PF3ONS	8/21/2023	<0.002 µg/L	0.002 µg/L	Not Detected
PFBS	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
lithium	8/21/2023	<9 µg/L	9 µg/L	Not Detected
6:2 FTS	8/21/2023	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	8/21/2023	<0.004 µg/L	0.004 µg/L	Not Detected
PFMBA	8/21/2023	<0.003 µg/L	0.003 µg/L	Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for JACAGUAS.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID PR0004534 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Puerto Rico Drinking Water Authority

Puerto Rico's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find PR regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest)	Contaminant	Category	Count	EPA Record
2024	Nitrate	MR	9	SDWIS / PR0004534 / 1040
2022	Thallium, Total	MR	3	SDWIS / PR0004534 / 1085
2022	Barium	MR	2	SDWIS / PR0004534 / 1010
2022	Cadmium	MR	2	SDWIS / PR0004534 / 1015
2022	Mercury	MR	2	SDWIS / PR0004534 / 1035
2022	Beryllium, Total	MR	2	SDWIS / PR0004534 / 1075
2022	Selenium	MR	2	SDWIS / PR0004534 / 1045
2022	Arsenic	MR	2	SDWIS / PR0004534 / 1005
2022	Antimony, Total	MR	2	SDWIS / PR0004534 / 1074
2022	Chromium	MR	2	SDWIS / PR0004534 / 1020
2022	CYANIDE	MR	2	SDWIS / PR0004534 / 1024
2020	Consumer Confidence Rule	Other	4	SDWIS / PR0004534 / 7000
2017	Xylenes, Total	MR	16	SDWIS / PR0004534 / 2955
2017	p-Dichlorobenzene	MR	16	SDWIS / PR0004534 / 2969
2017	1,1-Dichloroethylene	MR	16	SDWIS / PR0004534 / 2977

How JACAGUAS Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric	JACAGUAS	Puerto Rico avg	Federal benchmark
Total violations	732	358.4	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	7	75.7	Indicates a contaminant exceeded a federal MCL
PFAS detection	3 compounds	40.4%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	4,269	7,267	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 458 regulated public water systems in Puerto Rico.

Federal MCL reference — Safe Drinking Water Act thresholds ▼

Contaminant	Federal MCL / Action Level	Note
Lead	0 mg/L (Action Level: 0.015 mg/L)	Lead and Copper Rule treatment technique
Arsenic	0.010 mg/L (10 ppb)	Health-based MCL since 2006
Total Coliform	Treatment technique (RTCR)	Indicator organism, monitoring trigger
PFOA / PFOS (PFAS)	4.0 ppt each (final 2024 rule)	Compliance deadline 2029
Nitrate (as N)	10 mg/L	Acute health risk for infants

Frequently Asked Questions

Is JACAGUAS water safe to drink? ▼

JACAGUAS (PWS ID: PR0004534) has 732 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 3 PFAS compounds found. This system serves 4,269 people using Groundwater sources.

How many people does JACAGUAS serve? ▼

JACAGUAS serves 4,269 people in JUANA DIAZ, Puerto Rico. It is a Local-owned system using Groundwater water sources with 1,599 service connections.

What type of violations does JACAGUAS have? ▼

JACAGUAS has 732 total violations: 7 health-based violations (MCL exceedances or treatment failures), 720 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in JACAGUAS water? ▼

Yes. UCMR5 testing detected 3 PFAS compounds in JACAGUAS's water supply: PFOS, PFHxS, PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.

What water source does JACAGUAS use? ▼

JACAGUAS uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from? ▼

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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