MAUNABO URBANO

Q: Is MAUNABO URBANO water safe to drink?

MAUNABO URBANO (PWS ID: PR0004815) has 564 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 9,310 people using Surface Water sources.

Q: How many people does MAUNABO URBANO serve?

MAUNABO URBANO serves 9,310 people in MAUNABO, Puerto Rico. It is a Local-owned system using Surface Water water sources with 3,487 service connections.

Q: What type of violations does MAUNABO URBANO have?

MAUNABO URBANO has 564 total violations: 72 health-based violations (MCL exceedances or treatment failures), 482 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in MAUNABO URBANO water?

Yes. UCMR5 testing detected 2 PFAS compounds in MAUNABO URBANO's water supply: PFOS, PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.

Q: What water source does MAUNABO URBANO use?

MAUNABO 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: PR0004815 · MAUNABO, Puerto Rico 00707

MAUNABO URBANO serves 9,310 people in MAUNABO, Puerto Rico using Surface Water water sources. It has 564 recorded EPA violations, including 72 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (2 compounds found).

Water Quality Snapshot: MAUNABO URBANO

MAUNABO URBANO is a local-owned community water system that delivers drinking water to 9,310 residents in MAUNABO, Puerto Rico (Maunabo Municipio County) through 3,487 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 564 total violations for this system , of which 72 (13%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 482 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 68 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 0.0048 ppt. 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. MAUNABO URBANO's 564 violations sit above 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.

PFAS Detected

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

Population Served

9,310

Total Violations

564

Health-Based Violations

Water Source

Surface Water

System Details

System Type: Community
Owner Type: Local
Connections: 3,487
County: Maunabo Municipio
School/Daycare: No
MCL Violations: 71
Monitoring Violations: 482
Treatment Tech Violations: 1

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Lead and Copper Rule	MR	68	2018
Coliform (TCR)	MCL	43	2014
Cryptosporidium	MR	33	2019
Turbidity	MR	26	2019
E. COLI	MR	26	2019
Total Haloacetic Acids (HAA5)	MCL	20	2016
Mercury	MR	15	2010
Nitrate	MR	9	2010
TTHM	MCL	8	2017
Gross Alpha, Excl. Radon and U	MR	7	2018
BHC-GAMMA	MR	6	2018
Methoxychlor	MR	6	2018
Diquat	MR	6	2018
Endothall	MR	6	2018
Glyphosate	MR	6	2018
OXAMYL	MR	6	2018
Picloram	MR	6	2018
Hexachlorocyclopentadiene	MR	6	2018
Carbofuran	MR	6	2018
LASSO	MR	6	2018
Heptachlor	MR	6	2018
Heptachlor epoxide	MR	6	2018
2,4-D	MR	6	2018
2,4,5-TP	MR	6	2018
Pentachlorophenol	MR	6	2018
Total Polychlorinated Biphenyls (PCB)	MR	6	2018
1,2-DIBROMO-3-CHLOROPROPANE	MR	6	2018
Chlordane	MR	6	2018
Toxaphene	MR	6	2018
Dalapon	MR	6	2018

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 3 of 360 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFBA	8/27/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFDoA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	8/27/2025	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	8/27/2025	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	8/27/2025	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	8/27/2025	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	8/27/2025	<0.005 µg/L	0.005 µg/L	Not Detected
9Cl-PF3ONS	8/27/2025	<0.002 µg/L	0.002 µg/L	Not Detected
ADONA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
11Cl-PF3OUdS	8/27/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFHxA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpS	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	8/27/2025	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	8/27/2025	<0.004 µg/L	0.004 µg/L	Not Detected
NEtFOSAA	8/27/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFTrDA	8/27/2025	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	8/27/2025	<0.008 µg/L	0.008 µg/L	Not Detected
6:2 FTS	8/27/2025	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	8/27/2025	<0.006 µg/L	0.006 µg/L	Not Detected
PFNA	8/27/2025	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxS	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	8/27/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	8/27/2025	<0.002 µg/L	0.002 µg/L	Not Detected
8:2 FTS	8/25/2025	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	8/25/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFMBA	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFBA	8/25/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFMPA	8/25/2025	<0.004 µg/L	0.004 µg/L	Not Detected
PFPeA	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	8/25/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFEESA	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	8/25/2025	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpS	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFTA	8/25/2025	<0.008 µg/L	0.008 µg/L	Not Detected
PFTrDA	8/25/2025	<0.007 µg/L	0.007 µg/L	Not Detected
NEtFOSAA	8/25/2025	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	8/25/2025	<0.006 µg/L	0.006 µg/L	Not Detected
PFDoA	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
ADONA	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
NFDHA	8/25/2025	<0.02 µg/L	0.02 µg/L	Not Detected
PFHxS	8/25/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	8/25/2025	<0.002 µg/L	0.002 µg/L	Not Detected
9Cl-PF3ONS	8/25/2025	<0.002 µg/L	0.002 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 MAUNABO 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 PR0004815 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 / PR0004815 / 7000
2019	Cryptosporidium	MR	33	SDWIS / PR0004815 / 3015
2019	Turbidity	MR	26	SDWIS / PR0004815 / 0100
2019	E. COLI	MR	26	SDWIS / PR0004815 / 3014
2019	Public Notice	Other	3	SDWIS / PR0004815 / 7500
2018	Lead and Copper Rule	MR	68	SDWIS / PR0004815 / 5000
2018	Gross Alpha, Excl. Radon and U	MR	7	SDWIS / PR0004815 / 4000
2018	BHC-GAMMA	MR	6	SDWIS / PR0004815 / 2010
2018	Methoxychlor	MR	6	SDWIS / PR0004815 / 2015
2018	Diquat	MR	6	SDWIS / PR0004815 / 2032
2018	Endothall	MR	6	SDWIS / PR0004815 / 2033
2018	Glyphosate	MR	6	SDWIS / PR0004815 / 2034
2018	OXAMYL	MR	6	SDWIS / PR0004815 / 2036
2018	Picloram	MR	6	SDWIS / PR0004815 / 2040
2018	Hexachlorocyclopentadiene	MR	6	SDWIS / PR0004815 / 2042

How MAUNABO URBANO Compares

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

Metric	MAUNABO URBANO	Puerto Rico avg	Federal benchmark
Total violations	564	358.4	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	72	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	9,310	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 MAUNABO URBANO water safe to drink? ▼

MAUNABO URBANO (PWS ID: PR0004815) has 564 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 9,310 people using Surface Water sources.

How many people does MAUNABO URBANO serve? ▼

MAUNABO URBANO serves 9,310 people in MAUNABO, Puerto Rico. It is a Local-owned system using Surface Water water sources with 3,487 service connections.

What type of violations does MAUNABO URBANO have? ▼

MAUNABO URBANO has 564 total violations: 72 health-based violations (MCL exceedances or treatment failures), 482 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in MAUNABO URBANO water? ▼

Yes. UCMR5 testing detected 2 PFAS compounds in MAUNABO URBANO's water supply: PFOS, PFBS. PFAS are persistent "forever chemicals" that do not break down in the environment.

What water source does MAUNABO URBANO use? ▼

MAUNABO 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.

Explore PlainWater

Water in Puerto Rico

All systems in state

All States

Water quality by state

Contaminants

PFAS & other pollutants

Guides

Understanding water quality

Related Data for Puerto Rico

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →

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.

Browse all → | Rankings →

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