CIALES URBANO

Q: Is CIALES URBANO water safe to drink?

CIALES URBANO (PWS ID: PR0002752) has 264 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 4,563 people using Surface Water sources.

Q: How many people does CIALES URBANO serve?

CIALES URBANO serves 4,563 people in CIALES, Puerto Rico. It is a Local-owned system using Surface Water water sources with 1,709 service connections.

Q: What type of violations does CIALES URBANO have?

CIALES URBANO has 264 total violations: 84 health-based violations (MCL exceedances or treatment failures), 161 monitoring/reporting violations, and 40 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in CIALES URBANO water?

No. CIALES URBANO was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

Q: What water source does CIALES URBANO use?

CIALES URBANO uses Surface Water 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: PR0002752 · CIALES, Puerto Rico 00638

CIALES URBANO serves 4,563 people in CIALES, Puerto Rico using Surface Water water sources. It has 264 recorded EPA violations, including 84 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CIALES URBANO

CIALES URBANO is a local-owned community water system that delivers drinking water to 4,563 residents in CIALES, Puerto Rico (Ciales Municipio County) through 1,709 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 264 total violations for this system , of which 84 (32%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 161 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 Surface Water Treatment Rule, recorded in 28 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. CIALES URBANO's 264 violations sit below 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.

Population Served

4,563

Total Violations

264

Health-Based Violations

Water Source

Surface Water

System Details

System Type: Community
Owner Type: Local
Connections: 1,709
County: Ciales Municipio
School/Daycare: No
MCL Violations: 44
Monitoring Violations: 161
Treatment Tech Violations: 40

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Surface Water Treatment Rule	MR	28	2001
Coliform (TCR)	MCL	25	2010
Surface Water Treatment Rule	TT	23	2001
Cryptosporidium	MR	19	2019
Interim Enhanced Surface Water Treatment Rule	TT	17	2006
Total Haloacetic Acids (HAA5)	MCL	17	2018
E. COLI	MR	17	2019
Turbidity	MR	17	2019
Total Haloacetic Acids (HAA5)	MR	10	2018
TTHM	MR	10	2018
Lead and Copper Rule	MR	5	2016
Consumer Confidence Rule	Other	4	2020
cis-1,2-Dichloroethylene	MR	2	2006
DICHLOROMETHANE	MR	2	2006
o-Dichlorobenzene	MR	2	2006
Vinyl chloride	MR	2	2006
1,2-Dichloroethane	MR	2	2006
Carbon tetrachloride	MR	2	2006
1,2-Dichloropropane	MR	2	2006
Trichloroethylene	MR	2	2006
Tetrachloroethylene	MR	2	2006
Benzene	MR	2	2006
Toluene	MR	2	2006
Styrene	MR	2	2006
Xylenes, Total	MR	2	2006
trans-1,2-Dichloroethylene	MR	2	2006
1,1,1-Trichloroethane	MR	2	2006
1,1,2-Trichloroethane	MR	2	2006
Ethylbenzene	MR	2	2006
TTHM	MCL	2	2016

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFTrDA	7/23/2024	<0.007 µg/L	0.007 µg/L	Not Detected
PFDoA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	7/23/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	7/23/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFNA	7/23/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxS	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
NEtFOSAA	7/23/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFHpS	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	7/23/2024	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	7/23/2024	<0.02 µg/L	0.02 µg/L	Not Detected
lithium	7/23/2024	<9 µg/L	9 µg/L	Not Detected
NMeFOSAA	7/23/2024	<0.006 µg/L	0.006 µg/L	Not Detected
6:2 FTS	7/23/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFMBA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	7/23/2024	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	7/23/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFTA	7/23/2024	<0.008 µg/L	0.008 µg/L	Not Detected
PFEESA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
4:2 FTS	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	7/23/2024	<0.002 µg/L	0.002 µg/L	Not Detected
PFBA	7/23/2024	<0.005 µg/L	0.005 µg/L	Not Detected
HFPO-DA	7/23/2024	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	7/23/2024	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	7/23/2024	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	7/23/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFPeA	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
11Cl-PF3OUdS	4/22/2024	<0.005 µg/L	0.005 µg/L	Not Detected
9Cl-PF3ONS	4/22/2024	<0.002 µg/L	0.002 µg/L	Not Detected
ADONA	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	4/22/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	4/22/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFUnA	4/22/2024	<0.002 µg/L	0.002 µg/L	Not Detected
4:2 FTS	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	4/22/2024	<0.02 µg/L	0.02 µg/L	Not Detected
PFMPA	4/22/2024	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	4/22/2024	<0.005 µg/L	0.005 µg/L	Not Detected
6:2 FTS	4/22/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFMBA	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFEESA	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFOS	4/22/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFPeS	4/22/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpS	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	4/22/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	4/22/2024	<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 CIALES URBANO.

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 PR0002752 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 / PR0002752 / 7000
2019	Cryptosporidium	MR	19	SDWIS / PR0002752 / 3015
2019	E. COLI	MR	17	SDWIS / PR0002752 / 3014
2019	Turbidity	MR	17	SDWIS / PR0002752 / 0100
2018	Total Haloacetic Acids (HAA5)	MCL	17	SDWIS / PR0002752 / 2456
2018	Total Haloacetic Acids (HAA5)	MR	10	SDWIS / PR0002752 / 2456
2018	TTHM	MR	10	SDWIS / PR0002752 / 2950
2016	Lead and Copper Rule	MR	5	SDWIS / PR0002752 / 5000
2016	TTHM	MCL	2	SDWIS / PR0002752 / 2950
2010	Coliform (TCR)	MCL	25	SDWIS / PR0002752 / 3100
2006	Interim Enhanced Surface Water Treatment Rule	TT	17	SDWIS / PR0002752 / 0300
2006	cis-1,2-Dichloroethylene	MR	2	SDWIS / PR0002752 / 2380
2006	DICHLOROMETHANE	MR	2	SDWIS / PR0002752 / 2964
2006	o-Dichlorobenzene	MR	2	SDWIS / PR0002752 / 2968
2006	Vinyl chloride	MR	2	SDWIS / PR0002752 / 2976

How CIALES URBANO Compares

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

Metric	CIALES URBANO	Puerto Rico avg	Federal benchmark
Total violations	264	358.4	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	84	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	4,563	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 CIALES URBANO water safe to drink? ▼

CIALES URBANO (PWS ID: PR0002752) has 264 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 4,563 people using Surface Water sources.

How many people does CIALES URBANO serve? ▼

CIALES URBANO serves 4,563 people in CIALES, Puerto Rico. It is a Local-owned system using Surface Water water sources with 1,709 service connections.

What type of violations does CIALES URBANO have? ▼

CIALES URBANO has 264 total violations: 84 health-based violations (MCL exceedances or treatment failures), 161 monitoring/reporting violations, and 40 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in CIALES URBANO water? ▼

No. CIALES URBANO was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does CIALES URBANO use? ▼

CIALES URBANO 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.

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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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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial