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SANTA ISABEL

PWS ID: PR0003712 · UTUADO, Puerto Rico 00641

SANTA ISABEL serves 3,335 people in UTUADO, Puerto Rico using Surface Water water sources. It has 281 recorded EPA violations, including 95 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: SANTA ISABEL

SANTA ISABEL is a local-owned community water system that delivers drinking water to 3,335 residents in UTUADO, Puerto Rico (Utuado Municipio County) through 1,249 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 281 total violations for this system , of which 95 (34%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 170 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 67 violations (TT, health-based). 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. SANTA ISABEL's 281 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
3,335
Total Violations
281
Health-Based Violations
95
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
1,249
County
Utuado Municipio
School/Daycare
No
MCL Violations
12
Monitoring Violations
170
Treatment Tech Violations
83

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 67 2001
Cryptosporidium MR 28 2018
Turbidity MR 24 2018
E. COLI MR 24 2018
Interim Enhanced Surface Water Treatment Rule TT 16 2004
TTHM MR 14 2017
Total Haloacetic Acids (HAA5) MR 14 2017
Coliform (TCR) MCL 12 2008
Surface Water Treatment Rule MR 6 2022
Lead and Copper Rule MR 5 2016
Coliform (TCR) MR 5 2005
Consumer Confidence Rule Other 4 2020
BHC-GAMMA MR 3 2019
Simazine MR 3 2019
Hexachlorocyclopentadiene MR 3 2019
Heptachlor MR 3 2019
Total Polychlorinated Biphenyls (PCB) MR 3 2019
Chlordane MR 3 2019
Di(2-ethylhexyl) adipate MR 3 2019
Benzo(a)pyrene MR 3 2019
Methoxychlor MR 3 2019
Heptachlor epoxide MR 3 2019
Atrazine MR 3 2019
LASSO MR 3 2019
HEXACHLOROBENZENE MR 3 2019
Toxaphene MR 3 2019
Endrin MR 3 2019
OXAMYL MR 2 2019
Carbofuran MR 2 2019
Asbestos MR 1 2005

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
PFTA 9/24/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 9/24/2024 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 9/24/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/24/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 9/24/2024 <9 µg/L 9 µg/L Not Detected
6:2 FTS 6/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 6/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 6/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 6/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 6/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 6/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 6/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 6/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 6/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 6/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 6/18/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 6/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 6/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 6/18/2024 <9 µg/L 9 µg/L Not Detected
NMeFOSAA 6/18/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 6/18/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 6/18/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFBA 6/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 6/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
8:2 FTS 3/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 3/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 3/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 3/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 3/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 3/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 3/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 3/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 3/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 3/18/2024 <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 SANTA ISABEL.

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 PR0003712 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
2022 Surface Water Treatment Rule MR 6 SDWIS / PR0003712 / 0200
2020 Consumer Confidence Rule Other 4 SDWIS / PR0003712 / 7000
2019 BHC-GAMMA MR 3 SDWIS / PR0003712 / 2010
2019 Simazine MR 3 SDWIS / PR0003712 / 2037
2019 Hexachlorocyclopentadiene MR 3 SDWIS / PR0003712 / 2042
2019 Heptachlor MR 3 SDWIS / PR0003712 / 2065
2019 Total Polychlorinated Biphenyls (PCB) MR 3 SDWIS / PR0003712 / 2383
2019 Chlordane MR 3 SDWIS / PR0003712 / 2959
2019 Di(2-ethylhexyl) adipate MR 3 SDWIS / PR0003712 / 2035
2019 Benzo(a)pyrene MR 3 SDWIS / PR0003712 / 2306
2019 Methoxychlor MR 3 SDWIS / PR0003712 / 2015
2019 Heptachlor epoxide MR 3 SDWIS / PR0003712 / 2067
2019 Atrazine MR 3 SDWIS / PR0003712 / 2050
2019 LASSO MR 3 SDWIS / PR0003712 / 2051
2019 HEXACHLOROBENZENE MR 3 SDWIS / PR0003712 / 2274

How SANTA ISABEL Compares

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

Metric SANTA ISABEL Puerto Rico avg Federal benchmark
Total violations 281 358.4 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 95 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 3,335 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 SANTA ISABEL water safe to drink? ▼
SANTA ISABEL (PWS ID: PR0003712) has 281 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,335 people using Surface Water sources.
How many people does SANTA ISABEL serve? ▼
SANTA ISABEL serves 3,335 people in UTUADO, Puerto Rico. It is a Local-owned system using Surface Water water sources with 1,249 service connections.
What type of violations does SANTA ISABEL have? ▼
SANTA ISABEL has 281 total violations: 95 health-based violations (MCL exceedances or treatment failures), 170 monitoring/reporting violations, and 83 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in SANTA ISABEL water? ▼
No. SANTA ISABEL was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does SANTA ISABEL use? ▼
SANTA ISABEL 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.

Read our methodology — how this data is sourced, computed, and verified.

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