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Community Water System · PWS PR0004534

Jacaguas

Juana Diaz, Puerto Rico 00795 - drinking water served from groundwater sources to 4,269 people, tracked in EPA SDWIS and UCMR5.

4,269
People served
732
EPA violations
7
Health-based
3 PFAS
UCMR5 result

The verdict

EPA records 732 drinking-water violations at Jacaguas, 1% of them health-based - above the Puerto Rico per-system average, and UCMR5 testing detected 3 PFAS compounds.

732
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
4,269
People served by this system
3
PFAS compounds detected (UCMR5)

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 12.4 ppt (parts per trillion). 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. Statewide, 40 of 99 UCMR5-tested systems have reported PFAS detections (40.4%).

Jacaguas's 732 violations sit above the Puerto Rico average.

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
7
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 174 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 8/21/2023 <6.00 ppt 6.00 ppt Not Detected
PFDA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFBS 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxS 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/21/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 8/21/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/21/2023 <20.00 ppt 20.00 ppt Not Detected
PFHpS 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/21/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 8/21/2023 <7.00 ppt 7.00 ppt Not Detected
PFOS 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxS 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/21/2023 4.80 ppt 4.00 ppt Detected
PFOA 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/21/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 8/21/2023 <2.00 ppt 2.00 ppt Not Detected
PFBS 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 8/21/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/21/2023 <4.00 ppt 4.00 ppt Not Detected
PFMBA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/21/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/21/2023 <20.00 ppt 20.00 ppt 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 (EPA proposed extending to 2031, not yet final as of May 2026)
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.
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.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.