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Community Water System · PWS PR0005166

Juncos - Ceiba Sur

Juncos, Puerto Rico 00777 - drinking water served from surface water sources to 36,277 people, tracked in EPA SDWIS and UCMR5.

36,277
People served
2,179
EPA violations
612
Health-based
2 PFAS
UCMR5 result

The verdict

EPA records 2,179 drinking-water violations at Juncos - Ceiba Sur, 28% of them health-based - above the Puerto Rico per-system average, and UCMR5 testing detected 2 PFAS compounds.

2,179
Total EPA violations on record
28%
Health-based (MCL / treatment failure)
36,277
People served by this system
2
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Juncos - Ceiba Sur

Juncos - Ceiba Sur is a local-owned community water system that delivers drinking water to 36,277 residents in Juncos, Puerto Rico (Juncos Municipio County) through 13,587 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 2,179 total violations for this system , of which 612 (28%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,530 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 Surface Water Treatment Rule, recorded in 299 violations (TT, health-based). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 9.8 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%).

Juncos - Ceiba Sur's 2,179 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

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

Population Served
36,277
Total Violations
2,179
Health-Based Violations
612
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
13,587
County
Juncos Municipio
School/Daycare
No
MCL Violations
112
Monitoring Violations
1,530
Treatment Tech Violations
500

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 299 2001
Interim Enhanced Surface Water Treatment Rule TT 126 2024
Coliform (TCR) MCL 80 2015
CARBON, TOTAL TT 73 2014
Tetrachloroethylene MR 59 2007
cis-1,2-Dichloroethylene MR 58 2006
DICHLOROMETHANE MR 58 2006
Vinyl chloride MR 58 2006
trans-1,2-Dichloroethylene MR 58 2006
Carbon tetrachloride MR 58 2006
Trichloroethylene MR 58 2006
Benzene MR 58 2006
Toluene MR 58 2006
Ethylbenzene MR 58 2006
Styrene MR 58 2006
Xylenes, Total MR 58 2006
o-Dichlorobenzene MR 58 2006
p-Dichlorobenzene MR 58 2006
1,2-Dichloroethane MR 58 2006
1,1,1-Trichloroethane MR 58 2006
CHLOROBENZENE MR 58 2006
1,1-Dichloroethylene MR 58 2006
1,2-Dichloropropane MR 58 2006
1,1,2-Trichloroethane MR 58 2006
1,2,4-Trichlorobenzene MR 58 2006
Lead and Copper Rule MR 55 2016
Turbidity MR 26 2017
E. COLI MR 26 2017
Cryptosporidium MR 26 2017
Total Haloacetic Acids (HAA5) MCL 25 2018

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 3 of 290 samples detected PFAS.

Contaminant Date Result MRL Status
PFDoA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 8/28/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 8/28/2023 <6.00 ppt 6.00 ppt Not Detected
PFHpA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/28/2023 <2.00 ppt 2.00 ppt Not Detected
NEtFOSAA 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/28/2023 <20.00 ppt 20.00 ppt Not Detected
PFTrDA 8/28/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 8/28/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/28/2023 9.80 ppt 5.00 ppt Detected
PFHpS 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/28/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 8/28/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 8/28/2023 <6.00 ppt 6.00 ppt Not Detected
NFDHA 8/28/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
PFOS 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
6:2 FTS 8/28/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/28/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/28/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 8/28/2023 4.80 ppt 4.00 ppt 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 Juncos - Ceiba Sur.

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 PR0005166 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 Interim Enhanced Surface Water Treatment Rule TT 126 SDWIS / PR0005166 / 0300
2020 Surface Water Treatment Rule MR 12 SDWIS / PR0005166 / 0200
2020 Consumer Confidence Rule Other 4 SDWIS / PR0005166 / 7000
2020 Long Term 2 Enhanced Surface Water Treatment Rule TT 2 SDWIS / PR0005166 / 0800
2018 Total Haloacetic Acids (HAA5) MCL 25 SDWIS / PR0005166 / 2456
2017 Turbidity MR 26 SDWIS / PR0005166 / 0100
2017 E. COLI MR 26 SDWIS / PR0005166 / 3014
2017 Cryptosporidium MR 26 SDWIS / PR0005166 / 3015
2016 Lead and Copper Rule MR 55 SDWIS / PR0005166 / 5000
2016 TTHM MCL 7 SDWIS / PR0005166 / 2950
2015 Coliform (TCR) MCL 80 SDWIS / PR0005166 / 3100
2015 Total Haloacetic Acids (HAA5) MR 8 SDWIS / PR0005166 / 2456
2015 TTHM MR 8 SDWIS / PR0005166 / 2950
2014 CARBON, TOTAL TT 73 SDWIS / PR0005166 / 2920
2014 Coliform (TCR) MR 7 SDWIS / PR0005166 / 3100

How Juncos - Ceiba Sur Compares

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

Metric Juncos - Ceiba Sur Puerto Rico avg Federal benchmark
Total violations 2,179 358.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 612 75.7 Indicates a contaminant exceeded a federal MCL
PFAS detection 2 compounds 40.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 36,277 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 Juncos - Ceiba Sur water safe to drink? ▼
Juncos - Ceiba Sur (PWS ID: PR0005166) has 2179 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 36,277 people using Surface Water sources.
How many people does Juncos - Ceiba Sur serve? ▼
Juncos - Ceiba Sur serves 36,277 people in Juncos, Puerto Rico. It is a Local-owned system using Surface Water water sources with 13,587 service connections.
What type of violations does Juncos - Ceiba Sur have? ▼
Juncos - Ceiba Sur has 2,179 total violations: 612 health-based violations (MCL exceedances or treatment failures), 1,530 monitoring/reporting violations, and 500 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Juncos - Ceiba Sur water? ▼
Yes. UCMR5 testing detected 2 PFAS compounds in Juncos - Ceiba Sur's water supply: PFBA, PFOA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Juncos - Ceiba Sur use? ▼
Juncos - Ceiba Sur uses Surface Water 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.