HORMIGUERO

Q: Is HORMIGUERO water safe to drink?

HORMIGUERO (PWS ID: PR0003383) has 335 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 10,541 people using Groundwater sources.

Q: How many people does HORMIGUERO serve?

HORMIGUERO serves 10,541 people in HORMIGUERO, Puerto Rico. It is a Local-owned system using Groundwater water sources with 3,948 service connections.

Q: What type of violations does HORMIGUERO have?

HORMIGUERO has 335 total violations: 15 health-based violations (MCL exceedances or treatment failures), 310 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in HORMIGUERO water?

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

Q: What water source does HORMIGUERO use?

HORMIGUERO uses Groundwater 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: PR0003383 · HORMIGUERO, Puerto Rico 00660

HORMIGUERO serves 10,541 people in HORMIGUERO, Puerto Rico using Groundwater water sources. It has 335 recorded EPA violations, including 15 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: HORMIGUERO

HORMIGUERO is a local-owned community water system that delivers drinking water to 10,541 residents in HORMIGUERO, Puerto Rico (Hormigueros Municipio County) through 3,948 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 335 total violations for this system , of which 15 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 310 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 Lead and Copper Rule, recorded in 17 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. HORMIGUERO's 335 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

10,541

Total Violations

335

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Local
Connections: 3,948
County: Hormigueros Municipio
School/Daycare: No
MCL Violations: 15
Monitoring Violations: 310
Treatment Tech Violations: 0

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Lead and Copper Rule	MR	17	2015
Coliform (TCR)	MCL	11	2003
OXAMYL	MR	8	2015
Carbofuran	MR	8	2015
BHC-GAMMA	MR	6	2000
Methoxychlor	MR	6	2000
Toxaphene	MR	6	2000
Dalapon	MR	6	2000
Diquat	MR	6	2000
Endothall	MR	6	2000
Glyphosate	MR	6	2000
Di(2-ethylhexyl) adipate	MR	6	2000
Simazine	MR	6	2000
Picloram	MR	6	2000
Dinoseb	MR	6	2000
Hexachlorocyclopentadiene	MR	6	2000
Atrazine	MR	6	2000
LASSO	MR	6	2000
Heptachlor	MR	6	2000
Heptachlor epoxide	MR	6	2000
2,4-D	MR	6	2000
2,4,5-TP	MR	6	2000
HEXACHLOROBENZENE	MR	6	2000
Benzo(a)pyrene	MR	6	2000
Pentachlorophenol	MR	6	2000
Total Polychlorinated Biphenyls (PCB)	MR	6	2000
1,2-DIBROMO-3-CHLOROPROPANE	MR	6	2000
Chlordane	MR	6	2000
Di(2-ethylhexyl) phthalate	MR	6	2000
ETHYLENE DIBROMIDE	MR	6	2000

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 300 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFDA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
ADONA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
lithium	8/28/2024	<9 µg/L	9 µg/L	Not Detected
PFHpS	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	8/28/2024	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	8/28/2024	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	8/28/2024	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFOS	8/28/2024	<0.004 µg/L	0.004 µg/L	Not Detected
HFPO-DA	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFNA	8/28/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFTrDA	8/28/2024	<0.007 µg/L	0.007 µg/L	Not Detected
NEtFOSAA	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	8/28/2024	<0.006 µg/L	0.006 µg/L	Not Detected
PFBS	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFBA	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFHxS	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFTA	8/28/2024	<0.008 µg/L	0.008 µg/L	Not Detected
PFOA	8/28/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFDoA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFUnA	8/28/2024	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
9Cl-PF3ONS	8/28/2024	<0.002 µg/L	0.002 µg/L	Not Detected
11Cl-PF3OUdS	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFPeA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
9Cl-PF3ONS	8/28/2024	<0.002 µg/L	0.002 µg/L	Not Detected
ADONA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
8:2 FTS	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFPeS	8/28/2024	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	8/28/2024	<0.02 µg/L	0.02 µg/L	Not Detected
PFMBA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	8/28/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFUnA	8/28/2024	<0.002 µg/L	0.002 µg/L	Not Detected
PFEESA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
NEtFOSAA	8/28/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFHxA	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
lithium	8/28/2024	<9 µg/L	9 µg/L	Not Detected
PFHpS	8/28/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFTrDA	8/28/2024	<0.007 µg/L	0.007 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 HORMIGUERO.

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 PR0003383 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	Nitrate	MR	4	SDWIS / PR0003383 / 1040
2022	Arsenic	MR	2	SDWIS / PR0003383 / 1005
2022	CYANIDE	MR	2	SDWIS / PR0003383 / 1024
2022	Mercury	MR	2	SDWIS / PR0003383 / 1035
2022	Beryllium, Total	MR	2	SDWIS / PR0003383 / 1075
2022	Selenium	MR	2	SDWIS / PR0003383 / 1045
2022	Chromium	MR	2	SDWIS / PR0003383 / 1020
2022	Thallium, Total	MR	2	SDWIS / PR0003383 / 1085
2022	Cadmium	MR	2	SDWIS / PR0003383 / 1015
2022	Barium	MR	2	SDWIS / PR0003383 / 1010
2022	Antimony, Total	MR	2	SDWIS / PR0003383 / 1074
2020	Consumer Confidence Rule	Other	4	SDWIS / PR0003383 / 7000
2017	TTHM	MR	2	SDWIS / PR0003383 / 2950
2017	Total Haloacetic Acids (HAA5)	MR	2	SDWIS / PR0003383 / 2456
2015	Lead and Copper Rule	MR	17	SDWIS / PR0003383 / 5000

How HORMIGUERO Compares

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

Metric	HORMIGUERO	Puerto Rico avg	Federal benchmark
Total violations	335	358.4	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	15	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	10,541	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 HORMIGUERO water safe to drink? ▼

HORMIGUERO (PWS ID: PR0003383) has 335 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 10,541 people using Groundwater sources.

How many people does HORMIGUERO serve? ▼

HORMIGUERO serves 10,541 people in HORMIGUERO, Puerto Rico. It is a Local-owned system using Groundwater water sources with 3,948 service connections.

What type of violations does HORMIGUERO have? ▼

HORMIGUERO has 335 total violations: 15 health-based violations (MCL exceedances or treatment failures), 310 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in HORMIGUERO water? ▼

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

What water source does HORMIGUERO use? ▼

HORMIGUERO 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.

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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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