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Community Water System · PWS PR0242122

Com. las Cuarenta

Lares, Puerto Rico 00669 - drinking water served from groundwater sources to 200 people, tracked in EPA SDWIS and UCMR5.

200
People served
314
EPA violations
42
Health-based
Untested
UCMR5 result

The verdict

EPA records 314 drinking-water violations at Com. las Cuarenta, 13% of them health-based - below the Puerto Rico per-system average.

314
Total EPA violations on record
13%
Health-based (MCL / treatment failure)
200
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Com. las Cuarenta

Com. las Cuarenta is a private-owned community water system that delivers drinking water to 200 residents in Lares, Puerto Rico (Lares Municipio County) through 62 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 314 total violations for this system , of which 42 (13%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 239 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 200 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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. Statewide, 40 of 99 UCMR5-tested systems have reported PFAS detections (40.4%).

Com. las Cuarenta's 314 violations sit below the Puerto Rico average.

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
200
Total Violations
314
Health-Based Violations
42
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
62
County
Lares Municipio
School/Daycare
No
MCL Violations
40
Monitoring Violations
239
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 200 2015
Coliform (TCR) MCL 40 2010
Revised Total Coliform Rule MON 38 2025
LEAD AND COPPER RULE REVISIONS TT 2 2024
LEAD AND COPPER RULE REVISIONS RPT 1 2024
Lead and Copper Rule MR 1 2023

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 Com. las Cuarenta.

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 PR0242122 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
2025 Revised Total Coliform Rule MON 38 SDWIS / PR0242122 / 8000
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / PR0242122 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / PR0242122 / 5200
2023 Lead and Copper Rule MR 1 SDWIS / PR0242122 / 5000
2015 Coliform (TCR) MR 200 SDWIS / PR0242122 / 3100
2010 Coliform (TCR) MCL 40 SDWIS / PR0242122 / 3100

How Com. las Cuarenta Compares

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

Metric Com. las Cuarenta Puerto Rico avg Federal benchmark
Total violations 314 358.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 42 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 200 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Com. las Cuarenta water safe to drink? ▼
Com. las Cuarenta (PWS ID: PR0242122) has 314 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 200 people using Groundwater sources.
How many people does Com. las Cuarenta serve? ▼
Com. las Cuarenta serves 200 people in Lares, Puerto Rico. It is a Private-owned system using Groundwater water sources with 62 service connections.
What type of violations does Com. las Cuarenta have? ▼
Com. las Cuarenta has 314 total violations: 42 health-based violations (MCL exceedances or treatment failures), 239 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Com. las Cuarenta water? ▼
No PFAS testing data is available for Com. las Cuarenta under the EPA's UCMR5 monitoring program.
What water source does Com. las Cuarenta use? ▼
Com. las Cuarenta 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

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

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