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. EPA SDWIS lists this system's service population as 36,277 people using Surface Water sources.

How many people does Juncos - Ceiba Sur serve?

EPA SDWIS reports that Juncos - Ceiba Sur serves 36,277 people (this public water system's service population, not the municipal population of Juncos or any other city). It is a Local-owned system using Surface Water water sources with 13,587 service connections. The operator address is listed in Juncos, Puerto Rico.

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.

Where does Juncos - Ceiba Sur sit among U.S. public water systems?

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Juncos - Ceiba Sur ranks #1,534 of 29,740 by people served, and #16 of 235 in Puerto Rico. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

How does Juncos - Ceiba Sur's violation count compare nationally?

Juncos - Ceiba Sur has 2,179 recorded EPA SDWIS violations, fewer than 0% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 100% of that cohort has fewer violations than Juncos - Ceiba Sur. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → Puerto Rico

Community Water System · PWS PR0005166

Juncos - Ceiba Sur

Operator location Juncos, Puerto Rico - 28% of 2,179 violations are health-based (upper-third health share (> 23%)); surface water source; 36,277 served per SDWIS.

Compiled by PlainWater · May 15, 2026

36,277
People served (this PWS) Larger third of systems: 2,179
EPA violations (this PWS) Upper third of systems: 612
Health-based (this PWS) Upper third by health-based share: 2 PFAS
UCMR5 (this PWS) Lower third of PFAS-detected systems

Follow published updates (RSS)

Juncos - Ceiba Sur standing, high SDWIS violation third

28% of 2,179 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 28% is upper-third health share (> 23%). UCMR5: lower-third PFAS panel (≤ 2 compounds). Population rank #1,534 of 29,740 among systems serving 500+.

The verdict

Juncos - Ceiba Sur sits in the upper third of the sitemap cohort by violation count (2,179), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (36,277; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 28% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 2 PFAS compounds (lower-third PFAS panel (≤ 2 compounds)).

#1,534 of 29,740
Population · /systems: #16 of 235
Population · PR: 2,179
Total EPA violations on record: 28%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

PFAS Detected

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

Water Safety Score

13/100

Juncos - Ceiba Sur

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations F

612

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

1,567

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination D

0.0098 µg/L

Highest PFAS compound level detected in UCMR5 testing

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

Violation Count vs. the National Corpus

Juncos - Ceiba Sur has 2,179 recorded EPA violations, 100% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 0% carry more. 28% of this system's own violations are health-based (612 of 2,179), and it ranks #1,534 of 29,740 by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

2,179 Higher than most more violations than 99%+ of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

How many violations vs. how serious, among peer systems

Juncos - Ceiba Sur plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Juncos - Ceiba Sur. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

City of Ballinger: 372 violations, 85% health-based
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Juncos - Ceiba Sur: 2,179 violations, 28% health-based (this system)
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based

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

Health-based violations on Juncos - Ceiba Sur

612 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for PR0005166.

EPA SDWIS · PWS PR0005166

Sources: EPA SDWIS

Nationwide peers

2,179 violations · 36,277 served: nearest cross-state SDWIS matches.

Cross-state systems with comparable violation load

Nearest cross-state community systems (500+ served) by total SDWIS violations on record.

4 peers

Cross-state systems with similar served population

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Juncos - Ceiba Sur

Use this system's EPA-reported record as a starting filter, not a final verdict.

See how every tracked system in Puerto Rico compares on the same EPA violation measures. Puerto Rico systems
Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
Find and compare another public water system by name or PWSID. Search systems

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

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

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

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