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Community Water System · PWS PR0004845

Jacaboas

Patillas, Puerto Rico 00723 - drinking water served from groundwater sources to 2,654 people, tracked in EPA SDWIS and UCMR5.

2,654
People served
167
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 167 drinking-water violations at Jacaboas, 4% of them health-based - below the Puerto Rico per-system average.

167
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
2,654
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Jacaboas

Jacaboas is a local-owned community water system that delivers drinking water to 2,654 residents in Patillas, Puerto Rico (Patillas Municipio County) through 994 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 167 total violations for this system , of which 7 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 146 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 13 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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%).

Jacaboas's 167 violations sit below 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.

Population Served
2,654
Total Violations
167
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
994
County
Patillas Municipio
School/Daycare
No
MCL Violations
7
Monitoring Violations
146
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 13 2015
Coliform (TCR) MCL 7 2005
Mercury MR 7 2010
BHC-GAMMA MR 6 2018
Toxaphene MR 6 2018
Heptachlor epoxide MR 6 2018
Endrin MR 6 2018
Methoxychlor MR 6 2018
Hexachlorocyclopentadiene MR 6 2018
Heptachlor MR 6 2018
HEXACHLOROBENZENE MR 6 2018
Chlordane MR 6 2018
Carbofuran MR 5 2018
OXAMYL MR 5 2018
Dinoseb MR 4 2018
2,4,5-TP MR 4 2018
Pentachlorophenol MR 4 2018
Consumer Confidence Rule Other 4 2020
Picloram MR 4 2018
2,4-D MR 4 2018
Dalapon MR 4 2018
Di(2-ethylhexyl) phthalate MR 3 2018
1,2-DIBROMO-3-CHLOROPROPANE MR 3 2018
ETHYLENE DIBROMIDE MR 3 2018
Coliform (TCR) MR 2 2014
TTHM MR 2 2015
Total Haloacetic Acids (HAA5) MR 2 2015
Diquat MR 2 2018
Endothall MR 2 2018
Glyphosate MR 2 2018

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 Jacaboas.

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 PR0004845 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
2020 Consumer Confidence Rule Other 4 SDWIS / PR0004845 / 7000
2018 BHC-GAMMA MR 6 SDWIS / PR0004845 / 2010
2018 Toxaphene MR 6 SDWIS / PR0004845 / 2020
2018 Heptachlor epoxide MR 6 SDWIS / PR0004845 / 2067
2018 Endrin MR 6 SDWIS / PR0004845 / 2005
2018 Methoxychlor MR 6 SDWIS / PR0004845 / 2015
2018 Hexachlorocyclopentadiene MR 6 SDWIS / PR0004845 / 2042
2018 Heptachlor MR 6 SDWIS / PR0004845 / 2065
2018 HEXACHLOROBENZENE MR 6 SDWIS / PR0004845 / 2274
2018 Chlordane MR 6 SDWIS / PR0004845 / 2959
2018 Carbofuran MR 5 SDWIS / PR0004845 / 2046
2018 OXAMYL MR 5 SDWIS / PR0004845 / 2036
2018 Dinoseb MR 4 SDWIS / PR0004845 / 2041
2018 2,4,5-TP MR 4 SDWIS / PR0004845 / 2110
2018 Pentachlorophenol MR 4 SDWIS / PR0004845 / 2326

How Jacaboas Compares

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

Metric Jacaboas Puerto Rico avg Federal benchmark
Total violations 167 358.4 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 None 40.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 2,654 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 Jacaboas water safe to drink? ▼
Jacaboas (PWS ID: PR0004845) has 167 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,654 people using Groundwater sources.
How many people does Jacaboas serve? ▼
Jacaboas serves 2,654 people in Patillas, Puerto Rico. It is a Local-owned system using Groundwater water sources with 994 service connections.
What type of violations does Jacaboas have? ▼
Jacaboas has 167 total violations: 7 health-based violations (MCL exceedances or treatment failures), 146 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Jacaboas water? ▼
No PFAS testing data is available for Jacaboas under the EPA's UCMR5 monitoring program.
What water source does Jacaboas use? ▼
Jacaboas 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. 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.